Z80189 Datasheet, PDF (19/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
16550 MIMIC TIMING
PRELIMINARY
HA2, HA1, HA0
Valid
/HCS
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
/HRD
/HWR
1
2
3
4
5
6
Figure 20. PC Host /RD /WR Timing
No Symbol
1 TsAR
2 tsCSR
3 tsAW
4 tsCSW
5 tAh
6 tCSh
Table 3. PC Host /RD /WR Timing Table
Parameter
Z80L189-20 MHz
Min
Max
Z80189-33 MHz
Min
Max
H Address to/HRD Fall Setup
30
30
/HCS to /HRD Fall Setup
30
30
H Address to /HWR Fall Setup
30
30
/HCS to /HRD Fall Setup
30
30
H Address from /HRD /HWR Hold 20
20
/HCS from /HRD /HWR Hold
20
20
Units
ns
ns
ns
ns
ns
ns
DS971890301
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