HD64F3644PV Datasheet, PDF (209/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 8 I/O Ports
Port Data Register 5 (PDR5)
Bit
Initial value
Read/Write
7
P57
0
R/W
6
P56
0
R/W
5
P55
0
R/W
4
P54
0
R/W
3
P53
0
R/W
2
P52
0
R/W
1
P51
0
R/W
0
P50
0
R/W
PDR5 is an 8-bit register that stores data for port 5 pins P5₇ to P5₀. If port 5 is read while PCR5
bits are set to 1, the values stored in PDR5 are read, regardless of the actual pin states. If port 5 is
read while PCR5 bits are cleared to 0, the pin states are read.
Upon reset, PDR5 is initialized to H'00.
Port Control Register 5 (PCR5)
Bit
Initial value
Read/Write
7
PCR57
0
W
6
PCR56
0
W
5
PCR55
0
W
4
PCR54
0
W
3
PCR53
0
W
2
PCR52
0
W
1
PCR51
0
W
0
PCR50
0
W
PCR5 is an 8-bit register for controlling whether each of the port 5 pins P5₇ to P5₀ functions as an
input pin or output pin. Setting a PCR5 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR5 is initialized to H'00.
PCR5 is a write-only register, which is always read as all 1s.
Port Pull-Up Control Register 5 (PUCR5)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PUCR57 PUCR56 PUCR55 PUCR54 PUCR53 PUCR52 PUCR51 PUCR50
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PUCR5 controls whether the MOS pull-up of each port 5 pin is on or off. When a PCR5 bit is
cleared to 0, setting the corresponding PUCR5 bit to 1 turns on the MOS pull-up for the
corresponding pin, while clearing the bit to 0 turns off the MOS pull-up.
Upon reset, PUCR5 is initialized to H'00.
Rev. 6.00 Sep 12, 2006 page 187 of 526
REJ09B0326-0600