m38039mf-xxxsp Mitsumi Electronics, Corp., m38039mf-xxxsp Datasheet - Page 19

• Manufacturer Part Number: m38039mf-xxxsp
• Description: Single-chip 8-bit Cmos Microcomputer
• Manufacturer: Mitsumi Electronics, Corp.

I/O PORTS
The I/O ports have direction registers which determine the input/
output direction of each individual pin. Each bit in a direction reg-
ister corresponds to one pin, and each pin can be set to be input
port or output port.
When “0” is written to the bit corresponding to a pin, that pin be-
Table 6 I/O port function of 3803 group
Notes 1: Refer to the applicable sections how to use double-function ports as function I/O ports.
P0
P1
P1
P1
P2
P2
P3
P3
P3
P3
P3
P3
P3
P3
P4
P4
P4
P4
P4
P4
P4
P4
P5
P5
P5
P5
P5
P5
P5
P5
P6
0
0
0
1
2
0
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
/AN
/INT
/INT
–P1
/LED
/LED
/DA
/DA
/RxD
/TxD
/S
/S
/INT
/INT
/INT
/INT
/RxD
/TxD
/S
/S
/S
/S
/S
/S
/CNTR
/CNTR
/PWM
/INT
/AN
2: Make sure that the input level at each pin is either 0 V or V
CLK3
RDY3
CLK1
RDY1
IN2
OUT2
CLK2
RDY2
Pin
8
0
1
2
01
7
When an input level is at an intermediate potential, a current will flow from V
41
00
40
1
2
3
–P0
–P6
3
1
0
7
3
1
–
/X
/X
0
1
/CNTR
7
7
CIN
COUT
/AN
/AN
15
7
2
Port P1
Port P3
Port P5
Port P0
Port P2
Port P4
Port P6
Name
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
N-channel open-drain output
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
CMOS 3-state output
I/O Structure
CC
during execution of the STP instruction.
comes an input pin. When “1” is written to that bit, that pin be-
comes an output pin.
If data is read from a pin which is set to output, the value of the
port output latch is read, not the value of the pin itself. Pins set to
input are floating. If a pin set to input is written to, only the port
output latch is written to and the pin remains floating.
External interrupt input
Sub-clock generating
circuit
External interrupt input
Serial I/O1 function I/O
Serial I/O1 function I/O
Timer Z function I/O
Timer X, Y function I/O
PWM output
External interrupt input
A-D converter input
A-D converter input
External interrupt input
D-A converter output
Serial I/O3 function I/O
Serial I/O2 function I/O
Non-Port Function
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
CC
to V
SS
MITSUBISHI MICROCOMPUTERS
through the input-stage gate.
Serial I/O1 control
register
Timer Z mode register
Serial I/O2 control
register
AD/DA control register
Interrupt edge selection
register
AD/DA control register
Serial I/O3 control
register
UART3 control register
Interrupt edge selection
register
CPU mode register
Interrupt edge selection
register
Serial I/O1 control
register
UART1 control register
Timer XY mode register
PWM control register
Interrupt edge selection
register
AD/DA control register
3803/3804 Group
Related SFRs
Ref.No.
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(10)
(11)
(6)
(7)
(8)
(2)
(1)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(2)
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