m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 84

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

2. APPLICATION
2.1 I/O Port
Fig. 2.1.1 Structure of Port Pi (i = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B)
Fig. 2.1.2 Structure of Port P2 direction register
70
2.1.1 Related registers
Port Pi
Port P2 direction register
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
Note :
B
0
1
2
3
4
5
6
7
B
0
1
2
3
4
5
6
7
Port P2 direction register (P2D) [Address:05
Port Pi (Pi) (i = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B)
Because P2
direction register function and nothing is allocated.
Port Pi
Port Pi
Port Pi
Port Pi
Port Pi
Port Pi
Port Pi
Port Pi
Port P2 direction register
Port PB register [Address:16
Port PB is a four-bit port (PB
read out, the contents are “0.”
1
2
3
4
5
6
7
0
[Address:00
Name
Name
0
3819 Group USER’S MANUAL
to P2
3
are output ports, these bits do not have a
16
, 02
16
, 04
0
16
0 : Port P2
1 : Port P2
0 : Port P2
1 : Port P2
0 : Port P2
1 : Port P2
0 : Port P2
1 : Port P2
16
to PB
]
, 06
In output mode
In input mode
16
Write
Read
Write : Port latch
Read : Value of pins
3
, 08
). Accordingly, when bits 4 to 7 are
16
]
4
4
5
5
6
6
7
7
16
input mode
output mode
input mode
output mode
input mode
output mode
input mode
output mode
Function
Function
, 0A
Port latch
16
, 0C
(Note)
16
MITSUBISHI MICROCOMPUTER
, 0E
16
, 10
16
3819 Group
2.1 I/O port
At reset
, 12
At reset
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
16
, 14
R W
R W
16
, 16
16
]