MITSUBISHI MICROCOMPUTERS
38B5 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
4
PRELIMINARY
Notice: This s not a final specification.
Some parametric imits are subject to change.
Table 2 Pin Description (2)
Function except a port function
Serial I/O1 function pins
Pin
Name
Function
P5
0
/S
IN1
,
P5
1
/S
OUT1
,
P5
2
/S
CLK11
,
P5
3
/S
CLK12
P5
4
/R
X
D,
P5
5
/T
X
D,
P5
6
/S
CLK21
,
________
P5
7
/S
RDY2
/
S
CLK22
P6
0
/CNTR
1
I/O port P5
8-bit CMOS I/O port with the same function as port P0.
CMOS compatible input level.
CMOS 3-state output structure.
Serial I/O2 function pins
I/O port P6
1-bit I/O port with the same function as port P0.
CMOS compatible input level.
N-channel open-drain output structure.
5-bit CMOS I/O port with the same function as port P0.
CMOS compatible input level.
CMOS 3-state output structure.
Timer input pin
P6
1
/CNTR
0
/
CNTR
2
________
P6
2
/S
RDY1
/
AN
8
P6
3
/AN
9
P6
4
/INT
4
/
S
BUSY1
/AN
10
,
P6
5
/S
STB1
/
AN
11
P7
0
/AN
0
–
P7
7
/AN
7
Timer I/O pin
Serial I/O1 function pin
A-D conversion input pin
A-D conversion input pin
Serial I/O1 function pin
A-D conversion input pin
Interrupt input pin (P6
4
)
I/O port P7
8-bit CMOS I/O port with the same function as port P0.
CMOS compatible input level.
CMOS 3-state output structure.
4-bit I/O port with the same function as port P0.
Low-voltage input level.
High-breakdown-voltage P-channel open-drain output structure.
4-bit CMOS I/O port with the same function as port P0.
Low-voltage input level.
A-D conversion input pin
P8
0
/FLD
32
– I/O port P8
P8
3
/FLD
35
FLD automatic display pins
P8
4
/FLD
36
P8
5
/RTP
0
/
FLD
37,
P8
6
/RTP
1
/
FLD
38
P8
7
/PWM
0
/
FLD
39
P9
0
/X
CIN
,
P9
1
/X
COUT
FLD automatic display pins
FLD automatic display pins
14-bit PWM output
I/O pins for sub-clock generating
circuit
(connect a ceramic resona-
I/O port P9
2-bit CMOS I/O port with the same function as port P0.
CMOS compatible input level.
CMOS 3-state output structure.
tor or a quarts-crystal oscillator)