Datasheet

Section 9 I/O Ports
Rev. 4.00 Mar. 15, 2006 Page 138 of 556
REJ09B0026-0400
9.7.2 Port Data Register 9 (PDR9)
PDR9 is a general I/O port data register of port 9.
Bit Bit Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
P97
P96
P95
P94
P93
P92
P91
P90
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Stores output data for port 9 pins.
If PDR9 is read while PCR9 bits are set to 1, the value
stored in PDR9 are read. If PDR9 is read while PCR9 bits
are cleared to 0, the pin states are read regardless of the
value stored in PDR9.
9.7.3 Pin Functions
The correspondence between the register specification and the port functions is shown below.
• P97/HTXD pin
Register TCMR PCR9
Bit Name PMR97 PCR97 Pin Function
Setting Value 0 0 P97 input pin
1 P97 output pin
1 X HTXD output pin
[Legend]
X: Don't care.