Section 8 I/O Ports
Rev. 3.00 Mar. 14, 2006 Page 214 of 804
REJ09B0104-0300
Note: The lower four bits are valid and the upper four bits are reserved for port 2 input buffer control register (P2ICR).
The lower seven bits are valid and the upper one bit is reserved for port 6 input buffer control register (P6ICR).
The upper seven bits are valid and the lower one bit is reserved for port A input buffer control register (PAICR).
7
Pn7ICR
0
R/W
6
Pn6ICR
0
R/W
5
Pn5ICR
0
R/W
4
Pn4ICR
0
R/W
3
Pn3ICR
0
R/W
0
Pn0ICR
0
R/W
2
Pn2ICR
0
R/W
1
Pn1ICR
0
R/W
Bit
Bit Name
Initial Value
R/W
8.1.5
Pull-Up MOS Control Register (PnPCR) (n = D, H, J, and K)
PCR is an 8-bit readable/writable register that controls on/off of the port input pull-up MOS.
If a bit in PCR is set to 1 while the pin is in input state, the input pull-up MOS corresponding to
the bit in PCR is turned on. Table 8.3 shows the input pull-up MOS status.
The initial value of PCR is H'00.
7
Pn7PCR
0
R/W
6
Pn6PCR
0
R/W
5
Pn5PCR
0
R/W
4
Pn4PCR
0
R/W
3
Pn3PCR
0
R/W
0
Pn0PCR
0
R/W
2
Pn2PCR
0
R/W
1
Pn1PCR
0
R/W
Bit
Bit Name
Initial Value
R/W
Table 8.3
Input Pull-Up MOS State
Port Pin
State
Reset
Software
Standby Mode
Other
Operation
Port D
On-chip peripheral module
output
OFF OFF OFF
Port
input
OFF
ON/OFF
ON/OFF
Port H
Port output
OFF
OFF
OFF
Port
input
OFF
ON/OFF
ON/OFF
Port J
On-chip peripheral module
output
OFF OFF OFF
Port
input
OFF
ON/OFF
ON/OFF
Port K
On-chip peripheral module
output
OFF OFF OFF
Port
input
OFF
ON/OFF
ON/OFF
[Legend]
OFF:
The input pull-up MOS is always off.
ON/OFF: If PCR is set to 1, the input pull-up MOS is on; if PCR is cleared to 0, the input pull-up
MOS is off.
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