Micrel, Inc.
KSZ8851-16MLLJ
March 2010
83
M9999-030210-1.0
Timing Specifications
Asynchronous Read and Write Timing
Figure 11. Asynchronous Cycle
Symbol
Parameter
Min
Typ
Max
Unit
t1
CSN, CMD valid to RDN, WRN active
0
ns
t2
Read Data SD[15:0] valid to RDN inactive
2
ns
t3
RDN inactive to Read data invalid
1
2
ns
t4
CSN, CMD hold after RDN, WRN inactive
0
ns
WRN active to write data valid (bit12=0 in RXFDPR)
8
16
ns
t5
WRN active to write data valid (bit12=1 in RXFDPR)
4
ns
RDN Read active time (low)
40
ns
t6
WRN Write active time (low)
40
ns
RDN Read inactive time (high)
10
ns
t7
WRN Write inactive time (high)
10
ns
Table 15. Asynchronous Cycle Timing Parameters
t5
t1
t3
t4
valid
CSN, CMD
Read Data
SD[15:0]
RDN, WRN
Write Data
SD[15:0]
t7
t6
t2
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