HP 16500B User Reference page 96

Intermodule Measurements
What Are Some Typical Intermodule Measurements?
Interrupt Handling Example
Set up t he osci l l oscope t o t r i gger on t he asynchr onous i nt er r upt l i ne. Thi s i s
usual l y an edge- sensi t i ve l i ne on w hi ch t he osci l l oscope can t r i gger .
The st at e anal yzer shoul d be ar m ed by t he osci l l oscope. Set t he st at e
anal yzer t o t r i gger on al l " don' t car es" and i t w i l l capt ur e t he i nt er r upt ser vi ce
r out i ne w hen t he ar m si gnal i s r ecei ved. For t hi s i nt er m odul e m easur em ent ,
ar m i ng t he st at e anal yzer w i t h t he osci l l oscope al l ow s a sof t w ar e desi gner t o
t r ack t he f l ow of a m i cr opr ocessor pr ogr am ar ound a har dw ar e i nt er r upt .
Example
A Si m pl e Sti m ul us/ Response System
Dur i ng syst em devel opm ent , desi gner s ar e of t en f aced w i t h ver i f yi ng a par t of
a desi gn w hen t he i nput si gnal s f or t hat par t ar e unavai l abl e. Her e ar e som e
com m on exam pl es of t hi s pr obl em :
•
Ver i f yi ng har dw ar e oper at i on w hen a par t of t he har dw ar e i s unavai l abl e t o
dr i ve t he ci r cui t .
•
Test i ng a PC boar d w i t hout a boar d t est syst em .
The t r adi t i onal sol ut i on i s t o use w or d gener at or s t o em ul at e t he m i ssi ng par t
of t he desi gn, and t o use l ogi c anal yzer s and osci l l oscopes t o capt ur e t he
syst em r esponse.
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