SMC Networks SMC91C95 Bedienungsanleitung PDF herunterladen (Seite 122)

122

FIGURE 30 - DATA REGISTER SPECIAL READ ACCESS

A0-15

(ISA)

AEN,

nSBHE

nIOCS16

D0-D15

nIORD

VALID DATA

VALID ADDRESS

IOCHRDY

OUT

t18

t19

Parameter

min

typ

max

units

575

225

t18

t19

Control Active to IOCHRDY Low

IOCHRDY Width when Data is Unavailable at

Data Register

Valid Data to IOCHRDY Inactive

IOCHRDY is used instead of meeting t20 and t43.

"No Wait St' bit is 1 - IOCHRDY only negated if needed and only for Data Register access.

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SMC Networks SMC91C95 Bedienungsanleitung Seite 122