DESCRIPTION
The 38C8 group is the 8-bit microcomputer based on the 740 family core technology.
The 38C8 group has a LCD drive control circuit (bias control, time sharing control), a 10-bit A-D converter, and a Serial I/O as additional functions.
The various microcomputers in the 38C8 group include variations of internal memory size and packaging. For details, refer to the section on part numbering.

FEATURES
● Basic machine-language instructions ....................................... 71
● The minimum instruction execution time ............................ 0.5 µs
                                                        (at 8 MHz oscillation frequency)
● Memory size
   ROM ............................................................................ 60 K bytes
   RAM ............................................................................ 2048 bytes
● Programmable input/output ports ............................................. 35
● Software pull-up resistors
   .................................................................. Ports P0–P3, P41–P47
● Interrupts ................................................... 15 sources, 15 vectors
                                                              (includes key input interrupt)
● Timers ............................................................8-bit ✕ 3, 16-bit ✕ 2
● Serial I/O ........................ 8-bit ✕ 1 (UART or Clock-synchronized)
● A-D converter (32 kHz operating available) ... 10-bit ✕ 8 channels
● LCD drive control circuit
   Bias ................................................................................... 1/5, 1/7
   Duty .............................................................................. 1/16, 1/32
   Common output ............................................................... 16 or 32
   Segment output ............................................................... 52 or 68
● Main clock generating circuit (RC oscillation selectable)
   ...................... (connect to external ceramic resonator or resistor)
● Sub-clock generating circuit
   ............................................. (connect to quartz-crystal oscilaltor)
● Power source voltage
   In high-speed mode .................................................... 4.0 to 5.5 V
   In middle-speed mode ................................................ 2.2 to 5.5 V
   In low-speed mode ..................................................... 2.2 to 5.5 V
● Power dissipation
   In high-speed mode ........................................................... 30 mW
      (at 8 MHz oscillation frequency, at 5 V power source voltage)
   In low-speed mode ............................................................. 60 µW
      (at 32 kHz oscillation frequency, at 3 V power source voltage, at
      WIT state, at voltage multiplier operating, LCD drive waveform
      generating state)
● Operating temperature range ................................... – 20 to 85°C