Z80189 Просмотр технического описания (PDF) - Zilog
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Z80189 Datasheet PDF : 107 Pages
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Zilog
PRELIMINARY
16550 MIMIC TIMING (Continued)
/HA3 - /HA9
Valid
HAEN
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
/HRD
/HWR
1
2
3
4
5
6
Figure 21. Com Port Decode Mode
PC Host /RD /WR Timing
No Symbol
1 tsAR
2 tsCSR
3 tsAW
4 tsCSW
5 tAh
6 tCSh
Table 4. Com Port Decode Mode
PC Host /RD /WR Timing Table
Parameter
Z8L189-20 MHz
Min
Max
H Address to/HRD Fall Setup
30
/HCS to /HRD Fall Setup
30
H Address to /HWR Fall Setup
30
/HCS to /HRD Fall Setup
30
H Address from /HRD /HWR Hold 20
/HCS from /HRD /HWR Hold
20
Z80189-33 MHz
Min
Max
30
30
30
30
20
20
Units
ns
ns
ns
ns
ns
ns
20
DS971890301
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