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 1Hz 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 :
● 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 µs
●• Operating temperature : –10 to +60°C
●• Supply voltage : 2.5 to 3.4 V
●• Package : 100-pin QFP (QFP100-P-1420)
