MITSUBISHI MICROCOMPUTERS
38C3 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
●LCD drive control circuit
DESCRIPTION
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
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.
(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
For details on availability of microcomputers in the 38C3 group, refer
to the section on group expansion.
FEATURES
In high-speed mode ...........................................................32 mW
(at 8 MHz oscillation frequency)
●Basic machine-language instructions ....................................... 71
●The minimum instruction execution time ............................. 0.5 µs
(at 8MHz oscillation frequency)
In low-speed mode..............................................................45 µW
(at 32 kHz oscillation frequency, at 3 V power source voltage)
●Operating temperature range.................................... – 20 to 85°C
●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
APPLICATIONS
Camera, household appliances, consumer electronics, etc.
..................................................... (Ports P0–P8 except Port P51)
●Interrupts ................................................... 16 sources, 16 vectors
(includes key input interrupt)
●Timers ............................................................8-bit ✕ 6, 16-bit ✕ 1
●A-D converter ................................................. 10-bit ✕ 8 channels
●Serial I/O .......................................8-bit ✕ 1 (Clock-synchronized)
PIN CONFIGURATION (TOP VIEW)
P47/SRDY
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
P30/SEG24
P31/SEG25
P32/SEG26
P33/SEG27
P34/SEG28
P35/SEG29
P36/SEG30
P37/SEG31
COM0
COM1
COM2
COM3
VL1
P46/SCLK1
P45/SOUT
P44/SIN
P43/φ
P42/T3OUT
P41/T1OUT
P40/SCLK2
M38C34M6AXXXFP
AVSS
VREF
P67/AN7
P66/AN6
P65/AN5
P64/AN4
P63/AN3
P62/AN2
VL2
VL3
P80
Package type : 80P6N-A
80-pin plastic-molded QFP
Fig. 1 M38C34M6AXXXFP pin configuration