HD6432142 datasheet(301/1177 Pages) RENESAS

301 / 1177 page

Section 8 I/O Ports

Rev. 4.00 Sep 27, 2006 page 257 of 1130

REJ09B0327-0400

Table 8.19

Port 8 Pin Functions

Selection Method and Pin Functions

P86/

IRQ5/SCK1/

SCL1

The pin function is switched as shown below according to the combination of

bits CKE1 and CKE0 in SCR of SCI1, bit C/

A in SMR of SCI1, bit ICE in ICCR

of IIC1, and bit P86DDR.

ICE

CKE1

—

CKE0

——

P86DDR

———

—

Pin function

P86

input pin

P86

output pin

SCK1

output pin

SCK1

output pin

SCK1

input pin

SCL1

I/O pin

IRQ5 input pin

When the IRQ5E bit in IER is set to 1, this pin is used as the

IRQ5 input pin.

When this pin is used as the SCL1 I/O pin, bits CKE1 and CKE0 in SCR of

SCI1 and bit C/

A in SMR of SCI1 must all be cleared to 0. SCL1 is an NMOS-

only output, and has direct bus drive capability.

P85/

IRQ4/RxD1

The pin function is switched as shown below according to the combination of

bit RE in SCR of SCI1 and bit P85DDR.

P85DDR

—

Pin function

P85 input pin

P85 output pin

RxD1 input pin

IRQ4 input pin

When the IRQ4E bit in IER is set to 1, this pin is used as the

IRQ4 input pin.

P84/

IRQ3/TxD1

The pin function is switched as shown below according to the combination of

bit TE in SCR of SCI1 and bit P84DDR.

P84DDR

—

Pin function

P84 input pin

P84 output pin

TxD1 output pin

IRQ3 input pin

When the IRQ3E bit in IER is set to 1, this pin is used as the

IRQ3 input pin.

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