XR16C872 Datasheet, PDF (49/60 Pages) Exar Corporation – DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER

DISCONTINUED
XR16C872
1284 Controller AC Electrical Characteristics (continue)
Symbol
Parameter
T51 IOW# inactive to Host command active
(IOW# or IOR#)
T52 IOCHRDY pre-charge width at release
T53 Host address setup to IOR# active
T54 Host address hold from IOR# active
T55 Host data setup to IOR# inactive
T56 Host data hold from IOR# inactive
T57 IOR# active to IOCHRDY low
T58 IOCHRDY high to Host terminate
(IOR# inactive)
T59 IOR# inactive to Host command active
(IOW# or IOR#)
Limits
3.3
Min Max
Limits
5.0
Min Max
40
Units
ns
10
ns
40
ns
10
ns
0
20
ns
0
ns
0
20
ns
10
ns
40
ns
Conditions
Rev. 1.00
Visit Exar Web Site at www.exar.com
49