38C5 Group
REJ03B0028-0110Z
Rev.1.10
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Jun 14, 2004
DESCRIPTION
ꢀLCD drive control circuit
The 38C5 group is the 8-bit microcomputer based on the 740 family
Bias ................................................................................... 1/2, 1/3
Duty ......................................................... Static, 1/2, 1/3, 1/4, 1/8
Common output ....................................................................... 4/8
Segment output ................................................................... 32/36
ꢀMain clock generating circuit ...................................................... 1
(connect to external ceramic resonator or on-chip oscillator)
ꢀSub-clock generating circuit ........................................................ 1
(connect to external quartz-crystal oscillator)
core technology.
The 38C5 group has an LCD drive control circuit, an A/D converter,
and a serial I/O as additional functions.
The various microcomputers in the 38C5 group include variations of
internal memory type, memory size, and packaging. For details, re-
fer to the section on part numbering.
FEATURES
ꢀPower source voltage
ꢀBasic machine-language instructions ....................................... 71
ꢀThe minimum instruction execution time .......................... 0.32 µs
(at 12.5 MHz oscillation frequency)
In high-speed mode (f(XIN) = 12.5 MHz) .................... 4.5 to 5.5 V
In high-speed mode (f(XIN) = 8.0 MHz) ...................... 4.0 to 5.5 V
In middle-speedmode (f(XIN) = 6.0 MHz) .................... 1.8 to 5.5 V
In low-speed mode ..................................................... 1.8 to 5.5 V
ꢀPower dissipation (Mask ROM version)
ꢀMemory size
ROM ................................................................ 32 K to 60 K bytes
RAM ............................................................... 1536 to 2048 bytes
ꢀProgrammable input/output ports ......... 59 (common to SEG: 36)
ꢀInterrupts ................................................... 17 sources, 16 vectors
(Key input interrupt included)
• In high-speed mode ................................................. Typ. 32 mW
(VCC = 5 V, f(XIN) = 12.5 MHz, Ta = 25°C)
• In low-speed mode ................................................... Typ. 18 µW
(VCC = 2.5 V, f(XIN) = stop, f(XCIN) = 32 kHz, Ta = 25°C)
ꢀOperating temperature range ................................... – 20 to 85°C
ꢀTimers ............................................................8-bit ꢀ 4, 16-bit ꢀ 2
ꢀSerial I/O1 ...................... 8-bit ꢀ 1 (UART or Clock-synchronized)
ꢀSerial I/O2 .....................................8-bit ꢀ 1 (Clock-synchronized)
ꢀPWM .................. 10-bit ꢀ 2, 16-bit ꢀ 1 (common to IGBT output)
ꢀA/D converter ................................................. 10-bit ꢀ 8 channels
(A/D converter can be operated in low-speed mode.)
ꢀWatchdog timer ............................................................... 8-bit ꢀꢀ1
ꢀ LED direct drive port .................................................................. 6
(average current: 15 mA, peak current: 30 mA, total current: 90 mA)
APPLICATION
Household products, Consumer electronics, etc.
Rev.1.10 Jun 14, 2004 page 1 of 73