Datasheet

Section 8 I/O Ports
Rev. 3.00 Sep. 28, 2009 Page 129 of 710
REJ09B0384-0300
8.1.3 Port 1 Pull-Up MOS Control Register (P1PCR)
P1PCR controls the port 1 built-in input pull-up MOSs.
Bit Bit Name Initial Value R/W Description
7 P17PCR 0 R/W
6 P16PCR 0 R/W
5 P15PCR 0 R/W
4 P14PCR 0 R/W
3 P13PCR 0 R/W
2 P12PCR 0 R/W
1 P11PCR 0 R/W
When the pins are in input state, the corresponding
input pull-up MOS is turned on when a P1PCR bit is
set to 1.
0 P10PCR 0 R/W
8.1.4 Port 1 Input Pull-Up MOS
Port 1 has a built-in input pull-up MOS that can be controlled by software. This input pull-up
MOS can be used regardless of the operating mode. Table 8.2 summarizes the input pull-up MOS
states.
Table 8.2 Port 1 Input Pull-Up MOS States
Reset
Hardware Standby
Mode
Software Standby
Mode
In Other Operations
Off Off On/Off On/Off
[Legend]
Off: Always off.
On/Off: On when P1DDR = 0 and P1PCR = 1; otherwise off.