HD64F2168 Datasheet, PDF (232/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

8.3.3 Port 3 Pull-Up MOS Control Register (P3PCR)
P3PCR controls the port 3 built-in input pull-up MOSs.
Bit Bit Name Initial Value R/W Description
7
P37PCR 0
R/W In normal extended mode:
6
P36PCR 0
5
P35PCR 0
4
P34PCR 0
3
P33PCR 0
2
P32PCR 0
R/W Operation is not affected.
R/W ^{In other mode:}
R/W ^{When the pins are in input state, the corresponding}
input pull-up MOS is turned on when a P3PCR bit is set
R/W _{to 1.}
R/W
1
P31PCR 0
R/W
0
P30PCR 0
R/W
8.3.4 Pin Functions
Normal Extended Mode:
Port 3 pins automatically function as the bidirectional data bus.
Address/Data Multiplex Mode:
Same operation as the single-chip mode.
Single-Chip Mode:
• P37/WUE15
The pin function is switched as shown below according to the P37DDR bit.
When the WUEM15 bit in WUEMR3 of the interrupt controller is cleared to 0, this pin can be
used as the WUE15 input pin. To use this pin as the WUE15 input pin, clear the P37DDR bit
to 0.
P37DDR
WUEM15
Pin Function
0
0
WUEI15 input pin
1
P37 input pin
1

P37 output pin
Rev. 3.00, 03/04, page 192 of 830