S83C198 View Datasheet(PDF) - Intel

Part Name

Description

View to exact match

S83C198

COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER

Intel 

8XC198

FUNCTIONAL DEVIATIONS

Devices marked with an ‘‘E’’ ‘‘F’’ or ‘‘G’’ have the

following errata

1 HIGH SPEED INPUTS

The High Speed Input (HSI) has three deviations

from the specifications

NOTE

‘‘Events’’ are defined as one or more pin tran-

sitions ‘‘Entries’’ are defined as the recording of

one or more events

A The resolution is nine states instead of eight

states Events occurring on the same pin more

frequently than once every nine states may be

lost

B A mismatch between the nine state HSI resolu-

tion and the eight state hardware timer causes

one time-tag value to be skipped every nine timer

counts Events may receive a time-tag one count

later than expected

C If the FIFO and Holding Register are empty the

first event will transfer into the Holding Register

leaving the FIFO empty again The next event

that occurs will be the first event loaded into the

empty FIFO If the first two events into an empty

FIFO (not counting the Holding Register) occur

coincident with each other both are recorded as

one entry with one time-tag If the second event

occurs within 9 states after the first the events

will be entered separately with time-tags at least

one count apart If the second event enters the

FIFO coincident with the ‘‘skipped’’ time-tag situ-

ation (see B above) the time-tags will be at least

two counts apart

2 CMPL with R0

Using CMPL with register 0 can set incorrect flags

Don’t use register 0 with the compare long instruc-

tion Use another long word register and set it equal

to zero See Techbit MC0692

REVISION HISTORY

This data sheet (272034-003) is valid for devices

marked with an ‘‘E’’ ‘‘F’’ or ‘‘G’’ at the end of the

top side tracking number Data sheets are changed

as new device information becomes available Verify

with your local Intel sales office that you have the

latest version before finalizing a design or ordering

devices

The following differences exist between this data

sheet and the previous version (-002)

1 This data sheet added the ROMless and ROM

devices 80C198 and 83C198 respectively

2 The description of the A D converter prescalar

bit was improved

19

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