HD6433636SW datasheet(138/418 Pages) RENESAS

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124

Port Data Register 1 (PDR1)

Bit

76543210

Initial value

00000000

Read/Write

R/W

PDR1 is an 8-bit register that stores data for pins P1

7 to P10 of port 1. If port 1 is read while PCR1

bits are set to 1, the values stored in PDR1 are directly read, regardless of the actual pin states. If

port 1 is read while PCR1 bits are cleared to 0, the pin states are read.

Upon reset, PDR1 is initialized to H'00.

Port Control Register 1 (PCR1)

Bit

76543210

PCR1

Initial value

00000000

Read/Write

WWWWWWWW

PCR1 is an 8-bit register for controlling whether each of the port 1 pins P1

7 to P10 functions as an

input pin or output pin. Setting a PCR1 bit to 1 makes the corresponding pin an output pin, while

clearing the bit to 0 makes the pin an input pin. The settings in PCR1 and in PDR1 are valid only

when the corresponding pin is designated in PMR1 as a general I/O pin.

Upon reset, PCR1 is initialized to H'00.

PCR1 is a write-only register. All bits are read as 1.

Port Pull-Up Control Register 1 (PUCR1)

Bit

76543210

PUCR1

Initial value

00000000

Read/Write

R/W

PUCR1 controls whether the MOS pull-up of each port 1 pins P1

7 to P10 is on or off. When a

PCR1 bit is cleared to 0, setting the corresponding PUCR1 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, PUCR1 is initialized to H'00.

HD6433636SW Folha de dados(PDF) 138 Page - Renesas Technology Corp