Datasheet

R01DS0052EJ0140 Rev.1.40 Page 129 of 150
2014.07.16
RX62N Group, RX621 Group 5. Electrical Characteristics
Figure 5.44 REF50CK and RMII Signal Timing
Figure 5.45 RMII Transmission Timing
Figure 5.46 RMII Reception Timing (Normal Operation)
Tck
REF50CK
Tckr
Tckf
Tco Tsu Thd
SignalSignal
Signal
transitions
Signal
transitions
Signal
transitions
TfTr
90%
50%
10%
90%
50%
10%
RMII_xxxx *
1
Note1. RMII_TXD_EN, RMII_TXD1, RMII_TXD0, RMII_CRS_DV, RMII_RXD1, RMII_RXD0, RMII_RX_ER
Tck
Tco
DATA
Tco
SFD CRC
RMII_TXD1
RMII_TXD0
RMII_TXD_EN
REF50CK
Preamble
DATA
SFD
CRCPreamble
Thd
Tsu
RMII_RXD1
RMII_RXD0
RMII_RX_ER
RMII_CRS_DV
REF50CK
L
Thd
Tsu