SMC Networks SMC91C95 - Manual (Page 122)

122
FIGURE 30 - DATA REGISTER SPECIAL READ ACCESS
A0-15
(ISA)
AEN,
nSBHE
nIOCS16
D0-D15
nIORD
VALID DATA
VALID ADDRESS
IOCHRDY
OUT
t9
t18
t19
Z
Z
Parameter min typ max units
15
575
225
ns
ns
ns
t9
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.