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Ordering number : EN*4743A
CMOS LSI
LC7233N-8818
Single-Chip PLL and Controller with LCD Driver
Preliminary Overview
The LC7233N-8818 is a single-chip electronic tuning microcontroller that supports control of an electronic tone/volume control IC (the LC7538JMD) and handles detachable front panel products based on the LC75853E/W keyed LCD driver. It is designed for automotive use and incorporates a PLL-based receiver that can receive all major worldwide radio transmissions.
Package Dimensions
unit: mm 3159-QFP64E
[LC7233N-8818]
Features
* Supports detachable front panel products. System chips: LC7233N, LC75853E/W and LC7538JMD * Supports anti-theft LED flashing and reminder to remove panel alarm functions. * Supports control of an electronic tone/volume control IC (the LC7538JMD). Functions: bass, treble, balance, fader * Muting function (with key, out and electronic tone controls) * Supports two color illumination control (dual systems). * Reduced LCD display output pin count achieved by operating at 1/3 duty and 1/3 bias drive using the LC75853E/W. * Up to 36 stations can be stored in preset memory: 6 stations for each band (FM1, FM2, FM3, VF, MW (MW1) and LW (MW2)). Previous station function also supported. * Auto preset memory function * Radio monitor output: operates during tape FF/REW. * CD function (with key, in, and out) * Tape function (Flashing direction display supported when FF and REW signal inputs are provided.) * Rich selection of double function keys for use with tape players * Tape character display * Supports use of electronic power switch. * Twenty diode matrix settings * Supports radio reception throughout the world. * Supports AM stereo reception in the USA and Japan.
SANYO:QIP64E
Contents
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Pin Assignment ........................................................ 2 Electrical Characteristics .......................................... 3 Radio Reception Frequencies ................................... 5 Key Matrix (LC75853E/W), Diode Matrix (DIMRX) ............................................ 6 Pin Functions ............................................................ 7 Diode Matrix (DIMRX) Select ................................ 9 LCD Display Pattern (1/3 duty, 1/3 bias) ............... 11 Display Examples ................................................... 13 Key Functions ........................................................ 15 Power Connection .................................................. 26 State Transition Diagram ....................................... 26 Timing .................................................................... 28 Initial States ............................................................ 34 Tracking Point Frequency ...................................... 34
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
72895TH (OT) No. 4743-1/36
LC7233N-8818
Pin Assignment
Specifications
Absolute Maximum Ratings at Ta = 25C, VSS = 0 V
Parameter Maximum supply voltage Input voltage Symbol VDD max VIN1 VIN2 VOUT1 VOUT2 IOUT1 Output current IOUT2 IOUT3 IOUT4 Allowable power dissipation Operating temperature Storage temperature Pd max Topr Tstg HOLD, STEREO, TAPE, SD, DIR, PANEL IN Inputs other than VIN1 BEEP, AMUTE, AOUT Output other than VOUT1 BEEP, AMUTE CE, CLK, DI, DO (LC75853E/W), CDIN, DKIN, SKIN, FF-REW T0, T1, T2, T3, T4, RES AOUT Ta = -40 to +85C Conditions Ratings -0.3 to +6.5 -0.3 to +13 -0.3 to VDD + 0.3 -0.3 to +15 -0.3 to VDD + 0.3 0 to 5 0 to 3 0 to 1 0 to 2 400 -40 to +85 -45 to +125 Unit V V V V V mA mA mA mA mW C C
Output voltage
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LC7233N-8818
Allowable Operating Ranges at Ta = -40 to +85C, VDD = 3.5 to 5.5 V
Ratings Parameter Symbol VDD1 Supply voltage VDD2 VDD3 VIH1 VIH2 Input high level voltage VIH3 VIH4 VIH5 VIL1 VIL2 Input low level voltage VIL3 VIL4 VIL5 FIN1 Input frequency FIN2 FIN3 FIN4 VIN1 Input amplitude VIN2 VIN3 VIN4 Conditions CPU and PLL operation CPU operation Memory retained TAPE, SD, DIR, PANEL IN HOLD STEREO K0, K1, K2, K3 DO (LC75853E/W), CDIN, DKIN, SKIN, FF-REW TAPE, SD, DIR, PANEL IN HOLD STEREO K0, K1, K2, K3 DO (LC75853E/W), CDIN, DKIN, SKIN, FF-REW XIN FMIN:VIN2, VDD1 AMIN (LW, MW):VIN3, VDD1 HCTR:VIN4, VDD1 XIN FMIN AMIN HCTR min 4.5 3.5 1.3 0.7 VDD 0.8 VDD 2.5 0.6 VDD 0.7 VDD 0 0 0 0 0 4.0 10 0.5 0.4 0.50 0.10 0.10 0.10 4.5 typ max 5.5 5.5 5.5 8.0 8.0 8.0 VDD VDD 0.3 VDD 0.4 VDD 1.3 0.2 VDD 0.3 VDD 5.0 130 10 12 1.5 1.5 1.5 1.5 Unit V V V V V V V V V V V V V MHz MHz MHz MHz Vrms Vrms Vrms Vrms
Electrical Characteristics for the Allowable Operating Ranges
Ratings Parameter Power down detection voltage Symbol VDET IIH1 IIH2 Input high level current IIH3 IIH4 IIH5 IIH6 IIL1 IIL2 Input low level current IIL3 IIL4 IIL5 Input floating voltage Pull-down resistance VIF RPD IOFFH1 IOFFH2 Output off leakage current IOFFH3 IOFFL1 IOFFL2 HOLD, TAPE, SD, DIR, PANEL IN, STEREO: VI = 5.5 V XIN: VI = VDD = 5.0 V FMIN, AMIN, HCTR: VI = VDD = 5.0 V K0, K1, K2, K3: VI = VDD = 5.0 V CDIN, DKIN, SKIN, FF-REW, DO (LC75853E/W): VI = VDD = 5.0 V AIN: VI = VDD HOLD, TAPE, SD, DIR, PANEL IN: VI = VSS XIN: VI = VSS FMIN, AMIN, HCTR: VI = VSS CDIN, DKIN, SKIN, FF-REW, DO (LC75853E/W): VI = VSS AIN: VI = VSS K0, K1, K2, K3 K0, K1, K2, K3: VDD = 5 V EO: VO = VDD T0, T1, T2, T3, T4, RES, CDIN, DKIN, SKIN, FF-REW, DO (LC75853E/W): VO = VDD BEEP, AMUTE: VO = 13 V EO: VO = VSS T0, T1, T2, T3, T4, RES, CDIN, DKIN, SKIN, FF-REW, DO (LC75853E/W): VO = VSS 0.01 75 100 0.01 0.01 2.0 4.0 5.0 10 0.01 2.0 4.0 5.0 10 50 3.0 10 3.0 15 30 30 10 0.05 VDD 200 10 3.0 5.0 10 3.0 Conditions min 2.7 typ 3.0 max 3.3 3.0 15 30 Unit V A A A A A nA A A A A nA V k nA A A nA A
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Ratings Parameter Symbol VOH1 VOH2 VOH3 VOH4 Output high level voltage VOH5 Conditions T0, T1, T2, T3, T4, RES: IO = -1 mA CE, CLK, DI (LC75853E/W): IO = -1 mA EO: IO = 500 A XOUT: IO = 200 A BAND1, BAND2, MODE, FMLOW, CE, CLK, DI (LC7538JMD), LOUD, IFCNT, MO/ST, LOC, POWER, CDOUT, NR1, NR2, MTL, APS, MUTE, DKOUT, LEDFLSH, T5, T6, T7: IO = -0.1 mA COM1, COM2: IO = 25 A T0, T1, T2, T3, T4, RES: IO = 50 A CE, CLK, DI (LC75853E/W): IO = 1 mA EO: IO = 500 A XOUT: IO = 200 A BAND1, BAND2, MODE, FMLOW, CE, CLK, DI (LC7538JMD), LOUD, IFCNT, MO/ST, LOC, POWER, CDOUT, NR1, NR2, MTL, APS, MUTE, DKOUT, LEDFLSH, T5, T6, T7: IO = 0.1 mA AOUT: IO = 0.5 mA, AIN = 1.3 V COM1, COM2: IO = 25 A BEEP, AMUTE: IO = 5 mA COM1, COM2: VDD = 5 V, IO = 20 A VDD1: FIN2 = 130 MHz VDD2: (Hold mode: see Figure 1.) VDD = 5.5 V, oscillator stopped, Ta = 25C (Backup mode: see Figure 2.) VDD = 2.5 V, oscillator stopped, Ta = 25C (Backup mode: see Figure 2.) 0.3 0.75 (150 ) 2.0 2.5 15 1.5 5 1 0.5 min VDD - 2.0 VDD - 1.0 VDD - 1.0 VDD - 1.0 typ VDD - 1.0 max VDD - 0.5 Unit V V V V
VDD - 1.0
V
VOH6 VOL1 VOL2 VOL3 VOL4 Output low level voltage VOL5
VDD - 0.75 0.5
VDD - 0.5 1.0
VDD - 0.3 2.0 1.0 1.0 1.0
V V V V V
1.0
V
VOL6 VOL7 VOL8 Output intermediate level voltage VM IDD1 IDD2 Supply current IDD3 IDD4
0.5 0.75 2.0 (400 ) 3.0 20
V V V V mA mA A A
Note: * K0, K1, K2, K3, TAPE, SD, DIR, PANEL IN, DO (LC75853E/W) All ports other than those specified above are left open.
Figure 1 IDD2 in Hold Mode
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Note: All ports other than those specified above are left open.
Figure 2 IDD3 and IDD4 in Backup Mode
Radio Reception Frequencies
Area Band FM a MW a FM b MW a FM c MW h FM c MW c LW a Frequency range (FM, SW: MHz AM: kHz) 87.5 -- 107.9 530 -- 1720 87.5 -- 108.0 530 -- 1720 87.5 -- 108.0 531 -- 1629 87.5 -- 108.0 531 -- 1620 153 -- 279 87.5 -- 108.0 531 -- 1620 153 -- 279 87.5 -- 108.0 531 -- 1620 146 -- 290 87.5 -- 108.0 531 -- 1620 146 -- 290 76.0 -- 90.0 522 -- 1629 87.5 -- 108.0 531 -- 1602 87.5 -- 108.0 531 -- 1602 65.0 -- 74.0 87.5 -- 108.0 531 -- 1620 Fref. (kHz) 25 10 25 10 25 9 25 9 1 12.5 9 1 25 9 1 12.5 9 1 25 9 25 9 25 9 5 25 9 Step (kHz) 200 10 100 10 50 9 50 9 1 (9) 25 9 1 (9) 50 9 1 (9) 25 9 1 (9) 100 9 100 9 100 9 30 50 9 IF FM (MHz) AM (kHz) 10.7 450 10.7 450 10.7 450 10.7 450/459 10.7 450/459 10.7 450/459 10.7 450/459 10.7 450/459 10.7 450/459 10.7 450/459 10.7 450/459 -10.7 450 10.7 450 -10.7 450 10.7 10.7 450 IF count tolerance (kHz) 10 3 10 3 10 3 10 3 0.6 10 3 0.6 10 3 0.6 10 3 0.6 10 3 10 3 10 3 10 10 3 1 1 1 0 0 0 1 1 1 Diode matrix (1: On 0: Off) B2 0 0 0 B1 0 0 0 B0 LW2 LW1 0 0 0 0 1 1 0 0 1 0 0 0 1 0 0 0 0 0 1 0 1 0 1 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0/1 1 0 0/1 1 0 0/1 0 0 1 0 0/1 SHIFT 0 0 1
U.S.A
Southeast Asia
FM d MW c LW a Europe FM c MW c LW b
FM d MW c LW b FM e MW e FM b MW f FM f MW g FM g MW c
Japan Saudi Arabia South Africa
East Europe
1
0
1
1
0
0
Note: 1. In Europe, the diode matrix SHIFT setting is used for IF selection. 2. The step size "(9)" refers to the step size in auto-tuning mode when IF counting is not performed.
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Key Matrix (LC75853E/W)
IN OUT KS1 KS2 KS3 KS4 KS5 KI1 M1 MTL M6 BAND/ILL1 PS/AMEM LOC KI2 M2 DNR LOUD/RMON POWER VF DISPLAY KI3 M3 APS MO/ST V-SEL SCAN UP CD KI4 KI5
M4 UP/T-UP V-UP SEEK UP MUTE
M5 DOWN/T-DOWN V-DOWN SEEK DOWN
Diode Matrix (DIMRX)
K0 v T0 B0 v T1 FMB0 v T2 IF COUNT0 v T3 DOUBLE FUNCTION 0 v T4 FADER v T5 NR C v T6 AUTO500 v T7 -20 dB ACC OFF ALARM SEL CD SELECT v MW2 SEL PRIORITY v RMON FF/REW v LED FLASH SEL EVR ON/OFF v POWER SW v AM STEREO SEL v DOUBLE FUNCTION 1 v VF AUTORETUNE v VF SELECT v IF COUNT1 v DOUBLE FUNCTION 2 v POWER OFF CLOCK ON v FMB1 v COLON v FM ONLY v B1 v LW1 v CLOCK v K1 v B2 v LW2 v K2 v IFSHIFT v K3 v
Momentary switch
Diode matrix
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Pin Functions
Pin 1 2 3 4 5 6 Name XIN TEST2 PG3 PG2 PG1 PG0 I/O I I I I I I Allocation -- -- TAPE SD DIR PANEL IN Active -- -- L H H/L L Ground connection Tape input detection Signal that reports station reception during auto tuning Tape direction display: The " " symbol is displayed on a high input, and the " " symbol on a low input. Detachable panel in/out detection: low indicates in, high indicates out. A 250 ms chatter rejection period is provided. Outputs a 50 ms 4.4 kHz pulse when a key is pressed. In VF mode, if the SKIN signal was high for 25 seconds (checked at approximately 25 ms intervals), this pin outputs an alarm signal and the LC7233N-8818 starts an auto up search for a low SKIN signal when a diode matrix VF SELECT setting of 0 is used. Since this pin uses an open drain output circuit, connect a pull-up resistor to this pin. Audio mute out. When low, the LC7233N-8818 sends a "-79 dB" data message to the LC7538JMD. This pin is low when HOLD is low (clock enabled). Connect a pull-up resistor to this pin since it uses an open drain output. Connect to the LC75853E/W CE pin. Connect to the LC75853E/W CLOCK pin. Connect to the LC75853E/W DI pin. Connect to the LC75853E/W DO pin. When this pin goes low, the LC7233N-8818 turns on the CD display, switches to CD mode, and sets the CDOUT pin high. If the CD key is pressed again in this state, the LC7233N-8818 turns off the CD display and sets CDOUT low. Similarly, if the CDIN pin goes from low to high, the LC7233N-8818 turns off the CD display and sets CDOUT low. Note that the CD state cannot be switched with only the CD key if CDIN is high. The CD has the highest priority, with the total priority order being: CD > TAPE > RADIO. In products for the European market, when the LC7233N-8818 is in VF mode and either tape or CD mode, the LC7233N-8818 will switch to radio mode allowing ARI broadcasts to be received if a low level is input to this pin (more precisely, if this signal is low three times in a row at 25 ms intervals). Also, after an SK SEEK, 250 ms after SKIN is determined to be low the LC7233N-8818 performs a DK determination. If this signal goes low in FM mode with the diode matrix VF SELECT setting set to 1, the SK display is turned on. This does not depend on the on/off state of the VF key. When the VF key is pressed the LC7233N-8818 starts a search for a low SKIN signal. The LC7233N8818 checks the signal about 375 to 500 ms after an SD is determined to exist, and if low, that channel is held. Thereafter, if a high level continues for 25 seconds (checked every 25 ms) the LC7233N-8818 starts an auto-retune operation. The LC7233N-8818 checks the SKIN signals in M1 to M6, skipping over channels with high SKIN signals and stopping at the first channel with a low SKIN signal. If this pin goes high when the LC7233N-8818 is in tape mode, the LC7233N-8818 switches to radio monitor mode. Also at this time, the currently displayed scan display flashes at a 1 Hz rate. The LC7233N-8818 remains in tape mode while this pin is low. Connected to the LC75853E/W RES pin Diode scan out Diode scan out Diode scan out Diode scan out Diode scan out Diode scan in Diode scan in Diode scan in Diode scan in Function 4.5 MHz crystal oscillator connection Handling when unused -- -- Connect directly to VDD. -- Connect directly to VSS or VDD. Connect directly to VSS.
7
PH3
O
BEEP (ALARM)
L
Open
8
PH2
O
AMUTE
L
Must be used.
9 10 11 12
PF3 PF2 PF1 PF0
O O O I
CE CL DI DO
H H/L H H
Must be used. Must be used. Must be used. Must be used.
13
PE3
I
CDIN
L
Connect to VSS.
14
PE2
I
DKIN
L
Connect to VDD.
15
PE1
I
SKIN
L
Connect to VDD.
16
PE0
I
FF-REW
H
Connect to VSS. Open Open Open Open Open Open Open Open Open Open
17 18 19 20 21 22 23 24 25 26
PC1 PC0 PB3 PB2 PB1 PB0 PA3 PA2 PA1 PA0
O O O O O O I I I I
RES T4 T3 T2 T1 T0 K3 K2 K1 K0
L H H H H H H H H H
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LC7233N-8818
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Pin 27 28 29 Name S23 S22 S21 I/O O O O Allocation T5 T6 T7 Active H H H Diode scan out Diode scan out Diode scan out Outputs a high level for 0.25 second and a low level for 0.75 second when PANEL IN goes high. However, the LC7233N-8818 only performs this operation when the diode matrix LED FLASH setting is 0. Outputs a high level when DKIN goes low. Inverted by the mute key. When high, the volume level display flashes at a 1 Hz rate. Valid when HOLD is high and main power is on. In tape mode, outputs a high level when the APS display is lit, and a low level when that display is off. Valid when HOLD is high and main power is on. In tape mode, outputs a high level when the MTL display is lit, and a low level when that display is off. Valid when HOLD is high and main power is on. In tape mode when the diode matrix NR setting is 1 (i.e., when DNRC is selected), outputs a high level when the DNR display and the C in the preset CH digit are lit, and a low level when that display is off. Valid when HOLD is high and main power is on. In tape mode, outputs a high level when the DNR display and the B in the preset CH digit are lit, and a low level when that display is off. Valid when HOLD is high and main power is on. CD source switch (See the CDIN pin description.) Outputs a high level when the power is on (when the diode matrix POWER SW setting is 1 and the POWER key is on). Outputs low when power is off. In radio mode when the LOC display is lit, outputs a high level only during seek or scan when a seek or scan is started. Outputs low when display is off. Valid when HOLD is high and main power is on. In radio mode during FM reception (including VF and radio monitor), outputs a low level when the ST display is lit, and a high level when that display is off. However, note that this output is enabled for the US and Japanese MW band when the diode matrix AM ST SEL setting is 0. Outputs a low level in other modes, i.e., tape or CD mode, and when HOLD is low (clock enabled). This signal switches the IF counter buffer on and off. Outputs a high level only when there is an SD during auto search, otherwise outputs a low level. Outputs a high level when the LOUD display is lit, and a low level when that display is off. Valid when HOLD is high and main power is on. Connected to the LC7538JMD DATA pin. Connected to the LC7538JMD CLOCK pin. Connected to the LC7538JMD CE pin. Outputs a high level when the FM band is from 64.0 to 74.0 MHz, and a low level when the FM band is from 87.5 to 108.0 MHz. Outputs a high level in radio mode, including when DK is on, and outputs a low level in tape and CD modes. Outputs a low level when HOLD is low and PANEL IN is high. These signals change as shown in the table below when the band key is pressed. 48 S2 O BAND2 H/L BAND MW LW FM 49 S1 O BAND1 H/L VF 1 1 Note: 0 = Low, 1 = High 50 51 COM2 COM1 O O -- -- These pins are left open in normal operation. BAND1 0 0 1 BAND2 0 1 0 Including times when DK is on Note Including tape and CD modes Function Handling when unused Open Open Open
30
S20
O
LEDFLSH
H
Open
31 32
S19 S18
O O
DKOUT MUTE
H H
Open Open
33
S17
O
APS
H
Open
34
S16
O
MTL
H
Open
35
S15
O
NR2
H
Open
36 37 38
S14 S13 S12
O O O
NR1 CDOUT POWER
H H H
Open Open Open
39
S11
O
LOC
H
Open
40
S10
O
MO/ST
H
Open
41
S9
O
IFCNT
H
Open
42 43 44 45 46
S8 S7 S6 S5 S4
O O O O O
LOUD DI CL CE FMLOW
H H H/L H H
Open Open Open Open Open
47
S3
O
MODE
H/L
Open
Must be used.
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Pin Name I/O Allocation Active Function Detects the external power switch on/off state. When HOLD goes from high to low: * When the clock is enabled: The oscillator is not stopped and the clock continues to count. (Hold mode; IDD = 1.5 mA typ) * When the clock is disabled (when the diode matrix LED FLASH setting is 1): The oscillator is stopped and the LC7233N-8818 enters low power mode. (Backup mode; IDD = 5 A max) Connected to VSS. Inputs the FMIF and AMIF signals. Input an AC coupled signal of 100 mV rms or over. See the description of the diode matrix IFCOUNT0 and IFCOUNT1 settings. Tolerance: FM 10 kHz, MW 3 Hz, LW 0.6 kHz When HOLD is high, the display is turned on 500 ms after a low level input in radio mode (FM or VF) only. Display starts 500 ms after HOLD goes from low to high. However, this function is also enabled in MW mode in products for the US and Japanese markets when the diode matrix AM ST SEL setting is 1. +5 V input FM local oscillator input Input an AC coupled signal of 100 mVrms or over. AM local oscillator input Input an AC coupled signal of 100 mVrms or over. Connected to ground. Phase comparator output: connected to the LPF input. LPF amplifier input LPF amplifier output Connected to ground. 4.5 MHz crystal oscillator connection Handling when unused
52
HOLD
I
HOLD
L
Must be used.
53
ADI
I
VSS
--
Connect directly to VSS. Connect directly to VSS.
54
HCTR
I
HCTR
--
55
SNS
I
STEREO
L
Connect directly to VDD.
56 57 58 59 60 61 62 63 64
VDD FMIN AMIN VSS EO AIN AOUT TEST1 XOUT
-- I I -- O I O I O
-- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- --
-- Connect directly to VSS. Connect directly to VSS. -- Must be used. Connect directly to VSS. Connect directly to VSS. -- --
Diode Matrix (DIMRX) Select
0: without diode, 1: with diode Diode matrix name On/ off 0 CLOCK 1 0 CD SELECT B0 B1 B2 IFSHIFT LW1 LW2 1 Function Clock function enabled. 12 Hr: USA, Japan, Saudi Arabia, South Africa, Southeast Asia 24 Hr: Europe, East Europe Clock function disabled. CD function disabled. CDIN disabled. The CDOUT pin outputs a low level. Connect CDIN to VDD. CD function enabled. When CDIN is low CDOUT will be high, and when CDIN is high CDOUT will be low. The CD key is also enabled. (See the item on the CDIN pin.)
--
See the reception frequency table.
FMB1 0 FMB0 FMB1 0 1 1 0 FM ONLY 1
FMB0 0 1 0 1 FM1, FM2, FM3 FM1, FM2 FM1 Illegal value (18 stations) (12 stations) (6 stations)
Number of preset FM stations
The FM, MW, and LW bands are enabled. Only the FM band is enabled. The band key is disabled. The number of FM bands depends on the diode matrix FMB0 and FMB1 settings.
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0: without diode, 1: with diode Diode matrix name On/ off 0 Function DNR C is disabled. The NR key switches noise reduction between off and NR B. DNR is displayed. DNR C is enabled. The NR key switches noise reduction from off to NR B to NR C to off. KEY on NR C 1 Pin NR1 NR2 L L H L L H Display (digit 1) Off Off NR B `DNR' NR C `DNR'
The mode is displayed in digit 5. POWER SW 0 1 0 1 The power is turned on and off using the HOLD pin. See section 9, "Power Connection Examples." The power is turned on and off using the power key. See section 9, "Power Connection Examples." Clock display takes priority. Frequency, tape, or CD display takes priority. Enabled/ disabled Enabled Enabled Enabled Disabled HCTR pin FMIF/AMIF FMIF only AMIF only Connected to GND. LW seek is performed in 9 kHz steps.* When the clock function is enabled (the diode matrix CLOCK setting is 0).
PRIORITY
IFCOUNT1 IFCOUNT0 IFCOUNT0 IFCOUNT1 0 0 1 1 COLON VF AUTORETUNE VF SELECT POWER OFF CLOCK ON EVR ON/OFF 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1
Note For use with FMIF/AMIF single pin tuner ICs.
The clock colon display is always lit. The clock colon display flashes at 1 Hz. In VF mode, the LC7233N-8818 retunes if SKIN is high continuously for 25 seconds. However, note that an alarm is output. In VF mode, the LC7233N-8818 does not retune even if SKIN is high continuously for 25 seconds. Note that no alarm is output. VF mode disabled. VF mode enabled. The clock is not displayed when the main power is turned off. The clock is always displayed when the main power is turned off. An electronic volume function is built in. An electronic volume function is not built in. Nor is it displayed. A fader function is built in. The V-SEL key switches the fader as follows. VOLUME BASS TREBLE BALANCE FADER
FADER
1
No fader function is built in. VOLUME BASS TREBLE BALANCE
M1, M2, and M3 can be independently selected with the radio mode and tape mode double function keys as shown in the table below. A "--" entry indicates that there is no double function. FUNCTION2 0 DOUBLE FUNCTION 0 FUNCTION 1 FUNCTION 2 0 0 0 1 1 1 1 FUNCTION1 0 0 1 1 0 0 1 1 FUNCTION0 0 1 0 1 0 1 0 1 M1 -- MTL NR MTL APS MTL NR MTL M2 -- -- -- NR -- APS APS NR M3 -- -- -- -- -- -- -- APS
RMON FF/REW
0 1 0
The LC7233N-8818 switches to radio monitor mode regardless of the state of the radio monitor key when a high level is input to the FF-REW pin. The RMON display flashes at a 1 Hz rate. The LC7233N-8818 switches to radio monitor mode when the RMON key is on, the RMON display is lit, and a high level is input to the FF-REW pin. The RMON display flashes at a 1 Hz rate. Invalid when the RMON display is off. The UP/DOWN keys perform manual up/down tuning operations. The UP/DOWN keys function as T-UP/T-DOWN keys. If one of these keys is pressed for less than 500 ms, a manual tuning operation is performed, and if pressed for more than 500 ms, a seek tuning operation is performed.
AUTO500 1
Note: * The seek for a manual up or down jumps in 9 kHz steps.
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0: without diode, 1: with diode Diode matrix name AM ST SEL On/ off 0 1 0 -20 dB 1 0 Function The MO/ST key is disabled in the MW band when Japan or USA is selected. The MO/ST key is enabled in the MW band when Japan or USA is selected. When the MUTE key is pressed and the MUTE output goes high, a -79 dB data item is sent to the electronic volume control IC. When the MUTE key is pressed and the MUTE output goes high, a data item for only -20 dB less than the current volume is sent to the electronic volume control IC. When the LC7233N-8818 enters the ACC OFF state (when HOLD is low) a panel removal reminder alarm is not output from the ALARM pin. When the LC7233N-8818 enters the ACC OFF state (HOLD is low) a panel removal reminder alarm will be output from the ALARM pin. The alarm signal frequency is about 4.4 kHz, and lasts for about 20 seconds. ACC OFF ALARM SEL 1
0 MW2 SEL 1 0 LED FLASH 1
There is no MW2 band, and only the MW band is displayed. When there is no LW band, the MW2 band is added, and these bands are referred to as MW1 and MW2. The display for MW1 is "MW I", and the display for MW2 is "MW II". A pulse (high for 250 ms, low for 750 ms) is output from the LEDFLSH pin in the ACC OFF state (HOLD is low) when PANEL IN is high. The LEDFLSH pin remains low when the LC7233N-8818 enters the ACC OFF state (when HOLD goes low) and PANEL IN is high. At this time the LC7233N-8818 enters backup mode if the clock function is disabled.
LCD Display Pattern (1/3 Duty, 1/3 Bias)
1. Digit Position
No. 4743-11/36
LC7233N-8818 * LC75853 LCD pattern layout
COM3 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 RMON 1bc 2f 2h 2a 3f c1 3a 4f 4h 4a 5f c2*3 5a L AM 6f CH 6a DNR L10 L7 L4 L1 PM 6e 6g 6b APS L11 L8 L5 L2 METAL L9 L6 L3 6c I I (l)*1 COM2 II I (r)*1 ST VF F 2e 2g 2b 3e 3g 3b 4e 4g 4b 5e 5g 5b COM1 FM MW*2 LW LOC SK 2d 2i 2c 3d 3i 3c 4d 4i 4c 5d R*4 5c +, - LOUD 6d
Note: 1. I(l) refers to the left side. I(r) refers to the right side. 2. It is possible to display only the MW segment when only MW1 is enabled. 3. c2 is shared between the clock colon and the frequency dp. 4. R is shared between the Rear and Light displays.
2. Segment Pattern
No. 4743-12/36
LC7233N-8818 3. Common Pattern
Display Examples
1. Tape
2. Volume
3. Balance
No. 4743-13/36
LC7233N-8818 4. Bass
5. Treble
6. Fader
7. CD
8. FM VF
No. 4743-14/36
LC7233N-8818 9. MW
10. CLOCK (12 Hrs)
11. CLOCK (24 Hrs)
Key Functions
1. M1 to M6 * Radio mode In radio mode, these keys are used for writing to and reading from preset memory. When one of the M1 to M6 keys is pressed, if it is released within 1.5 seconds, then the corresponding memory contents are recalled. If it is held down for over 1.5 seconds, then the currently displayed frequency is stored in the corresponding memory. * Tape mode In tape mode, the M1, M2, and M3 keys function as tape control keys. The function of these double function keys can be selected by changing diode matrix settings. * VF mode In VF mode, the M1 to M6 keys have tuning functions during tape and radio operation.
No. 4743-15/36
LC7233N-8818 2. UP/T-UP, DOWN/T-DOWN * When the diode matrix AUTO500 setting is 0. Each time one of these tuning keys is pressed the frequency is increased or decreased by one step. If a tuning key is held down for over 500 ms, the frequency is advanced rapidly at about 70 ms per step. When the frequency changes from band edge to band edge, the LC7233N-8818 pauses for about 500 ms. * When the diode matrix AUTO500 setting is 1. When these keys are held down for less than 500 ms they function as manual tuning keys, and when held down for over 500 ms, the LC7233N-8818 enters seek mode. Both of these functions are valid when HOLD is high, PANEL IN is low and main power is on. In VF mode, these keys function as seek up and seek down keys. 3. DISPLAY + UP/T-UP When the time is displayed, pressing these keys at the same time adjusts the minutes setting. Each time these keys are pressed and held down for less than 500 ms the time setting is advanced by one minute, and if they are held down for over 500 ms, the time setting is advanced at eight minutes per second. These operations reset the seconds setting to zero. 4. DISPLAY + DOWN/T-DOWN When the time is displayed, pressing these keys at the same time adjust the hour setting. Each time these keys are pressed the time setting is advanced by one hour, and if they are held down for over 500 ms, the time setting is advanced at four hours per second. The minute and second settings do not change due to this operation. 5. SEEK UP, SEEK DOWN These keys automatically search for a station broadcast and lock onto the received station. If the SCAN key is pressed during a seek, the LC7233N-8818 switches to scan mode. Therefore, if the SCAN UP key is pressed during a downward seek, an upwards scan is started. Also, during a seek up (down), if seek down (up) is pressed, a seek down (up) operation is started. The search mode is cleared by pressing the same key a second time. When the frequency changes from one band edge to another, the LC7233N-8818 pauses for 500 ms. The search speed is 50 ms/step for FM and 70 ms/step for AM. These functions are valid when HOLD is high, PANEL IN is low and main power is on. 6. SCAN UP The scan function automatically searches for the next station, and when a station is found holds that station for 5 seconds (with AMUTE at the high level) and flashes the channel display. Pressing this key once more during that interval causes the LC7233N-8818 to hold at that station. If no user action occurs during that 5 second interval, the search resumes. Pressing the SEEK DOWN key during a scan starts a downward seek operation. Scan mode is cleared by pressing the SCAN UP key a second time. When the frequency changes from one band edge to another, the LC7233N-8818 pauses for 500 ms. The search speed is 50 ms/step for FM and 70 ms/step for AM. This function is valid when HOLD is high, PANEL IN is low and main power is on.
No. 4743-16/36
LC7233N-8818 7. BAND/ILL1 * This key switches the band as shown below when released within 1.5 seconds. FM1 (FM2) (FM3) MW LW
This function is valid when HOLD is high, PANEL IN is low and main power is on. * Holding this key down for more than 1.5 seconds inverts the output of the LC75853E/W S1 pin from low to high or from high to low. Its initial state is the low level. This function is valid when HOLD is high, PANEL IN is low and main power is on. 8. VF Pressing this key in radio mode switches the LC7233N-8818 to FM band radio mode regardless of which band was previously selected. The VF display is turned on and the BAND1 and BAND2 outputs go high. The SD pin is checked 375 ms later (500 ms later if the previous band was the AM band) and after another 375 to 500 ms the SKIN input is checked. If the input was low, the current frequency is held, and if high, an automatic SK station search is started. When the input goes low, that frequency is held. (See the state transition diagram on page 18.) The SK display is lit if SKIN is low, the mode is FM, and the LC7233N-8818 is set for European reception.
Key Display state Lit Off Output state BAND1 H * BAND2 H *
VF Note: * The state from the previous band.
VF
Pressing the VF SEEK key causes the LC7233N-8818 to perform the operation shown in the table below based on the VF mode and the SKIN signal state.
VF (VF mode) SKIN When the VF key is pressed VF mode is turned on and an SK station search is started. VF mode is turned on. When the SEEK key is pressed A normal station search is started. A normal station search is started. When, during a seek, the seek key for the same direction is pressed The LC7233N-8818 stops at the frequency where pressed. The LC7233N-8818 stops at the frequency where pressed. When the VF key is pressed during a seek. VF mode is turned on and an SK station search is started. VF mode is turned on and an SK station search is started. VF mode is turned off and the LC7233N-8818 returns to the state prior to entering VF mode.
Off
H
Off
L
On
H/L
VF mode is turned off.
An SK station search is started.
The seek continues.
* In tape or CD mode (when VF mode is off), the operation shown in the table below is performed based on the SKIN and DKIN signal states.
SKIN DKIN Operation when VF mode is switched from off to on by pressing the VF key in tape or CD mode The LC7233N-8818 displays the frequency and starts an SKIN signal seek up operation. The display reverts to tape or CD when a low level SKIN signal frequency is found. If DKIN is low, operation below is performed. The display remains in tape or CD display mode. If DKIN is low, operation below is performed. If the diode matrix VF AUTORETUNE setting is 0, a retune operation is performed if SKIN had been low for 25 seconds (checked every 25 ms). The frequencies in M1 to M6 are checked for a high SKIN signal, and if none is found, a seek up operation is performed. The frequency is displayed and an ARI broadcast is started. Mode
H
H
TAPE mode CD mode
L
H
TAPE mode CD mode
L
L
VF mode
No. 4743-17/36
LC7233N-8818 When the radio monitor function is on and VF mode is switched from off to on, the radio monitor function is cleared and operation or is performed. * During power on (HOLD switching from low to high), SKIN is checked for 25 seconds, and a retune operation is started if it was high. The frequencies in M1 to M6 are checked for a high SKIN signal, and if none is found, a seek up operation is performed. * This function is valid when HOLD is high, PANEL IN is low and main power is on. * VF mode is cleared by pressing the VF or BAND keys. However, the BAND key will not work when the TAPE signal is low, CD mode is on, or the radio monitor function is on. The figure below shows the state transition diagram for VF mode.
Note: 1. The radio monitor function is cleared at this time. 2. Keys are indicated in boxes. 3. When VF mode is switched from on to off the radio monitor function is cleared if it was enabled.
No. 4743-18/36
LC7233N-8818 9. PS/AMEM Pressing this key for under 2 seconds invokes the preset scan function, and pressing it for over 2 seconds invokes the auto store memory operation. This function is valid when HOLD is high and main power is on. * PS operation Pressing this key starts a preset channel search in increasing channel number order starting with the channel following the currently displayed channel number. When no channel number is being displayed, the search starts at channel number 1. If a station is being received, the AMUTE (which is high) is cleared for 5 seconds. The LOC/DX switch is set to DX regardless of its current setting state, and the channel number display flashes at a 1 Hz rate during the preset channel search. This function is cleared by pressing the PS key a second time. The keys listed below will also clear this functions. PS/AMEM, SEEK UP, SEEK DOWN, SCAN, UP, DOWN, M1 to M6, POWER, BAND, VF Furthermore, it is also cleared by the HOLD signal going from high to low, or by the LC7233N-8818 entering tape or CD mode. The preset scan direction operates as shown below depending on the diode matrix FMB0, FMB1 and B0 to B2 settings. FM1 (FM2) (FM3) FM mode MW (1) MW mode * Auto memory (AMEM) operation When this key is held down for over 2 seconds, the LC7233N-8818 starts the auto memory operation. This operation is performed in two cycles, the first in local mode (with the LOC pin high) and the second in DX mode (with the loc pin low). The search starts from the low end of the band and stores the stations found in order from M1 to M6. If all memories were not filled in local mode, it proceeds to the second cycle. -- FM band [FM1, FM2 and FM3 selected] (diode matrix FMB0 and FMB1 set to 0 and 0) : When started from the FM1 band stations are stored from FM1 M1 to FM1 M6 .................Six stations : When started from the FM2 band stations are stored from FM2 M1 to FM2 M6 .................Six stations : When started from the FM3 band stations are stored from FM3 M1 to FM3 M6 .................Six stations [FM1 and FM2 selected] (diode matrix FMB0 and FMB1 set to 1 and 0) : When started from the FM1 band stations are stored from FM1 M1 to FM1 M6 .................Six stations : When started from the FM2 band stations are stored from FM2 M1 to FM2 M6 .................Six stations [Only FM1 selected] (diode matrix FMB0 and FMB1 set to 0 and 1) : When started from the FM1 band stations are stored from FM1 M1 to FM1 M6 .................Six stations [VF selected] (diode matrix VF SELECT set to 1) : When started from the VF band stations are stored from VF M1 to VF M6 .........................Six stations (MW2)
No. 4743-19/36
LC7233N-8818 -- MW and LW bands Initially the LOC pin is set high, and stations are stored in local mode starting at M1. If stations were not stored through M6, the LOC pin is set to low, and storing continues in DX mode. -- When the LW band is not supported, i.e., the diode matrix MW2 SEL is set to 1 (bands MW1 and MW2 provided) : When started from the MW1 band stations are stored from MW1 M1 to MW1 M6 .............Six stations : When started from the MW2 band stations are stored from MW2 M1 to MW2 M6 ............Six stations During the auto memory operation, whatever band is selected, the channel number is displayed flashing at a 1 Hz rate. When the operation completes, the LC7233N-8818 executes a PS search operation if any stations were stored in memory. If no stations were found, the contents of memory channel M1 are recalled. The following keys will cancel this operation. PS/AMEM, POWER, BAND, VF, CD Furthermore, this operation is also cleared by the HOLD signal going from high to low, or by the LC7233N8818 entering tape or CD mode. 10. CD When the CDIN signal is low, pressing this key switches the LC7233N-8818 to CD mode. The CD display is lit and the CDOUT signal is set high.
Key CD Display state Lit Off Output state H L
If this key is pressed again CD mode is cleared, the CD display is turned off and CDOUT is set low. When the HOLD input is high, this key switches the LC7233N-8818 to CD mode with the highest priority. CD mode is not cleared by switching the HOLD signal from high to low and back to high again. Nor is it cleared by switching the power from on to off and back on again. This operation is valid when HOLD is high and system power is on.
No. 4743-20/36
LC7233N-8818 11. DISPLAY When the clock function is enabled, i.e, the diode matrix CLOCK setting is 0, this key is used to switch the display with that for the current mode, e.g. between clock and frequency display, clock and tape display, and clock and CD display. This operation is valid when HOLD is high and main power is on. This operation is valid when HOLD is high and main power is on or off.
Mode DIMRX "PRIORITY" = 0 (Clock display takes priority) DIMRX "PRIORITY" = 1 Frequency display DISPLAY Clock display * RADIO key RADIO mode * RADIO key PS/AMEM , SEEK UP , SEEK DOWN , SCAN , UP , DOWN M1-M6 , POWER , BAND , VF , LOC Frequency display Frequency display DISPLAY Off after 5 seconds Clock display Five seconds after operation complete Clock display DISPLAY Off after 5 seconds Frequency display However, note that if a radio key is pressed during clock display, the LC7233N-8818 returns to frequency display even if the 5 seconds have not elapsed. Tape display DISPLAY Clock display DISPLAY Off after 5 seconds Tape display CD display DISPLAY DISPLAY CD mode Clock display CD display DISPLAY Off after 5 seconds Clock display Clock display DISPLAY Off after 5 seconds CD display During tape or CD input SKIN = "L" DK off Tape or CD display DK on After 5 seconds Tape or CD display SK search Frequency display VF mode SK search Frequency display After 5 seconds Clock display DK on SKIN = "L" DK off DISPLAY
DISPLAY TAPE mode Clock display Tape display
DISPLAY Off after 5 seconds Clock display
* During tape input, tape display is performed for 5 seconds.
* During CD input, CD display is performed for 5 seconds.
12. LOC When this key is pressed in radio mode the LOC display is turned on. If the SEEK key or the SCAN key is pressed in this state, the LOC pin goes high and a local search is performed. When the seek or scan function is cleared the LOC pin goes low. (See section Timing-4.)
Key LOC LOC Display state Lit Off Normal operation output state L L Search operation output state H L
This operation is valid when HOLD is high and main power is on.
No. 4743-21/36
LC7233N-8818 13. LOUD/RMON * When pressed for less than 1.5 seconds: Pressing this key turns on the LOUD display and sets the LOUD pin to the high level. Pressing the key again turns off the LOUD display and sets the LOUD pin to the low level. This operation also turns on and off the loudness function implemented in the LC7538JMD.
Key LOUD LOUD Display state Lit Off Output state H L
This operation is valid when HOLD is high and main power is on. * When pressed and held down for over 1.5 seconds: 1. When the diode matrix RMON FF/REW setting is 0: This key operation has no effect. When the FF-REW pin goes high, regardless of the state of this key, the LC7233N-8818 enters radio monitor mode temporarily. The RMON display flashes at a 1 Hz rate and radio reception becomes possible. 2. When the diode matrix RMON FF/REW setting is 1: When this key is pressed the RMON display lights. When the FF-REW pin goes high in this state, the LC7233N-8818 enters radio monitor mode temporarily. The RMON display flashes at a 1 Hz rate and radio reception becomes possible. Pressing this key again clears radio monitor mode and returns the LC7233N-8818 to the previous mode. Operations 1 and 2 are both possible in VF mode even in the DK wait (standby) state.
Key Display State (setting state) Lit (enabled) Off (disabled) FF-REW L Lit Off H Blinking at a 1 Hz rate
RMON
RMON
This operation is valid when HOLD is high and main power is on. 14. POWER (when the diode matrix POWER SW setting is 1) This key is used when the tact key in the key matrix controls the power. When this key is pressed the POWER pin goes high and furthermore, the LC7233N-8818 switches to tape mode if there is tape input or to CD mode if CD is on, i.e., if the CDIN pin is low. 15. MO/ST When the LC7233N-8818 is in an FM radio mode (including VF mode), pressing this key turns on the ST display. Pressing this key again turns off the ST display.
Key MO/ST ST Display state Lit Off Output state L H
However, note that this operation is valid for both the FM and MW bands in products for the US and Japanese markets when the diode matrix AM ST SEL setting is 1. This setting can be specified independently for the FM and MW bands (but not for each of the FM1, FM2, FM3, MW1 and MW2 bands).
No. 4743-22/36
LC7233N-8818 16. V-SEL When this key is pressed, a cyclic operation is started from the bass setting, which is the next item in the cycle. Five seconds after the key is released, the LC7233N-8818 automatically returns to the volume control position and the seven segment character display returns to frequency, tape, or CD display. However, if the V-UP or V-DOWN key is pressed within 5 seconds, then five seconds after that key is released, the LC7233N-8818 automatically returns to the volume control position and the seven segment character display returns to frequency, tape, or CD display. VOLUME BASS TREBLE BALANCE * FADER
Note: * When the diode matrix FADER setting is 1.
When this key is first pressed, the cycle always starts from the volume position. 17. V-UP and V-DOWN These keys increase or decrease a level setting in 2 dB steps each time they are pressed. When DK is on, the volume can be increased up to -30 dB. When the volume is -30 dB or over, it remains at that level. * Volume mode
When the V-UP or the V-DOWN key is held down for over 500 ms, the level setting is increased or decreased at a 150 ms/dB rate.
Display point Volume (dB) 1 2 -50 3 -42 4 -34 5 -26 6 -18 7 -12 8 -8 9 -4 10 -2 11 0
When the value falls under the value listed in the table, the display shifts to the next point.
* Bass/Treble mode
No. 4743-23/36
LC7233N-8818 The bass or treble is shifted at a 150 ms/step rate when the V-UP or V-DOWN key is held down for over 500 ms.
Display point Step value 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11
* Balance mode
The balance is shifted at a 150 ms/dB rate when the V-UP or V-DOWN key is held down for over 500 ms.
Display point Volume difference (dB) 1 - 2 -20 3 -8 4 -4 5 -2 6 0 7 -2 8 -4 9 -8 10 -20 11 -
No. 4743-24/36
LC7233N-8818 * Fader mode
The fader is shifted at a 150 ms/dB rate when the V-UP or V-DOWN key is held down for over 500 ms.
Display point Volume difference (dB) 1 -45 2 -20 3 -14 4 -8 5 -2 6 0 7 -2 8 -8 9 -14 10 -20 11 -45
18. Mute When the diode matrix -20 dB setting is 0, pressing this key sets the MUTE pin high and the AMUTE pin low, and when the diode matrix -20 dB setting is 1, pressing this key sets the MUTE and AMUTE pins high. When the key is pressed again the changed pins are returned to their previous state. The LC75853E/W volume setting is set to -79 dB by this operation. Additionally, the volume level display (not including the + or - indicators) flashes at a 1 Hz rate. In the initial state the MUTE pin is low. 19. ILL2 Port (the LC75853E/W pin 2)
RADIO S2 (2 pin) H TAPE or CD L When HOLD is low, or in the initial state L
The state of the LC75853 S2 changes depending on whether the LC7233N-8818 is in radio mode or tape mode.
Valid when PANEL IN is low. This is optimal for two-color illumination control based on the mode when ACC is on (i.e., main power is on).
No. 4743-25/36
LC7233N-8818
Power Connection
1. POWER Key Systems (when the diode matrix POWER SW setting is 1)
2. External Power Switch Systems (when the diode matrix POWER SW setting is 0)
State Transition Diagram
1. Normal Mode, Clock Disabled
No. 4743-26/36
LC7233N-8818 2. Normal Mode, Clock Enabled
3. VF Mode, Clock Disabled
Note:
The radio monitor transitions have been omitted.
No. 4743-27/36
LC7233N-8818 4. VF Mode, Clock Enabled
Note: 1. Keys are indicated in boxes. However, note that when FF-REW is high (+ RMON is on: based on the diode matrix RMON FF-REW setting) the LC7233N-8818 goes to radio monitor mode. 2. CD on operates identically when CDIN is low. 3. If VF is switched from off to on during radio monitor mode, radio monitor mode is cleared and the LC7233N-8818 switches to VF mode. 4. If DKIN goes low during radio monitor mode, radio monitor mode is cleared and SK broadcast begins.
Timing
1. T-UP/DOWN, SEEK, SCAN
Note: 1. IF count tolerance FM MW LW 10.7 MHz 10 kHz 450 kHz 3 kHz 450 kHz 0.6 kHz
2. An SD check is performed for 10 ms if IF count is enabled, and for 15 ms if IF count is disabled.
No. 4743-28/36
LC7233N-8818 2. Manual Up/Down (both FM and AM)
3. VF Auto-Retune The LC7233N-8818 retunes with the following timing if a high level on SKIN continues for more than 25 seconds in VF mode.
Note: 1. The timing for the VF preset memory search technique is shown in the figure below.
2. If there is no SD in a VF preset memory, a normal VF seek up operation is performed with timing identical to (1) above.
No. 4743-29/36
LC7233N-8818 4. LOC Pin Control SEEK, SCAN, AMEM and VF auto-retune operations when the LOC display is lit.
5. SKIN check timing when VF mode is switched from off to on
6. Audio Mute (AMUTE) x Key chattering rejection time (40 ms) y Audio mute lead time and beep output (50 ms) z PLL data and display update processing (30 to 50 ms) { Audio mute trailing time * BAND and M1 to M6 keys, and a VF on to off transition
* VF off to on transition (except for times when DK is disabled, TAPE or CDIN are low, or CD is on)
Note: Item includes checking the SKIN signal.
No. 4743-30/36
LC7233N-8818 * UP, DOWN
* PS (preset scan)
* AMEM, T-UP/DOWN, SEEK, SCAN
* VF auto retune
Note: AMUTE is not output for (a) through (f) when DK is disabled, TAPE or CDIN is low, or CD is on. However, AMUTE is output during a band switch in (a). 7. Mode Changes * For each mode, when: -- -- -- -- -- RADIO on RADIO monitor on/off TAPE in/out CD on/off CDIN = `H' `L' `H'
No. 4743-31/36
LC7233N-8818 * VF off to on (tape and CD in modes)
8. Allowable Scan Direction Display Timing SK display based on SKIN and ST display based on STEREO in FM radio also valid in AM radio mode when the diode matrix AMST SEL setting is 1 and VF modes.
9. ALARM Output (VF mode) If a high level SKIN signal continues for 25 seconds, an alarm signal (the sum of (approximately) 4.4 kHz and (approximately) 2 Hz signals) is output, and a seek up operation is started. (When the diode matrix VF AUTORETUNE setting is 0.)
No. 4743-32/36
LC7233N-8818 10. Beep Output A beep is output for keys that have two functions (M1 to M6, LOUD/RMON, UP/T-UP, DOWN/T-DOWN, V-UP, V-DOWN, BAND/ILL1 and PS/AMEM) so that the user can recognize which key was pressed. The beep is output once (for presses less than 0.5, 1.5 or 2.0 seconds) or twice (for presses longer than 0.5, 1.5 or 2.0 seconds). * One beep
* Two beeps
11. Hold Mode When the clock is enabled and HOLD pin goes from high to low, inputs from the FMIN, AMIN and HCTR pins are disabled. The LC7233N-8818 enters a state where only the clock operates. This is referred to as hold mode.
12. Backup Mode When the clock is disabled and the HOLD pin goes from high to low, inputs from the FMIN, AMIN and HCTR pins are disabled, the 4.5 MHz crystal oscillator is stopped, and the LC7233N-8818 enters low power mode. This is referred to as backup mode.
No. 4743-33/36
LC7233N-8818 13. Timings when Detached
Note: Display data is transferred twice when the LC7233N-8818 is first brought up, and thereafter only when changed by some operation.
* When a power key is used, i.e., the diode matrix POWER SW setting is 1 If the panel is removed and replaced in the power on state, the power is turned off. * When an external power switch is used, i.e., when the diode matrix POWER SW setting is 0 If the panel is removed and replaced in the power on state, the power remains on.
Initial States
RADIO mode TAPE mode * * * * * Band ..........................FM1 (low band edge) MO/ST .......................stereo VF ..............................off LOC ...........................DX (off) * * * * NR B, NR C ...............off APS ...........................off MTL ...........................off * * * * * POWER on, HOLD = `H' (PANEL IN = `L') Volume setting...........-50 dB CD off LOUD ........................off RADIO monitor ..........off MUTE off ...................`L' ILL1 ...........................`L' ILL2 ...........................`H'
Tracking Point Frequency
Area Band FM a, b USA MW a MW b Southeast Asia FM c MW h FM c, d Europe MW c LW a LW b Japan FM e MW e FM b MW f FM f MW g FM g MWc M1 87.5 530 530 87.5 531 87.5 531 153 146 76.0 522 87.5 531 87.5 531 65.0 531 M2 90.1 600 600 90.0 603 90.0 603 160 160 78.6 603 90.1 603 90.1 603 74.0 603 M3 98.1 1000 1000 98.0 999 98.0 999 200 200 83.0 999 98.1 999 98.1 999 87.5 999 M4 106.1 1400 1400 106.0 1404 106.0 1404 260 260 86.6 1404 106.1 1404 106.1 1404 94.0 1404 M5 87.5 530 530 87.5 531 87.5 531 153 146 76.0 522 87.5 531 87.5 531 65.0 531 M6 87.5 530 530 87.5 531 87.5 531 153 146 76.0 522 87.5 531 87.5 531 65.0 531 Last channel 87.5 530 530 87.5 531 87.5 531 153 146 76.0 522 87.5 531 87.5 531 65.0 531
Saudi Arabia
South Africa
East Europe
Note: 1. FM2, FM3 and MW2 load the lower band edge. 2. In Eastern Europe, FM2 and FM3 load 87.5 MHz.
No. 4743-34/36
LC7233N-8818
LC7233N-8818 Detachable System
No. 4743-35/36
LC7233N-8818
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 1995. Specifications and information herein are subject to change without notice. PS No. 4743-36/36

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