SM3512

SM3512 SM3512 DESCRIPTION The SM3512 is a CMOS 4-bit single-chip microcomputer for databank incorporating data memory RAM, LCD driver, key/switch input circuit, 8-bit parallel I/O port, 2 output ports, external memory control circuit, and buzzer output circuit. 4-Bit Single-Chip Microcomputer (For Data Bank Use) FEATURES • ROM capacity : Program ROM 8 k x 23 bits Character ROM 5 x 9 x 128 bits Constant ROM 208 x 4 bits • RAM capacity : Working RAM 256 x 4 bits Display RAM 60 x 9 bits Data RAM 8 k x 8 bits • Memory expansion (external) : 8 k x 8 bits • LCD display : 60-segment x 9-common • I/O ports : Parallel I/O 8 bits Input 1 bit Output 2 bits Buzzer output 1 bit (4 kHz) Key input 6 bits • Standby release : 2 events (2 Hz signal, key input) • Built-in oscillator : System clock (built-in CR oscillator) 250 kHz Timer (built-in CR oscillator) 32.8 kHz (external crystal) 32.768 kHz • Instruction cycle time : 12 µs • Operating temperature : –10 to +60°C • 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- SM3512 SYSTEM COMFIGURATION EXAMPLE Common signal Segment signal CE CE S1-S60 H1-H9 VB S7-S19 Expand memory 8 k-byte RW DIO1-DIO8 VM SM3512 VA EO1 EO2 Individual output KI2-KI7 KI1 XCR VCC TEST RESET XI XO BZ VCC ON Key + – RESET VCC Key matrix S1-S6 S53-S60 (MAX. 84-key) Key 3V Buzzer -2- SM3512 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