3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
DESCRIPTION
The 3850 group (spec. H) is the 8-bit microcomputer based on the
740 family core technology.
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.
FEATURES
a71Basic machine-language instructions ...................................... 71
a71Minimum instruction execution time .................................. 0.5 µs
(at 8 MHz oscillation frequency)
a71Memory size
ROM ................................................................... 8K to 32K bytes
RAM ................................................................. 512 to 1024 bytes
a71Programmable input/output ports ............................................ 34
a71Interrupts ................................................. 15 sources, 14 vectors
a71Timers ............................................................................. 8-bit ✕ 4
a71Serial I/O1 .................... 8-bit ✕ 1(UART or Clock-synchronized)
a71Serial I/O2 ................................... 8-bit ✕ 1(Clock-synchronized)
a71PWM ............................................................................... 8-bit ✕ 1
a71A-D converter ............................................... 10-bit ✕ 5 channels
a71Watchdog timer ............................................................ 16-bit ✕ 1
PIN CONFIGURATION (TOP VIEW)
Fig. 1 M38503MXH-XXXFP/SP pin configuration (spec. H)
a71Clock generating circuit ..................................... Built-in 2 circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
a71Power 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)
a71Power dissipation
In high-speed mode ..........................................................34 mW
(at 8 MHz oscillation frequency, at 5 V power source voltage)
In low-speed mode
Except M38507F8FP/SP ................................................... 60 µW
M38507F8FP/SP ............................................................. 450 µW
(at 32 kHz oscillation frequency, at 3 V power source voltage)
a71Operating 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
P

41/INT0
P

42/INT1
P

43/INT2/SCMP2
A

VSS
P

44/INT3/PWM
VR

EF
VC

C
P

00/SIN2
P

04
P

05
P

06
P

07
P

11/(LED1)
P

12/(LED2)
P

13/(LED3)
P

14/(LED4)
P

15/(LED5)
P

10/(LED0)
P

01/SOUT2
P

02/SCLK2
P

31/AN1
P

32/AN2
P

30/AN0
P

33/AN3
P

34/AN4
P

03/SRDY2
4

0
41
4

2
2

2
23
2

4
25
2

6
27
2

8
29
3

0
3

1
3

2
34
35
3

6
3

7
38
39
33
3
2
1
2

1
20
1

9
18
1

7
16
1

5
14
1

3
1

2
1

1
9
8
7
6
5
4
10
M

3

8

5

0

3

M

X

H

-

X

X

X

F

P

/

S

P
P16/(LED6)
P

17/(LED7)
P

27/CNTR0/SRDY1
P

26/SCLK
P25/TxD
P

24/RxD
P

23
P

22
C

NVSS
P

21/XCIN
P

20/XCOUT
R

ESET
XI

N
XO

UT
VS

S
VP

P
:

Flash memory version
✽This data sheet describes Spec. H and Spec. A of 3850 Group. The header of each
page shows which specification is explained in the page. The page explaining about
both specifications shows the header of “Spec. H/A”.
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