80C196NT View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

80C196NT

CHMOS MICROCONTROLLER WITH 1 MBYTE LINEAR ADDRESS SPACE

Intel 

8XC196NT

8XC196NT ADDITIONAL BUS TIMING MODES

The 8XC196NT device has 3 additional bus timing

modes for external memory interfacing

MODE 3

Mode 3 is the standard timing mode Use this mode

for systems that emulate the 8XC196KR bus tim-

ings

MODE 1

Mode 1 is the long R W mode This mode advances

RD and WR signals by 1 TOSC creating a 2 TOSC

RD WR low time ALE is also advanced by 0 5 TOSC

but ALE high time remains 1 TOSC

MODE 2

MODE 0

Mode 0 is the standard timing mode but 1 (mini-

mum) wait state is always inserted in external bus

cycles

Mode 2 is the long R W mode with Early Address

Mode 2 is similar to Mode 1 with respect to RD WR

and ALE signals Additionally the address is output

on the bus 0 5 TOSC earlier in the bus cycle

Figure 4 Detailed MODE 1 2 3 Comparison

272267 – 4

9

Share Link: