Rev.2.00
May 28, 2004
page 1 of 100
38C2 Group (A Version)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0096-0200Z
Rev.2.00
May 28, 2004
DESCRIPTION
The 38C2 group (A version) is the 8-bit microcomputer based on the
740 family core technology.
The 38C2 (A version) group has an LCD drive control circuit, a 10-
channel A-D converter, and a serial I/O as additional functions.
The various microcomputers in the 38C2 group (A version) include
variations of internal memory size and packaging. For details, refer
to the section on part numbering.
FEATURES
qBasic machine-language instructions ....................................... 71
qThe minimum instruction execution time .......................... 0.40
s
(at 10 MHz oscillation frequency)
qMemory size
ROM ................................................................ 16 K to 60 K bytes
RAM ................................................................. 640 to 2048 bytes
qProgrammable input/output ports ......... 51 (common to SEG: 24)
qInterrupts ................................................... 18 sources, 16 vectors
qTimers ............................................................ 8-bit 4, 16-bit 2
qA-D converter ................................................. 10-bit 8 channels
qSerial I/O ........................ 8-bit 2 (UART or Clock-synchronized)
qPWM .................. 10-bit 2, 16-bit 1 (common to IGBT output)
qLCD drive control circuit
Bias ................................................................................... 1/2, 1/3
Duty ........................................................................... 1/2, 1/3, 1/4
Common output .......................................................................... 4
Segment output ........................................................................ 24
qTwo clock generating circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
q Watchdog timer ............................................................... 8-bit 1
q LED direct drive port .................................................................. 8
(average current: 15 mA, peak current: 30 mA, total current: 90 mA)
q Power source voltage
Mask ROM version
In frequency/2 mode ................................................... 4.5 to 5.5 V
(at 10 MHz oscillation frequency)
In frequency/2 mode ................................................... 4.0 to 5.5 V
(at 8 MHz oscillation frequency)
In frequency/4 mode ................................................... 1.8 to 5.5 V
(at 4 MHz oscillation frequency, A-D operation excluded)
In low-speed mode ..................................................... 1.8 to 5.5 V
(at 32 kHz oscillation frequency)
Flash memory version
In frequency/2 mode ................................................... 4.5 to 5.5 V
(at 10 MHz oscillation frequency)
In frequency/2 mode ................................................... 4.0 to 5.5 V
(at 8 MHz oscillation frequency)
In frequency/4 mode ................................................... 2.5 to 5.5 V
(at 8 MHz oscillation frequency)
In low-speed mode ..................................................... 2.5 to 5.5 V
(at 32 kHz oscillation frequency)
q Power dissipation
In frequency/2 mode (at 8 MHz oscillation frequency, VCC = 5 V)
Mask ROM version ............................................................ 14 mW
Flash memory version ....................................................... 25 mW
In low-speed mode (at 32 kHz oscillation frequency, VCC = 3 V)
Mask ROM version ............................................................. 24
W
Flash memory version ...................................................... 375
W
q Operating temperature range ................................... – 20 to 85°C