HD6473887 Datasheet, PDF (177/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

1. Port data register 6 (PDR6)
Bit
Initial value
Read/Write
7
P6 ₇
0
R/W
6
P6₆
0
R/W
5
P6₅
0
R/W
4
P6₄
0
R/W
3
P6 ₃
0
R/W
2
P6₂
0
R/W
1
P6₁
0
R/W
0
P6 ₀
0
R/W
PDR6 is an 8-bit register that stores data for port 6 pins P6₇ to P6₀.
If port 6 is read while PCR6 bits are set to 1, the values stored in PDR6 are read, regardless of the
actual pin states. If port 6 is read while PCR6 bits are cleared to 0, the pin states are read.
Upon reset, PDR6 is initialized to H'00.
2. Port control register 6 (PCR6)
Bit
Initial value
Read/Write
7
PCR6₇
0
W
6
PCR6₆
0
W
5
PCR6₅
0
W
4
PCR6₄
0
W
3
PCR6₃
0
W
2
PCR6₂
0
W
1
PCR6₁
0
W
0
PCR6₀
0
W
PCR6 is an 8-bit register for controlling whether each of the port 6 pins P6₇ to P6₀ functions as an
input pin or output pin.
Setting a PCR6 bit to 1 makes the corresponding pin (P6₇ to P6₀) an output pin, while clearing the
bit to 0 makes the pin an input pin. PCR6 and PDR6 settings are valid when the corresponding
pins are designated for general-purpose input/output by bits SGS3 to SGS0 in LPCR.
Upon reset, PCR6 is initialized to H'00.
PCR6 is a write-only register, which always reads all 1s.
3. Port pull-up control register 6 (PUCR6)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PUCR6₇ PUCR6₆ PUCR6₅ PUCR6₄ PUCR6₃ PUCR6₂ PUCR6₁ PUCR6₀
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PUCR6 controls whether the MOS pull-up of each of the port 6 pins P6₇ to P6₀ is on or off. When
a PCR6 bit is cleared to 0, setting the corresponding PUCR6 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, PUCR6 is initialized to H'00.
160