2 register descriptions – Panasonic MN103001G/F01K User Manual
Page 386
I/O Ports
15-20
15.5.2 Register Descriptions
Port 3 is a general-purpose input/output port that is also used for the bus grant signal BG.
Each register for port 3 is described below.
Port 3 output register
Register symbol: P3OUT
Address:
x'36008005
Purpose:
This register sets the data to be output on port 3.
Bit No.
7
6
5
4
3
2
1
0
Bit name
-
-
-
-
-
-
-
P30O
Reset
0
0
0
0
0
0
0
0
Access
R
R
R
R
R
R
R
R/W
Port 3 pin register
Register symbol: P3IN
Address:
x'36008085
Purpose:
This register reads the value of the port 3 pin.
Bit No.
7
6
5
4
3
2
1
0
Bit name
-
-
-
-
-
-
-
P30I
Reset
0
0
0
0
0
0
0
X
Access
R
R
R
R
R
R
R
R
Port 3 input/output control register
Register symbol: P3DIR
Address:
x'36008065
Purpose:
This register sets the port 3 pin for input or output.
(0: input; 1: output)
Bit No.
7
6
5
4
3
2
1
0
Bit name
-
-
-
-
-
-
-
P30D
Reset
0
0
0
0
0
0
0
0
Access
R
R
R
R
R
R
R
R/W