MB86604LPFV datasheet(7/56 Pages) FUJITSU

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MB86604L

(Continued)

* : The pin symbols in parenthesis are the ones when the MODE input is “L”.

Others

* : The pin symbols in parenthesis are the symbols when the MODE input is “L”.

number

Symbol*

Pin name

I/O

Function

DMBHE

(DMUDS)

DMA bus

high enable

(DMA upper

data strobe)

In the 80-series mode, this pin is for the DMA bus high enable

signal input pin (DMBHE) output from the DMA controller when

the upper byte of the DMA data bus is valid. This is an active-low

pin. In the 68-series mode, this pin functions as the DMA upper

data strobe signal input pin (DMUDS) output from the DMA

controller when the upper byte of data bus is valid. The DMUDS

pin is also an active-low.

DMA0

DMA

address 0

In the 80-series mode, this pin is used for the DMA address 0

input pin output from the DMA controller. In the 68-series mode,

a high level should be input to this pin.

Transfer

permission

This is a DMA transfer permission signal input pin. When this pin

is in active-state, the SPC does the DMA transfer. In case that

this pin becomes inactive during the DMA transfer, the DMA

transfer is paused on the block boundary. This pin is an active

high.

number

Symbol*

Pin name

I/O

Function

RESET

Reset

System reset input pin. The input reset active pulse width must

have 4 times of the clock cycle at least. This is an active-low pin.

CLK

Clock

Clock signal input pin. 20 MHz, 30 MHz, or 40 MHz can be

applied as the input clock frequency.

3, 14, 28

53, 64, 78

VDD

Power supply

—

+5 V power supply pins.

4, 10, 15

16, 21, 29

40, 54, 59

65, 66, 70

79, 90

VSS

Ground

—

Ground pins.

TEST1

TEST

This pin is used to select the type of I/O buffer on SCSI data bus

pins. In case that DBP, DB7 – DB0 pins are used as an open-

drain I/O, connect this pin to VSS. In case of three-state I/O,

connect to VDD.

TEST2

TEST

This pin is used to select the type of I/O buffer on SCSI pins. In

case that MSG, C/D, I/O, and ATN pins are used as an open-

drain I/O, connect this pin to VSS. In case of three-state I/O,

connect to VDD.

TMOUT

TIMEOUT

This is a SCSI Timeout pin that indicates the SPC has been

busy longer than the specified time. A high level is output on this

pin if the SPC busy time exceeds the specified time.

This pin can be used for the timeout counter.

25, 26

(OPEN)

(Open)

—

These are open pins. Those pins are not connected with the

device internally. Those pins must be left open.

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