Renesas H8S Series Hardware Manual page 288

16-bit single-chip microcomputer

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Table of Contents

Section 8 I/O Ports

• PG4/ExIRQ12/ExSDAA

The pin function is switched as shown below according to the combination of the SDA1AS

and SDA0AS bits in PTCNT1, ICE bit in ICCR of IIC_1 and IIC_0, and the PG4DDR bit.

When the ISS12 bit in ISSR16 is set to 1 and the IRQ12E bit in IER16 of the interrupt

controller is set to 1, this pin can be used as the ExIRQ12 input pin.

Pin function

Note: SDA1AS and SDA0AS, SDA1AS and SDA1BS, and SDA0AS and SDA0BS should not be

set to 1 at the same time. The output format for ExSDAA is NMOS open-drain output, and

direct bus drive is possible.

• PG3/ExIRQ11/ExTMIY

The pin function is switched as shown below according to the PG3DDR bit. When the TMIYS

bit in PTCNT0 and the CCLR1 and CCLR0 bits in TCR of TMR_Y are cleared to 0, this pin is

used as the ExTMIY (ExTMRIY) input pin. When the ISS11 bit in ISSR16 is set to 1 and the

IRQ11E bit in IER16 of the interrupt controller is set to 1, this pin can be used as the ExIRQ11

Pin function

Rev. 3.00 Jul. 14, 2005 Page 240 of 986

REJ09B0098-0300

PG3 input pin

ExIRQ11 input pin/ExTMIY input pin

input/output

ExIRQ12 input pin

input/output

PG3 output pin

H8s/2100 series H8s/2114r R4f2114r