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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.

DESCRIPTION

The SM3514 is a CMOS 4-bit single-chip micro-

computer for databank incorporating data memory

RAM, LCD driver, key input circuits and buzzer out-

put circuit. By connecting an external crystal, a 1 Hz

timer interrupt is made possible for easier clock

function.

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 :

• Instruction cycle time : 10 µs

• Operating temperature : –10 to +60°C

• Supply voltage : 2.5 to 3.4 V

• Package : 100-pin QFP (QFP100-P-1420)

SM3514

SM3514

4-Bit Single-Chip Microcomputer

(For Data Bank Use)

System clock (built-in CR oscillator) 300 kHz

Timer (built-in CR oscillator)

32.8 kHz

(external crystal)

32.768 kHz