Z80189 Datasheet, PDF (21/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PRELIMINARY
16550 MIMIC TIMING (Continued)
HD7-HD0
Valid
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
/HWR
7
8
9
Figure 22. Data Setup and Hold, Output Delay, Write Cycle
HD7-HD0
Valid
/HRD
11
10
12
Figure 23. Data Setup and Hold, Output Delay, Read Cycle
No Sym
7 tDs
8 tDh
9 tWc
10 tRvd
11 THz
12 tRc
Table 5. Data Setup and Hold, Output Delay, Read Cycle Table
Parameter
Z8L189-20 MHz
Min
Max
Z80189-33 MHz
Min
Max
Data In to /HWR Rise Setup
30
30
Data In from /HWR Rise Hold
30
30
Write Cycle Delay
2.5
2.5
/HRD Fall to Data Out Valid Delay
125
125
/HRD Rise to Data Out Float Delay
100
100
Read Cycle Delay
2.5
2.5
Units
ns
ns
phi cycles
ns
ns
phi cycles
DS971890301
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