H8SSLASH2214 datasheet(362/936 Pages) RENESAS

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Section 9 I/O Ports

Rev.4.00 Sep. 18, 2008 Page 302 of 872

REJ09B0189-0400

9.3.3

Pin Functions

Port 3 pins also function as SCI I/O pins (TxD0, RxD0, SCK0, TxD1, RxD1, and SCK1), interrupt

input pins (

IRQ4 and IRQ5), and an external expansion interrupt input pin (EXIRQ7). Port 3 pin

functions are shown in table 9.5.

Table 9.5

Port 3 Pin Functions

Pin Functions and Selection Method

P36

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

P36DDR bit and bit P36IRQ7E in IPINSELQ.

P36IRQ7E

P36DDR

—

Pin function

P36 input

P36 output*

EXIRQ7 input

Note: * NMOS open-drain output when P36ODR = 1.

P35/SCK1/

RQ5

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

A in

SMR of SCI1, bits CKE0 and CKE1 in SCR, and bit P35DDR.

CKE1

—

CKE0

—

P35DDR

—

Pin function

P35 input

P35 output*

SCK1 output*

1 SCK1 output*1 SCK1 input

IRQ5 input*2

Notes: 1. NMOS open-drain output when P35ODR = 1.

2. When used as an external interrupt pin, do not use for another function.

P34/RxD1

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

SCR of SCI1 and bit P34DDR.

P34DDR

—

Pin function

P34 input

P34 output*

RxD1 input

Note: * NMOS open-drain output when P34ODR = 1.

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