H8SLASH3021 datasheet(186/712 Pages) RENESAS

186 / 712 page

7. I/O Ports

Rev.2.00 Mar. 22, 2007 Page 162 of 684

REJ09B0352-0200

7.9

Port 9

7.9.1

Overview

Port 9 is a 6-bit input/output port that is also used for input and output (TxD

0, TxD1, RxD0, RxD1,

SCK

0, SCK1) by serial communication interface channels 0 and 1 (SCI0 and SCI1), and for IRQ5

and

IRQ

4 input.

Port 9 has the same set of pin functions in all operating modes. Figure 7.21 shows the pin

configuration of port 9.

Pins in port 9 can drive one TTL load and a 30-pF capacitive load. They can also drive a

Darlington transistor pair.

Port 9

P9 (input/output)/SCK

P9 (input/output)/RxD (input)

P9 (input/output)/TxD (output)

Port 9 pins

(input/output)/

IRQ (input)

(input/output)/

IRQ (input)

Figure 7.21 Port 9 Pin Configuration

7.9.2

Table 7.13 summarizes the registers of port 9.

Table 7.13

Port 9 Registers

Address*

Name

Abbreviation

R/W

Initial Value

H'FFD0

Port 9 data direction register

P9DDR

H'C0

H'FFD2

Port 9 data register

P9DR

R/W

H'C0

Note:

Lower 16 bits of the address.

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