MB91307 datasheet(8/96 Pages) FUJITSU

8 / 96 page

MB91307 Series

(Continued)

Pin no.

Pin name

I/O

circuit type

Description

DREQ1

DMA external transfer request input. When selected as a DMA startup

source, this input is in use at all times, so that output from other functions

must be stopped unless used intentionally.

PB3

General purpose input/output port.

DACK1

DMA external transfer request acknowledge output. This function is valid

when the DMA transfer request acknowledge output setting is enabled.

PB4

General purpose input/output port. This function is enabled when the

DNA transfer request acknowledge output setting is disabled.

DEOP1

DMA external transfer end output. This function is valid when the DMA

external transfer end output setting is enabled.

DSTP1

DMA external transfer stop input. This function is valid when the DMA ex-

ternal transfer stop input setting is enabled.

PB5

General purpose input/output port. This function is valid when the DMA

external transfer end output selection and the DMA external transfer stop

input selection are disabled.

Clock (oscillator) output

Clock (oscillator) input

IOWR

Write strobe output for DMA fly-by transfer. This function is valid when

the DMA fly-by transfer write strobe output setting is enabled.

PB6

General purpose input/output port. This function is valid when the DMA

fly-by transfer write strobe output setting is disabled.

IORD

Read strobe output for DMA fly-by transfer. This function is valid when

the DMA fly-by transfer read strobe output setting is enabled.

PB7

General purpose input/output port. This function is valid when the DMA

fly-by transfer read strobe output setting is disabled.

CS0

Chip select output. This function is valid when the chip select 0 output

setting is enabled.

PA1

General purpose input/output port. This function is valid when the chip

select 0 output setting is disabled.

CS1

Chip select output. This function is valid when the chip select 1 output

setting is enabled.

PA1

General purpose input/output port. This function is valid when the chip

select 1 output setting is disabled.

CS2

Chip select output. This function is valid when the chip select 2 output

setting is enabled.

PA2

General purpose input/output port. This function is valid when the chip

select 2 output setting is disabled.

CS3

Chip select output. This function is valid when the chip select 3 output

setting is enabled.

PA3

General purpose input/output port. This function is valid when the chip

select 3 output setting is disabled.

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