X88C75 Datasheet, PDF (21/27 Pages) Xicor Inc. – Port Expander and E2 Memory

X88C75 SLIC^® E²
Port Write Diagram
A15–A8
CE
ALE
5
ADDRESS
A0-A15
2
6
1
WR
AD7–AD0
STRA/STRB* (OUT)
3
4
5
ADDRESS
A7-A0
6
8
7
DATA VALID
10
9
11
PA7:0 / PB7:0
PREVIOUS DATA
NOTE: *Figure shows active HIGH strobes.
VALID NEW DATA
2887 ILL F27.1
PORT WRITE TIMING
No. Symbol
Parameter
1
t_LHLL
ALE Pulse Width
2 t_WCS Write Chip Select Setup Time
3
t_LLWL ALE to WR
4
t_WLWH WR Pulse Width
5 t_AVLL Write Address Setup Time
6 t_LLAX Write Address Hold Time
7
t_DVWH Data Setup Time
8 t_WHDX Data Hold Time
9 t_SVSX Strobe Pulse Width
10 t_QVSV Strobe Access Time
11 t_POS
Port Output Setup Time
21
Min.
80
20
10
120
20
30
50
10
120
Max.
40
40
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2887 PGM T14.1