Rainbow Electronics W90P710CDG - Manual (Page 520)

W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 521 - Revision B2
7.3.4 EMC RMII AC Characteristics
The signal timing characteristics conforms to the guidelines specified in IEEE Std. 802.3.
PHY_REFCLK
PHY_TXEN
PHY_TXD[1:0]
T
TXO
valid data
T
TXH
T
FREQ
T
RXS
T
RXH
PHY_RXERR
PHY_RXD[1:0]
PHY_CRSDV
T
DUTY
valid data
SYMBOL DESCRIPTION MIN TYP MAX UNIT
T
FREQ
RMII reference clock frequency 50 MHz
T
DUTY
RMII clock duty 35% 50% 65% ns
T
TXO
Transmit data output delay 5 - 15 ns
T
TXH
Transmit data hold time 2 - - ns
T
RXS
Receive data setup time 4 - - ns
T
RXH
Receive data hold time 2 - - ns