91C94 Datasheet, PDF (109/120 Pages) SMSC Corporation – ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM

nTXEN
TX D
TXCLK
t22
t22
Parameter
t22
T XD, nT XEN Delay from TXCLK Fall ing
mi n
typ
max
units
0
40
ns
FIGURE 35 – EXTERNAL ENDEC INTERFACE – START OF TRANSMIT
RXD
RXCLK
t23
t24
nCRS
t23
Parameter
t23
nCRS, RXD Setup to RXCLK Falling
t24
nCRS, RXD Hold after RXCLK Falling
min
typ
max
units
10
ns
30
ns
FIGURE 36 – EXTERNAL ENDEC INTERFACE – RECEIVE DATA
(RXD SAMPLED BY FALLING RXCLK)
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