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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 s
(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, P61 to P65, P7, P84 to P87, 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
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
P2
0
/B
UZ02
/FLD
0
P2
1
/FLD
1
P2
2
/FLD
2
P2
3
/FLD
3
P2
4
/FLD
4
P2
5
/FLD
5
P2
6
/FLD
6
P2
7
/FLD
7
P0
0
/FLD
8
P0
3
/FLD
11
P0
4
/FLD
12
P0
5
/FLD
13
P0
6
/FLD
14
P0
7
/FLD
15
P1
1
/FLD
17
P1
2
/FLD
18
P1
3
/FLD
19
P1
4
/FLD
20
P1
5
/FLD
21
P1
6
/FLD
22
P1
7
/FLD
23
P7
1
/AN
1
P7
0
/AN
0
P65/SSTB1/AN11
P64/INT4/SBUSY1/AN10
M38B57MC-XXXFP
P6
0
/CNTR
1
P63/AN9
P62/SRDY1/AN8
RESET
P9
1
/X
COUT
P9
0
/X
CIN
P4
4
/PWM
1
P4
3
/B
UZ01
P4
2
/INT
3
P4
1
/INT
1
P4
0
/INT
0
VEE
P7
5
/AN
5
P76/AN6
P77/AN7
VREF
AVSS
P50/SIN1
P51/SOUT1
P52/SCLK11
P53/SCLK12
P54/RxD
P55/TxD
P56/SCLK21
P57/SRDY2/SCLK22
P8
7
/PWM
0
/FLD
39
P86/RTP1/FLD38
P83/FLD35
P82/FLD34
P81/FLD33
P80/FLD32
P37/FLD31
P36/FLD30
P35/FLD29
P34/FLD28
P33/FLD27
P32/FLD26
P31/FLD25
P30/FLD24
P85/RTP0/FLD37
P6
1
/CNTR
0
/CNTR
2
P4
5
/T
1OUT
X
IN
X
OUT
Vcc
P4
6
/T
3OUT
Vss
P1
0
/FLD
16
P0
1
/FLD
9
P0
2
/FLD
10
P4
7
/INT
2
P84/FLD36
P7
4
/AN
4
P7
3
/AN
3
P7
2
/AN
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 (XIN–XOUT) ......................... Internal feedback resistor
Sub-clock (XCIN–XCOUT) ......... 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 W
(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.
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.