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1. Port Data Register 9 (PDR9)
Bit
7
P9
Initial value
0
Read/Write
R/W
PDR9 is an 8-bit register that stores data for port 9 pins P9
bits are set to 1, the values stored in PDR9 are read, regardless of the actual pin states. If port 9 is
read while PCR9 bits are cleared to 0, the pin states are read.
Upon reset, PDR9 is initialized to H'00.
2. Port Control Register 9 (PCR9)
Bit
7
PCR9
Initial value
0
Read/Write
W
PCR9 is an 8-bit register for controlling whether each of the port 9 pins P9
input pin or output pin. Setting a PCR9 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR9 and PDR9 are valid only
when the corresponding pin is designated by bits SGS3 to SGS0 in LPCR as a general I/O pin.
Upon reset, PCR9 is initialized to H'00.
PCR9 is a write-only register, which is always read as all 1s.
6
5
P9
P9
7
6
5
0
0
R/W
R/W
6
5
PCR9
PCR9
7
6
0
0
W
W
4
3
P9
P9
4
3
0
0
R/W
R/W
to P9
7
0
4
3
PCR9
PCR9
5
4
3
0
0
W
W
Rev. 6.00 Aug 04, 2006 page 245 of 680
Section 8 I/O Ports
2
1
P9
P9
2
1
0
0
R/W
R/W
. If port 9 is read while PCR9
2
1
PCR9
PCR9
2
1
0
0
W
W
to P9
functions as an
7
0
REJ09B0145-0600
0
P9
0
0
R/W
0
PCR9
0
0
W
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