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Timing Diagrams
296
NS7520 Hardware Reference, Rev. D 03/2006
Ethernet timing
Operating conditions:
Ethernet timing parameters
Temperature: -15.00 (min) 110.00 (max)
Voltage: 1.60 (min) 1.40 (max)
Output load: 25.0pf
Input drive: CMOS buffer
Num Description Min Max Unit
44 TXCLK high to TXD*, TXEN, TXER valid 11.5 ns
45 RXD*, RXER, RXDV, TXCOL, RXCRS valid to RXCLK high
(setup)
3ns
46 RXCLK high to RXD*, RXER, RXDV, TXCOL, RXCRS hold
time
2ns
49 MDC high to MDIO valid 50 ns
47 MDIO valid to MDC high (setup) 3 ns
48 MDC high to MDIO hold time 3 ns
50 RXCLK high to RSPF* valid 15.5 ns
52 REJECT* valid to RXCLK high (setup) 3 ns
53 REJECT* valid from RXCLK high (hold) 1.5 ns