HD64F36034 datasheet(164/592 Pages) RENESAS

164 / 592 page

Section 9 I/O Ports

Rev. 4.00 Mar. 15, 2006 Page 132 of 556

REJ09B0026-0400

9.5.1

Port Control Register 7 (PCR7)

PCR7 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 7.

Bit

Bit Name

Initial

Value

R/W

Description



PCR76

PCR75

PCR74



PCR72

PCR71

PCR70



When each of the port 7 pins P76 to P74 and P72 to P70

functions as a general I/O port, setting a PCR7 bit to 1

makes the corresponding pin an output port, while

clearing the bit to 0 makes the pin an input port.

Bits 7 and 3 are reserved bits.

9.5.2

Port Data Register 7 (PDR7)

PDR7 is a general I/O port data register of port 7.

Bit

Bit Name

Initial

Value

R/W

Description



P76

P75

P74



P72

P71

P70



R/W



R/W

Stores output data for port 7 pins.

If PDR7 is read while PCR7 bits are set to 1, the value

stored in PDR7 are read. If PDR7 is read while PCR7 bits

are cleared to 0, the pin states are read regardless of the

value stored in PDR7.

Bits 7 and 3 are reserved bits. These bits are always read

as 1.

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