DESCRIPTION
The 38C5 group is the 8-bit microcomputer based on the 740 family
core technology.
The 38C5 group has an LCD drive control circuit, an A/D converter,
and a serial interface as additional functions.
The various microcomputers in the 38C5 group include variations of
internal memory type, memory size, and packaging.
This data sheet has described only the One Time PROM version of
38C5 group. Refer to “38C5 Group Datasheet” about products other
than the One Time PROM version.
FEATURES
qBasic machine-language instructions ....................................... 71
qThe minimum instruction execution time .......................... 0.67
s
(at 6 MHz oscillation frequency)
qMemory size
ROM ............................................................................ 60 K bytes
RAM ............................................................................ 2048 bytes
qProgrammable input/output ports ......... 59 (common to SEG: 32)
qInterrupts ................................................... 17 sources, 16 vectors
(Key input interrupt included)
qTimers ............................................................ 8-bit 4, 16-bit 2
qSerial interface
Serial I/O1 ...................... 8-bit 1 (UART or Clock-synchronized)
Serial I/O2 ..................................... 8-bit 1 (Clock-synchronized)
qPWM .................. 10-bit 2, 16-bit 1 (common to IGBT output)
qA/D converter ................................................. 10-bit 8 channels
(A/D converter can be operated in low-speed mode.)
qWatchdog timer ............................................................... 8-bit 1
q LED direct drive port .................................................................. 6
(average current: 15 mA, peak current: 30 mA, total current: 90 mA)
qLCD drive control circuit
Bias ................................................................................... 1/2, 1/3
Duty ......................................................... Static, 1/2, 1/3, 1/4, 1/8
Common output ....................................................................... 4/8
Segment output ................................................................... 32/36
qMain clock generating circuit ...................................................... 1
(connect to external ceramic resonator or on-chip oscillator)
qSub-clock generating circuit ........................................................ 1
(connect to external quartz-crystal oscillator)
qPower source voltage
In high-speed mode (f(XIN) = 6 MHz) ......................... 3.0 to 3.6 V
In high-speed mode (f(XIN) = 4 MHz) ......................... 2.0 to 3.6 V
In middle-speedmode (f(XIN) = 6 MHz) ....................... 1.8 to 3.6 V
In low-speed mode ..................................................... 1.8 to 3.6 V
qPower dissipation (Mask ROM version)
In high-speed mode ................................................. Typ. 15 mW
(VCC = 2.5 V, f(XIN) = 4 MHz, Ta = 25°C)
In low-speed mode ................................................... Typ. 18
W
(VCC = 2.5 V, f(XIN) = stop, f(XCIN) = 32 kHz, Ta = 25°C)
qOperating temperature range ................................... – 20 to 85°C
APPLICATION
Household products, Consumer electronics, etc.
Rev.2.00
Nov 23, 2005
page 1 of 75
REJ03B0098-0200
38C5 Group (One Time PROM version)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0098-0200
Rev.2.00
Nov 23, 2005