Altima AC101 Series, Manual, Page: 50 / 64

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AC101 Preliminary Data Sheet
06/04/01
B r o a d c o m
Page 40 Digital Timing Characteristics Document AC101-DS01-405-R¥¥¥¥¥
Figure 7: Management Data Interface Timing
100BASE-TX/FX MII T
RANSMIT
S
YSTEM
T
IMING
Table 41: 100BASE-TX/FX MII Transmit System Timing
Parameter SYM Conditions Min Typ Max Units
TX_CLK period tCK 39.998 40.000 40.002 ns
TX_CLK High period tCKH 18.000 20.000 22.000 ns
TX_CLK Low period tCKL 18.000 20.000 22.000 ns
TX_EN to /J/ tTJ - 40 180 ns
TX_EN sampled to
CRS tCSA RPTR is logic low - 40 180 ns
TX_EN sampled to
COL tCLA RPTR is logic low - 40 180 ns
!TX_EN to /T/ tTT - 40 180 ns
!TX_EN sampled to
!CRS tCSD RPTR is logic low - 40 180 ns
!TX_EN sampled to
!COL tCLD RPTR is logic low - 40 180 ns
TX Propagation Delay tTJ From TXD[3:0] to TXOP/N(FXTP/N) - 40 180 ns
TXD[3:0], TX_EN,
TX_ER Setup tTXS From rising edge of TX_CLK 10 - - ns
TXD[3:0], TX_EN,
TX_ER Hold tTXH From rising edge of TX_CLK 0 - - ns
!TX_EN to TX_EN tTX_TX 120 - - ns
MDC
MDIO
tMDCH
tMH tMS
tMDCL