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3851 Group
(Built-in 24 KB or more ROM)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
DESCRIPTION
The 3851 group (built-in 24 KB or more ROM) is the 8-bit micro-
computer based on the 740 family core technology.
The 3851 group (built-in 24 KB or more ROM) is designed for the
household products and office automation equipment and includes
serial I/O functions, 8-bit timer, I2C-bus interface, and A-D con-
verter.
FEATURES
qBasic machine-language instructions ...................................... 71
qMinimum instruction execution time .................................. 0.5
s
(at 8 MHz oscillation frequency)
qMemory size
ROM ................................................................. 24K to 32K bytes
RAM ..................................................................... 640 to 1K bytes
qProgrammable input/output ports ............................................ 34
qInterrupts ................................................. 17 sources, 16 vectors
qTimers ............................................................................. 8-bit 4
qSerial I/O1 .................... 8-bit 1(UART or Clock-synchronized)
qSerial I/O2 ................................... 8-bit 1(Clock-synchronized)
qMulti-master I2C-bus interface (option) ....................... 1 channel
qPWM ............................................................................... 8-bit 1
qA-D converter ............................................... 10-bit 5 channels
qWatchdog timer ............................................................ 16-bit 1
PIN CONFIGURATION (TOP VIEW)
Fig. 1 M38517M8-XXXFP/SP pin configuration
qClock generating circuit ..................................... Built-in 2 circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
qPower source voltage
In high-speed mode .................................................. 4.0 to 5.5 V
(at 8 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)
qPower dissipation
In high-speed mode .......................................................... 34 mW
(at 8 MHz oscillation frequency, at 5 V power source voltage)
In low-speed mode
Except M38517F8FP/SP ................................................... 60
W
M38517F8FP/SP ............................................................. 450
W
(at 32 kHz oscillation frequency, at 3 V power source voltage)
qOperating temperature range .................................... –20 to 85°C
APPLICATION
Office automation equipment, FA equipment, Household products,
Consumer electronics, etc.
Package type : FP ........................... 42P2R-A/E (42-pin plastic-molded SSOP)
Package type : SP ........................... 42P4B (42-pin plastic-molded SDIP)
P40/CNTR1
P41/INT0
P42/INT1
P43/INT2/SCMP2
P44/INT3/PWM
VREF
VCC
P31/AN1
P32/AN2
P00/SIN2
P04
P05
P06
P07
P11/(LED1)
P12/(LED2)
P13/(LED3)
P14/(LED4)
P15/(LED5)
P10/(LED0)
P01/SOUT2
P02/SCLK2
P30/AN0
P33/AN3
P34/AN4
P03/SRDY2
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
M
3
8
5
1
7
M
8
-X
X
F
P
/S
P
P16/(LED6)
P17/(LED7)
P27/CNTR0/SRDY1
P26/SCLK1
P25/SCL2/TxD
P24/SDA2/RxD
P23/SCL1
P22/SDA1
CNVSS
P21/XCIN
P20/XCOUT
RESET
XIN
XOUT
VSS
AVSS
This data sheet explains the products which have
24 KB or more
ROM.
1