lan91c100 Standard Microsystems Corp., lan91c100 Datasheet - Page 85

• Manufacturer Part Number: lan91c100
• Description: Feast ? Ast Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

t5A
t1
t2
t3
t4
t5
WRITE DATA
READ DATA
nRD, nWR
nDATACS
A1-A15, AEN, nBE0-nBE3 Valid and nADS Low Setup
to nRD, nWR Active
A1-A15, AEN, nBE0-nBE3 Hold After nRD, nWR
Inactive (Assuming nADS Tied Low)
nRD Low to Valid Data
nRD High to Data Floating
Data Setup to nWR Inactive
Data Hold After nWR Inactive
nADS
(nDATACS Used to Select Data Register; Must Be 32 Bit Access)
FIGURE 15 - ASYNCHRONOUS CYCLE - nADS = 0
PARAMETER
t1
74
t3
D0-D31 valid
t5
MIN
25
20
30
5
t4
TYP
t5A
t2
MAX
40
30
UNITS
ns
ns
ns
ns
ns
ns