W89C926 Datasheet, PDF (34/48 Pages) Winbond – PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER

W89C926 PENTIC+
Flash Memory
Memory Support Bus Access (Flash Access)
MSAn
FCS
MSRD
MSWR
MSDn
(Read)
MSDn
(Write)
T1
T2
T9
T11
T10
T3
T4
T12
T6
T5
Valid
T7
T8
Valid
SYMBOL
T1
T2
T3
T4a
T4b
T5
T6
T7
T8
T9
T10
T11
T12a
T12b
T12c
DESCRIPTION
MSA0-16 valid to FCS asserted.
FCS asserted to MSRD , MSWR asserted.
MSA0-16 held valid after MSRD , MSWR deasserted.
FCS held valid after MSRD deasserted.
FCS held valid after MSWR deasserted.
MSRD asserted to read data valid.
Read data hold from MSRD deasserted.
Write data setup to MSWR deasserted.
Write data hold from MSWR deasserted.
Access cycle time
Write pulse width
FCS asserted to MSWR deasserted
Write recovery time before read
Read recovery time before write
Consecutive same commands interval
MIN.
0
20
5
0
5
-
0
55
15
150
55
75
6
0
20
MAX.
-
-
-
-
-
60
-
-
-
-
-
-
-
-
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
µS
µS
nS
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