Figure 322. 16-bit bus read/write device interfac – Intel 80C188XL User Manual

Page 105

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BUS INTERFACE UNIT

3-24

Most memory and peripheral devices latch data on the rising edge of the write strobe. Address,
chip-select and data must be valid (set up) prior to the rising edge of WR. T

AW

, T

CW

and T

DW

de-

fine the minimum data setup requirements. The value calculated by their respective equations
must be greater than the device requirements. To increase the calculated value, insert wait states.

Figure 3-22. 16-Bit Bus Read/Write Device Interface

I/O1:8

A0:14

LA0

AD7:0

RD

OE

WE

CS1

WR

BHE

LCS

LA15:1

A0:14

OE

WE

CS1

I/O1:8

AD15:8

A1106-0A

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