UM6522A Datasheet, PDF (5/17 Pages) UMC Corporation – Versatile Interface Adapter (VIA)

Timing Waveforms (Continued)
READ IRA
OPERATION
CA2
“DATA TAKEN”
CA1
“DATA READY”
Figure 5b. CA2 Timing for Read Handshake, Handshake Mode
UM6522/A
-
$2
WRITE ORA, ORB
OPERATION
CA2, CB2
“DATA READY”
PA, PB
PERIPHERAL DATA
ft
-TWHS - -TRS~ -
Figure 5c. CA2, CB2 Timing for Write Handshake, Pulse Mode
WRITE ORA, ORB
OPERATION
- TWHS-
CA2, CB2
“DATA READY”
PA, PB
PERIPHERAL DATA
CAl, CE1
“DATA TAKEN”
ATRs~
/ ji-
ACTIVE
TRANSITION ~
Figure 5d. CA2, CB2 Timing for Write Handshake, Handshake Mode
PA, PB
PERIPHERAL
INPUT DATA
CAl, CB1
INPUT LATCHING
CONTROL
TRANSITION
Figure 5e. Peripheral Data Input Latch Timing
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