Specifications
DESCRIPTION
The 3851 group is the 8-bit microcomputer based on the 740 fam-
ily core technology.
The 3851 group is designed for the household products and office
automation equipment and includes serial I/O functions, 8-bit
timer, A-D converter, and I
2
C-bus interface.
FEATURES
●Basic machine-language instructions ...................................... 71
●Minimum instruction execution time .................................. 0.5 µs
(at 8 MHz oscillation frequency)
●Memory size
ROM ............................................................................. 16 Kbytes
RAM .............................................................................. 512 bytes
●Programmable input/output ports ............................................ 34
●Interrupts ................................................. 16 sources, 16 vectors
●Timers ............................................................................. 8-bit ✕ 4
●Serial I/O....................... 8-bit ✕ 1(UART or Clock-synchronized)
●Multi-master I
2
C-bus interface (option) ....................... 1 channel
●PWM ............................................................................... 8-bit ✕ 1
●A-D converter ............................................... 10-bit ✕ 5 channels
●Watchdog timer ............................................................ 16-bit ✕ 1
●Clock generating circuit ..................................... Built-in 2 circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
3851 Group
(Built-in 16 KB ROM)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PIN CONFIGURATION (TOP VIEW)
Fig. 1 M38513M4-XXXFP/SP pin configuration
●Power source voltage
In high-speed mode .................................................. 4.0 to 5.5 V
(at 8 MHz oscillation frequency)
In high-speed mode .................................................. 2.7 to 5.5 V
(at 4 MHz oscillation frequency)
In middle-speed mode............................................... 2.7 to 5.5 V
(at 8 MHz oscillation frequency)
In low-speed mode .................................................... 2.7 to 5.5 V
(at 32 kHz oscillation frequency)
●Power dissipation
In high-speed mode ..........................................................34 mW
(at 8 MHz oscillation frequency, at 5 V power source voltage)
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
Office automation equipment, FA equipment, Household products,
Consumer electronics, etc.
P40/CNTR1
P41/INT0
P42/INT1
P43/INT2
AV
SS
P44/INT3/PWM
V
REF
VCC
P31/AN1
P32/AN2
P0
0
P04
P05
P06
P07
P11
P12
P13/(LED0)
P1
4/(LED1)
P1
5/(LED2)
P1
0
P01
P02
P30/AN0
P33/AN3
P34/AN4
P03
40
41
42
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
33
3
2
1
21
20
19
18
17
16
15
14
13
12
11
9
8
7
6
5
4
10
M38513M4-XXXFP
M38513M4-XXXSP
P16/(LED3)
P1
7/(LED4)
P2
7/CNTR0/SRDY
P26/SCLK
P25/SCL2/TxD
P2
4/SDA2/RxD
P2
3/SCL1
P22/SDA1
CNVSS
P21/XCIN
P20/XCOUT
RESET
X
IN
XOUT
VSS
Package type : FP ........................... 42P2R-A/E (42-pin plastic-molded SSOP)
Package type : SP ........................... 42P4B (42-pin shrink plastic-molded DIP)
✽This data sheet explains the products which have
16 KB
ROM.