Z80189 Просмотр технического описания (PDF) - Zilog

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производитель

Z80189

GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog 

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

19

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