Z8523016VEG Datasheet, PDF (96/118 Pages) Zilog, Inc. – Enhanced Serial Communications Controller

Z80230/Z85230/L
Product Specification
91
Table 47. Z85230/L AC Characteristics (20MHz applies only to Z85230) (Continued)
8.5 MHz
10 MHz
16 MHz
20 MHz
No Symbol
Parameter
Min Max Min Max Min Max Min Max Notes
18 TsCEh (WR) CE High to WR 58
58
38
25
6
Fall Setup Time
19 TsCEI (RD) CE Low to RD Fall 0
0
0
0
1, 6
Setup Time
20 ThCE ((RD) CE to RD Rise
0
0
0
0
1, 6
Hold Time
21 TsCEh (RD) CE High to RD Fall 58
50
30
25
1, 6
Setup Time
22 TwRDI
RD Low Width
145
125
70
65
1, 6
23 TdRD (DRA) RD Fall to Read 0
0
0
0
6
Data Active Delay
24 TdRDr (DR) RD Rise to Data 0
0
0
0
6
Not Valid Delay
25 TdRDI
RD Fall to Read
135
120
70
Data Valid Delay
65 6
26 TdRD (DRz) RD Rise to Read
38
35
30
30 6
Data Float Delay
27 TdA (DR) Addr to Read Data
210
180
100
90 6
Valid Delay
28 TwWRI
WR Low Width 145
125
75
65
6
29 TdWR (DW) WR Fall to Write
20
20
20
20 6
Data Valid Delay
30 ThDW (WR) Write Data to WR 0
0
0
0
6
Rise Hold Time
31 TdWR (W) WR Fall to Wait
Valid Delay
168
100
50
50 3, 6
32 TdRD (W)
RD Fall to Wait
Valid Delay
168
100
50
50 3, 6
33 TdWRf
WR Fall to W/REQ
168
100
50
(REQ)
not Valid Delay
60
50 6
8
34 TdRDf
(REQ)
RD Fall to WR/
REQ Not Valid
Delay
168
100
50
60
50 5,6
8
PS005308-0609
Electrical Characteristics