user manual

10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
Revision 1.91 (08-18-08) 112 SMSC LAN91C111 REV C
DATASHEET
Figure 14.3 Asynchronous Cycle - nADS=0
PARAMETER MIN TYP MAX UNITS
t1A nDATACS Setup to nRD, nWR Active 2 ns
t2 nDATACS Hold After nRD, nWR Inactive (Assuming nADS Tied
Low)
5ns
t3A nRD Low to Valid Data 30 ns
t4 nRD High to Data Invalid 2 15 ns
t5 Data Setup to nWR Inactive 10 ns
t5A Data Hold After nWR Inactive 5 ns
t6A nRD Strobe Width 30 ns
Figure 14.4 Asynchronous Ready
t5A
t5
t6A
t1A
t4t3A
t2
valid
D0~D31 valid
0ns 50ns 100ns 150ns 200ns 250
n
nDATACS
Read Data
nRD,nWR
Write Data
Asynchronous Cycle - nADS=0
t26A
t13
t26t26
Valid Data
Valid Address Valid Address
Valid
A
ddress, AEN, nBE[3:0]
nRD, nWR
ARDY
Data