HD6413007F20 Datasheet, PDF(291/798 Page) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

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HD6413007F20 Datasheet, PDF (291/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

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8. I/O Ports

8.6 Port 9

8.6.1 Overview

Port 9 is a 6-bit input/output port that is also used for input and output (TxD0, TxD1, RxD0, RxD1,

SCK0,

SCK1)

by

serial

communication

interface

channels

0

and

1

(SCI0

and

SCI1),

and

for

IRQ

5

and IRQ4 input. See table 8.10 for the selection of pin functions.

The

IRQ

5

and

IRQ

4

functions

are

selected

by

IER

settings,

regardless

of

whether

the

pin

is

used

for

input or output. Caution is therefore required. For details see section 5.3.1, External Interrupts.

Port 9 has the same set of pin functions in all operating modes. Figure 8.5 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

Port 9 pins

P95 (input/output)/SCK1 (input/output)/IRQ5 (input)

P94 (input/output)/SCK0 (input/output)/IRQ4 (input)

P93 (input/output)/RxD1 (input)

P92 (input/output)/RxD0 (input)

P91 (input/output)/TxD1 (output)

P90 (input/output)/TxD0 (output)

Figure 8.5 Port 9 Pin Configuration

Rev.5.00 Sep. 12, 2007 Page 261 of 764

REJ09B0396-0500

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