H8SSLASH2224 datasheet(406/1071 Pages) RENESAS

406 / 1071 page

Section 10 I/O Ports

Rev. 5.00 Aug 08, 2006 page 320 of 982

REJ09B0054-0500

• P33/TxD1/SCL1

The pin functions are switched as shown below according to the combination of the ICE bit*2

in ICCR_1 of IIC_1, the TE bit in SCR_1 of SCI_1, and the P33DDR bit. SCL1 functions as

NMOS open drain output and can drive bus directly.

ICE*2



P33DDR



Pin functions

P33 input pin

P33 output pin*

TxD1 output pin*

SCL1 I/O pin*

Notes: 1. When P33ODR is set to 1, it functions as NMOS open drain output.

2. Not available in the H8S/2237 Group and H8S/2227 Group.

• P32/SCK0/SDA1/IRQ4

The pin functions are switched as shown below according to the combination of the ICE bit*3

in ICCR_1 of IIC_1, the C/

A bit in SMR_0 of SCI_0, CKE1 and CKE0 bits in SCR, and the

P32DDR bit. To use this port as SDA1 input pin, clear the C/

A bit, CKE0 bit, and CKE1 bit to

0. The SDA1 functions as NMOS open drain output and can drive bus directly.

ICE*

CKE1



CKE0



P32DDR





P32 input

P32 output

pin*

SCK0 output

pin*

SCK0 output

pin*

SCK0 input

SDA1 I/O

pin*

Pin functions

IRQ4 Input*2

Notes: 1. When P32ODR is set to 1, it functions as NMOS open drain output.

2. When this pin is used as an external interrupt pin, do not specify other functions.

3. Not available in the H8S/2237 Group and H8S/2227 Group.

• P31/RxD0

The pin functions are switched as shown below according to the combination of the RE bit in

SCR_0 of SCI_0 and the P31DDR bit.

P31DDR



Pin functions

P31 input pin

P31 output pin*

RxD0 input

Note:

* When P31ODR is set to 1, it functions as NMOS open drain output.

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