MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
ꢀPower source voltage
DESCRIPTION
In high-speed mode .................................................. 4.0 to 5.5 V
(at 8 MHz oscillation frequency)
The 3850 group (spec. H) is the 8-bit microcomputer based on the
740 family core technology.
In middle-speed mode............................................... 2.7 to 5.5 V
(at 8 MHz oscillation frequency)
The 3850 group (spec. H) is designed for the household products
and office automation equipment and includes serial I/O functions,
8-bit timer, and A-D converter.
In low-speed mode .................................................... 2.7 to 5.5 V
(at 32 kHz oscillation frequency)
ꢀPower dissipation
FEATURES
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
ꢀBasic machine-language instructions ...................................... 71
ꢀMinimum instruction execution time .................................. 0.5 µs
(at 8 MHz oscillation frequency)
ꢀMemory size
ROM ................................................................... 8K to 32K bytes
RAM ................................................................. 512 to 1024 bytes
ꢀProgrammable input/output ports ............................................ 34
ꢀInterrupts ................................................. 15 sources, 14 vectors
ꢀTimers ............................................................................. 8-bit ꢀ 4
ꢀSerial I/O1 .................... 8-bit ꢀ 1(UART or Clock-synchronized)
ꢀSerial I/O2 ................................... 8-bit ꢀ 1(Clock-synchronized)
ꢀ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)
APPLICATION
Office automation equipment, FA equipment, Household products,
Consumer electronics, etc.
PIN CONFIGURATION (TOP VIEW)
P3
P3
P3
P3
P3
P0
P0
P0
P0
P0
P0
P0
P0
P1
P1
P1
P1
P1
P1
P1
P1
0
1
2
3
4
/AN
/AN
/AN
/AN
/AN
0
1
2
3
4
V
CC
1
2
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
VREF
AVSS
/PWM
2/SCMP2
/INT
/INT
3
P4
4
/INT
/INT
P4
P4
P4
/CNTR
P2
P2
P2
3
4
P4
3
5
2
1
0
1
0/SIN2
6
1
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
/SOUT2
/SCLK2
/SRDY2
7
0
/CNTR
/SRDY1
8
P2
7
0
9
6
/SCLK
/TxD
/RxD
P2
P2
10
11
12
13
14
15
16
17
18
19
20
21
5
4
3
2
/(LED
/(LED
/(LED
/(LED
/(LED
/(LED
/(LED
/(LED
0)
1)
2)
3)
4)
5)
6)
7)
CNVSS
P2 /XCIN
P2 /XCOUT
VPP
1
0
RESET
X
IN
OUT
SS
X
V
: Flash memory version
Package type : FP ........................... 42P2R-A/E (42-pin plastic-molded SSOP)
Package type : SP ........................... 42P4B (42-pin plastic-molded SDIP)
Fig. 1 M38503MXH-XXXFP/SP pin configuration