HD6417618 datasheet(465/646 Pages) RENESAS

465 / 646 page

Section 16 Pin Function Controller (PFC)

Rev. 6.00 Jun. 12, 2007 Page 433 of 610

REJ09B0131-0600

16.1.1

Port A IO Register H (PAIORH)

PAIORH is a 16-bit readable/writable register that selects the input/output directions of the port A

pins. Bits PA25IOR to PA16IOR correspond to pins PA25 to PA16 (the pin name abbreviations

for multiplexed functions are omitted). PAIORH is enabled when a port A pin functions as a

general input/output (PA25 to PA16), otherwise, disabled.

Setting a bit in PAIORH to 1 makes the corresponding pin function as an output and clearing a bit

in PAIORH to 0 makes the pin function as an input.

Bits 15 to 10 in PAIORH are reserved. These bits are always read as 0. The write value should

always be 0.

The initial value of PAIORH is H'0000.

16.1.2

Port A Control Register H1 and H2 (PACRH1 and PACRH2)

PACRH1 and PACRH2 are 16-bit readable/writable registers that select the pin functions for the

multiplexed port A pins.

• PACRH1

Bit

Bit Name

Initial

Value

R/W

Description

15 to 3



All 0

Reserved

These bits are always read as 0. The write value should

always be 0.

PA25MD0

R/W

PA25 Mode

Selects the function of pin PA25/A25.

0: PA25 input/output (port)

1: A25 output (BSC)



Reserved

This bit is always read as 0. The write value should

always be 0.

PA24MD0

R/W

PA24 Mode

Selects the function of pin PA24/A24.

0: PA24 input/output (port)

1: A24 output (BSC)

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