38C3

Basic machine-language instructions ...................................71
The minimum instruction execution time ............................. 0.5 ms (at 8MHz oscillation frequency)
Memory size
    ROM .....................................................................................4 K to 48 K bytes
    RAM ......................................................................................192 to 1024 bytes
Programmable input/output ports ........................................57
Software pull-up/pull-down resistors................................... (Ports P0P8 except Port P51)
Interrupts ............................................................................ 16 sources, 16 vectors (includes key input interrupt)
Timers ................................................................................ ..8-bit 5 6, 16-bit 5 1
A-D converter .......................................................................10-bit 5 8 channels
Serial I/O ..............................................................................8-bit 5 1 (Clock-synchronized)
LCD drive control circui
    Bias ......................................................................................1/1, 1/2, 1/3
    Duty .................................................................................... 1/1, 1/2, 1/3, 1/4
    Common output ...................................................................4
    Segment output ...................................................................32
2 Clock generating circuit (connect to external ceramic resonator or quartz-crystal oscillator)
Power source voltage
    In high-speed mode .............................................................4.0 to 5.5 V
    In middle-speed mode ..........................................................2.5 to 5.5 V
    In low-speed mode ...............................................................2.5 to 5.5 V
Power dissipation
    In high-speed mode ..............................................................32 mW (at 8 MHz oscillation frequency)
    In low-speed mode .............................................................. 45 mW (at 32 kHz oscillation frequency, at 3 V power source voltage)
Operating temperature range ............................................... 20 to 85°C

The 38C3 group is the 8-bit microcomputer based on the 740 family core technology.

The 38C3 group has a LCD drive control circuit, a 10-channel A-D converter, and a Serial I/O as additional functions.

The various microcomputers in the 38C3 group include variations of internal memory size and packaging. For details, refer to the section on part numbering.

For details on availability of microcomputers in the 38C3 group, refer to the section on group expansion.