DESCRIPTION
●The SM3517 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.
●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 2 k x 8 bits
●• Memory expansion (external) : 32 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)
● [Test Sample only]
