AUTOMOTIVE 8XC196KB

AC TESTING INPUT OUTPUT WAVEFORMS

270679 – 7

AC Testing inputs are driven at 24V for logic ‘‘1’’ and 045V for a

logic ‘‘0’’ Timing measurements are made at 20V for a logic ‘‘1’’

and 08V for logic ‘‘0’’

FLOAT WAVEFORMS

270679 – 8

For timing purposes a port pin is no longer floating when a 100

mV change from load voltage occurs and begins to float when a

s

g

15 mA

EXPLANATION OF AC SYMBOLS

Each symbol is two pairs of letters prefixed by ‘‘t’’ for

time The characters in a pair indicate a signal and

its condition respectively Symbols represent the

time between the two signalcondition points

Conditions

Signals

H

High

A

Address

L

ALEADV

L

Low

B

BHE

R

RD

V

Valid

C

CLKOUT W

WR WRH WRI

X

No Longer Valid D

Data

X

XTAL1

Z

Floating

GBuswidth

Y

Ready

AC CHARACTERISTICSSERIAL PORTSHIFT REGISTER MODE

SERIAL PORT TIMINGSHIFT REGISTER MODE

Symbol

Parameter

Min

Max

Unit

ns

Serial Port Clock Falling Edge

Output Data Setup to Clock Rising Edge

ns

Output Data Hold after Clock Rising Edge

ns

Next Output Data Valid

ns

after Clock Rising Edge

Input Data Setup to Clock Rising Edge

ns

0

ns

ns

NOTES

8 Parameter not tested

13