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KS8737-EVAL

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
KS8737 Micrel
KS8737 22 August 2003
RXP/RXM
RXD[3:0]
RXER
CRS
t
CR
S1
RXDV
t
RLAT
t
SU
t
HD
RXC
t
WL
t
WH
t
P
Figure 2. 10BaseT MII Receive Timing
Symbol Parameter Min Typ Max Units
t
P
RXC Period 400 ns
t
WL
RXC Pulse Width 200 ns
t
WH
RXC Pulse Width 200 ns
t
SU
RXD [3:0], RXER, RXDV Set-Up to Rising Edge of RXC 200 ns
t
HD
RXD [3:0], RXER, RXDV Hold from Rising Edge of RXC 200 ns
t
RLAT
RXDV Data Vaild from CSR 6.5 µs
t
CRS1
RXP/RXM Preamble to CRS Asserted 5 BT
Table 3. 10BaseT MII Receive Timing Parameters
Note 1. CRS is asserted but RXD/RXDV are driven from SFD as the first byte of packet.
August 2003 23 KS8737
KS8737 Micrel
TXC
t
S
U2
TXEN
t
HD2
TXD[3:0],
TXER
t
SU1
CRS
t
CRS2
t
CRS1
TXP/TXM
t
LAT
Symbol
Out
Data
In
t
HD1
Figure 3. 100BaseT MII Transmit Timing
Symbol Parameter Min Typ Max Units
t
SU1
TXD [3:0] TXER Set-Up to TXC High 10 ns
t
SU2
TXEN Set-Up to TXC High 10 ns
t
HD1
TXD [3:0] TXER Hold After TXC High 0 ns
t
HD2
TXEN Hold After TXC High 0 ns
t
CRS1
TXEN High to CRS Asserted Latency 1 BT
t
CRS2
TXEN Low to CRS De-Asserted Latency 1 BT
t
LAT
TXEN High to TXP/TXM Output (TX Latency) 7 BT
Table 4. 100BaseT MII Transmit Timing Parameters
KS8737 Micrel
KS8737 24 August 2003
RXP/RXM
RXD[3:0]
RXER
CRS
t
CR
S1
t
CRS2
RXDV
t
RLAT
t
SU
t
HD
Start of
Stream
End of
Stream
RXC
t
WL
t
WH
t
P
Figure 4. 100BaseT MII Receive Timing
Symbol Parameter Min Typ Max Units
t
P
RXC Period 40 ns
t
WL
RXC Pulse Width 20 ns
t
WH
RXC Pulse Width 20 ns
t
SU
RXD [3:0], RXER, RXDV Set-Up to Rising Edge of RXC 20 ns
t
HD
RXD [3:0], RXER, RXDV Hold from Rising Edge of RXC 20 ns
t
RLAT
CRS to RXD Latency, 4B or 5B Aligned 4 BT
t
CRS1
“Start of Stream” to CSR Asserted 140 ns
t
CRS2
“End of Stream” to CSR De-Asserted 170 ns
Table 5. 100BaseT MII Receive Timing Parameters
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

KS8737-EVAL

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BOARD EVAL EXPERIMENT FOR KS8737
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