DESCRIPTION
The 38B5 group is the 8-bit microcomputer based on the 740 family
core technology.
The 38B5 group has six 8-bit timers, a 16-bit timer, a fluorescent
display automatic display circuit, 12-channel 10-bit A-D converter, a
serial I/O with automatic transfer function, which are available for
controlling musical instruments and household appliances.
The 38B5 group has variations of internal memory size and packag-
ing. For details, refer to the section on part numbering.
For details on availability of microcomputers in the 38B5 group, refer
to the section on group expansion.
MITSUBISHI MICROCOMPUTERS
38B5 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FEATURES
Basic machine-language instructions ....................................... 71
The minimum instruction execution time .......................... 0.48 μs
(at 4.19 MHz oscillation frequency)
Memory size
ROM............................................. 24K to 60K bytes
RAM ............................................ 512 to 2048 bytes
Programmable input/output ports .............................................55
High-breakdown-voltage output ports....................................... 36
Software pull-up resistors ......
(Ports P5, P6
1
to P6
5
, P7, P8
4
to P8
7
, P9)
Interrupts .................................................. 21 sources, 16 vectors
Timers ........................................................... 8-bit
6, 16-bit
1
Serial I/O1 (Clock-synchronized) .................................... 8-bit
1
......................(max. 256-byte automatic transfer function)
Serial I/O2 (UART or Clock-synchronized)..................... 8-bit
1
Fig. 1 Pin Configuration of M38B57MC-XXXFP
Package type : 80P6N-A
80-pin plastic-molded QFP
PIN CONFIGURATION (TOP VIEW)
1
2
3
4
5
6
7
8
9
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
P
0
/
U
/
0
P
1
/
1
P
2
/
2
P
3
/
3
P
4
/
4
P
5
/
5
P
6
/
6
P
7
/
7
P
0
/
8
P
3
/
1
P
4
/
1
P
5
/
1
P
6
/
1
P
7
/
1
P
1
/
1
P
2
/
1
P
3
/
1
P
4
/
2
P
5
/
2
P
6
/
2
P
7
/
2
P
1
/
1
P
0
/
0
P6
5
/S
STB1
/AN
11
P6
4
/INT
4
/S
BUSY1
/AN
10
M38B57MC-XXXFP
P
0
/
1
P6
3
/AN
9
P6
2
/S
RDY1
/AN
8
P7
7
/AN
7
R
P
1
/
C
P
0
/
C
P
4
/
1
P
3
/
U
P
2
/
3
P
1
/
1
P
0
/
0
V
EE
P8
4
/FLD
36
P
5
/
5
P7
6
/AN
6
V
REF
AV
SS
P5
0
/S
IN1
P5
1
/S
OUT1
P5
2
/S
CLK11
P5
3
/S
CLK12
P5
4
/RxD
P5
5
/TxD
P5
6
/S
CLK21
P5
7
/S
RDY2/
S
CLK22
P
7
/
0
/
3
P8
6
/RTP
1
/FLD
38
P8
3
/FLD
35
P8
2
/FLD
34
P8
1
/FLD
33
P8
0
/FLD
32
P3
7
/FLD
31
P3
6
/FLD
30
P3
5
/FLD
29
P3
4
/FLD
28
P3
3
/FLD
27
P3
2
/FLD
26
P3
1
/FLD
25
P3
0
/FLD
24
P8
5
/RTP
0
/FLD
37
P
1
/
0
/
2
P
5
/
1
X
I
X
O
V
P
6
/
3
V
P
0
/
1
P
1
/
9
P
2
/
1
P
7
/
2
P
4
/
4
P
3
/
3
P
2
/
2
PWM .............................................................................14-bit
1
8-bit
1 (also functions as timer 6)
A-D converter.............................................. 10-bit
12 channels
Fluorescent display function ........................ Total 40 control pins
Interrupt interval determination function ..................................... 1
Watchdog timer.............................................................20-bit
1
Buzzer output............................................................................. 1
2 Clock generating circuit
Main clock (X
IN
–X
OUT
) ......................... Internal feedback resistor
Sub-clock (X
CIN
–X
COUT
) ......... Without internal feedback resistor
(
connect to external ceramic resonator or quartz-crystal oscillator
)
Power source voltage
In high-speed mode ................................................... 4.0 to 5.5 V
(at 4.19 MHz oscillation frequency and high-speed selected)
In middle-speed mode ............................................... 2.7 to 5.5 V
(at 4.19 MHz oscillation frequency and middle-speed selected)
In low-speed mode .................................................... 2.7 to 5.5 V
(at 32 kHz oscillation frequency and low-speed selected)
Power dissipation
In high-speed mode .......................................................... 35 mW
(at 4.19 MHz oscillation frequency)
In low-speed mode ............................................................ 60 μW
(at 32 kHz oscillation frequency, at 3 V power source voltage)
Operating temperature range ...................................–20 to 85 °C
APPLICATION
Musical instruments, VCR, household appliances, etc.
PRELIMINARY
Notice: This s not a final specification.
Some parametric imits are subject to change.