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| IN87C51N CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER WITH 4K BYTES OF EPROM MEMORY The 87C51 is the EPROM version of the 80C51. Microcontroller fabricated with highdensity CMOS technology. It contains 4K bytes of on chip Program memory that can be electrically programmed The 80C51 contains a 4k x 8 ROM , a 128 x 8 RAM , 32 I/O lines, two 16-bit counter/timers, a five-source, two-priority level nested interrupt structure, a serial I/O port for either multi-processor communications, I/O expansion or full duplex UART, and on-chip oscillator and clock circuits. The device has two software selectable modes of power reduction idle mode and power-down mode. The idle mode freezes the CPU while allowing the RAM, timers, serial port, and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative. FEATURES 8031/8051 compatible 4K EPROM 128 x 8 RAM Two 16-bit counter/timers Full duplex serial channel Boolean processor Memory addressing capability 64k ROM and 64k RAM Power control modes: Idle mode Power-down mode CMOS and TTL compatible Two speed ranges at VCC=5V 12 MHz 16 MHz (MCS-51 family) PIN CONFIGURATIONS P 1 .0 P 1 .1 P 1 .2 P 1 .3 P 1 .4 P 1 .5 P 1 .6 P 1 .7 R ST R x D /P 3 .0 T x D /P 3 .2 I N T 0 /P 3 .2 I N T 1 /P 3 .3 T 0 /P 3 .4 T 1 /P 3 .5 W R /P 3 6 R D /P 3 .7 XTAL2 XTAL1 V ss 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 P L A S T IC DUAL IN - L IN E PAC KAGE 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 V cc P 0 .0 /A D 0 P 0 .1 /A D 1 P 0 .2 /A D 2 P 0 .3 /A D 3 P 0 .4 /A D 4 P 0 .5 /A D 5 P 0 .6 /A D 6 P 0 .7 /A D 6 E A /V p r A L E /P P O G PSE N P 2 .7 /A 1 5 P 2 .6 /A 1 4 P 2 .5 /A 1 3 P 2 .4 /A 1 2 P 2 .3 /A 1 1 P 2 .2 /A 1 0 P 2 .1 /A 9 P 2 .0 /A 8 1 IN87C51N CMOS single-chip 8-bit microcontroller 87C51 DC ELECTRICAL CHARACTERISTICS FOR INTEGRAL DEVICES T=-10 oC to + 70oC; Vcc= 5V 10% Parameter Symbol Vcc Icc Icc1 Ipd Vil Vili Vih Vih1 -Iil Itl Ili Vol Vol1 Voh Supply current operating, mA Idle mode current, mA Pover-down current, mkA LOW level input voltage, V (exept EA) LOW level input voltage, V (for EA) HIGH level input voltage, V (exept XTAL1, RST) HIGH level input voltage, V (for XTAL1, RST) Input current logic 1, mkA (Ports 1, 2 and 3) Input current logic 1 to 0, mkA (Ports 1, 2 and 3) Input leacage current, mkA (Port 0, EA) LOW level output voltage, V (Ports 1, 2 and 3) LOW level output voltage, V (Ports 0, ALE, PSEN) HIGH level output voltage, V (Ports 1, 2 and 3) HIGH level output voltage, V (Ports 0, ALE, PSEN) RST pull-down resistor, kOm I/O pin capasitance, pF Test conditions Vcc = 5,5 V Fclc = 12MHz Vcc = 5,5 V Fclc = 12MHz 2VVpdVcc max INPUTS: Min 4,5 -0,5 0 0,2Vcc +0,9 0,7Vcc Vi=0,45 V Vi=2 V 0,45VViVcc OUTPUTS: Iol = 1,6 mA Iol = 3,2 mA -Ioh=60 mkA -Ioh=25 mkA -Ioh=10 mkA -Ioh=800 mkA -Ioh=300 mkA -Ioh=80 mkA test frecuency=1MHz Limits Max 5,5 25 4,0 50 0.2Vcc-0,1 0.2Vcc-0,3 Vcc+0,5 Vcc+0,5 -50 -650 10 2,4 0,75Vcc 0,9Vcc 2,4 0,75Vcc 0,9Vcc 50 - 0,45 0,45 - Voh1 - Rrst Ci/0 300 10 AC ELECTRICAL CHARACTERISTICS FOR INTEGRAL DEVICES T=-10 oC to + 70oC; Vcc= 5V 10% Symbol Fclc Parameter Variable Oscillator Min Max Oscillator Frequency: 3,5 12 3,5 16 Unit IN87C51N - 12 IN87C51N - 16 MHz MHz 2 |
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