Z80181 Datasheet, PDF (72/74 Pages) Zilog, Inc. – SMART ACCESS CONTROLLER (SAC™)

Zilog
AC CHARACTERISTICS (Continued)
T1
CLK
/M1
T2
T _WA
T _WA
TW
TW
Settle Time for
Off-chip Z80
Peripherals
Settle Time for
On-chip CTC
Z80181
SMART ACCESS CONTROLLER SAC^™
TW
T3
/IORQ
SCC
/INTACK
/WAIT
SCC
/RD
CTC
/IORQ
Settle Time
for SCC
/WAIT Signal generated
by interface circuit
Figure 78. Interrupt Acknowledge Cycle Timing
Vcc
IEI
CTC ^{IEO IEI}
SCC ^IEO
IEI ^Peripheral IEO
Device(s)
Z80181
/IORQ
External
Logic to
Extend
/IORQ
Signal
Figure 79. Peripheral Device as Part of the Daisy Chain
2-72
DS971800500