SH7041A datasheet(690/923 Pages) RENESAS

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19.3

Port B

Port B is a 10-pin input/output port as listed in table 19.5.

Table 19.5

Port B

ROM Disabled Extended

Mode (Modes 0, 1)

ROM Enabled Extended

Mode (Mode 2)

Single Chip Mode

PB9 (I/O)/

IRQ7 (input)/A21

(output)/

ADTRG (input)

PB9 (I/O)/

IRQ7 (input)/A21

(output)/

ADTRG (input)

PB9 (I/O)/

IRQ7 (input)/ADTRG

(input)

PB8 (I/O)/

IRQ6 (input)/A20

(output)/

WAIT (input)

PB8 (I/O)/

IRQ6 (input)/A20

(output)/

WAIT (input)

PB8 (I/O)/

IRQ6 (input)

PB7 (I/O)/

IRQ5 (input)/A19

(output)/

BREQ (input)

PB7 (I/O)/

IRQ5 (input)/A19

(output)/

BREQ (input)

PB7 (I/O)/

IRQ5 (input)

PB6 (I/O)/

IRQ4 (input)/A18

(output)/

BACK (output)

PB6 (I/O)/

IRQ4 (input)/A18

(output)/

BACK (input)

PB6 (I/O)/

IRQ4 (input)

PB5 (I/O)/

IRQ3 (input)/POE3

(input)/RDWR (output)

PB5 (I/O)/

IRQ3 (input)/POE3

(input)/RDWR (output)

PB5 (I/O)/

IRQ3 (input)/POE3

(input)

PB4 (I/O)/

IRQ2 (input)/POE2

(input)/

CASH (output)

PB4 (I/O)/

IRQ2 (input)/POE2

(input)/

CASH (output)

PB4 (I/O)/

IRQ2 (input)/POE2

(input)

PB3 (I/O)/

IRQ1 (input)/POE1

(input)/

CASL (output)

PB3 (I/O)/

IRQ1 (input)/POE1

(input)/

CASL (output)

PB3 (I/O)/

IRQ1 (input)/POE1

(input)

PB2 (I/O)/

IRQ0 (input)/POE0

(input)/

RAS (output)

PB2 (I/O)/

IRQ0 (input)/POE0

(input)/

RAS (output)

PB2 (I/O)/

IRQ0 (input)/POE0

(input)

A17 (output)

PB1 (I/O)/A17 (output)

PB1 (I/O)

A16 (output)

PB0 (I/O)/A16 (output)

PB0 (I/O)

19.3.1

Table 19.6 summarizes the port B register.

Table 19.6

Port B Register

Name

Abbreviation

R/W

Initial Value

Address

Access Size

Port B data register

PBDR

R/W

H'0000

H'FFFF8390

H'FFFF8391

8, 16, 32

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