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| SM3514 SM3514 DESCRIPTION The SM3514 is a CMOS 4-bit single-chip microcomputer for databank incorporating data memory RAM, LCD driver, key input circuits and buzzer output circuit. By connecting an external crystal, a 1 Hz timer interrupt is made possible for easier clock function. 4-Bit Single-Chip Microcomputer (For Data Bank Use) FEATURES * ROM capacity : Program ROM 8 k x 23 bits Character ROM 5 x 8 x 128 bits * RAM capacity : Working RAM 256 x 4 bits Display RAM 60 x 8 bits Data RAM 512 x 8 bits * LCD display : 60 - segment x 8 - common * I/O ports : Buzzer output 1 bit (4 kHz) Key input 7 bits * Standby release : 2 events (2 Hz signal, key input) * Built-in oscillator : System clock (built-in CR oscillator) 300 kHz Timer (built-in CR oscillator) 32.8 kHz (external crystal) 32.768 kHz * Instruction cycle time : 10 s * Operating temperature : -10 to +60C * Supply voltage : 2.5 to 3.4 V * Package : 100-pin QFP (QFP100-P-1420) In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device. -1- SM3514 SYSTEM COMFIGURATION EXAMPLE Common signal Segment signal S1-S60 H1-H8 Key matrix S1-S6 S53-S60 KI2-KI7 (MAX. 84-Key) SM3514 XCR KI1 VCC TEST RESET XI XO BZ VCC ON Key 3V + - RESET VCC Key Buzzer -2- SM3514 100 QFP (QFP100-P-1420) 0.15 0.05 80 (2.4) 81 51 0.65TYP. 50 18.8 0.4 14.0 0.2 100 (2.4) 1 (2.4) 20.0 24.8 0.2 0.4 30 (2.4) 0.15 31 M 0.3 0.1 1.3 0.2 2.75 0.2 0.1 0.1 Package base plane (22.98) -3- (16.98) 0.15 |
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