INTERFACING WITH EXTERNAL MEMORY

VCC

BUSWIDTH

AD15:8

ADV#

8XC196

AD7:0

WRH#

WRL#

 

 

 

 

 

 

 

 

 

 

 

CS#

 

74AC

A13:8

 

 

A12:7

 

373

 

 

 

 

 

 

 

 

 

LE

 

 

 

D15:8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8K×8

 

 

 

 

 

 

LE

 

 

 

RAM

 

 

 

 

 

(High)

 

74AC

A7:1

 

 

 

A6:0

 

373

 

 

 

 

 

 

 

 

 

 

 

 

 

WE#

CS#

A12:7

D7:0

8K×8

RAM

(Low)

A6:0

WE#

A3097-01

Figure 15-21. 16-bit System with RAM

15.6 SYSTEM BUS AC TIMING SPECIFICATIONS

Refer to the latest datasheet for the AC timings to make sure your system meets specifications. The major external bus timing specifications are shown in Figure 15-22.

15-31

Page 346
Image 346
Intel 8XC196MH, 8XC196MD, 8XC196MC manual System BUS AC Timing Specifications, VCC Buswidth, Wrh# Wrl# Cs#, We# Cs#