mpc8379e Freescale Semiconductor, Inc, mpc8379e Datasheet - Page 28

• Manufacturer Part Number: mpc8379e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Enhanced Three-Speed Ethernet (eTSEC)
Figure 11
8.2.3
This section describes the RMII transmit and receive AC timing specifications.
8.2.3.1
The RMII transmit AC timing specifications are in
At recommended operating conditions with LV
28
REF_CLK clock period
REF_CLK duty cycle
REF_CLK peak-to-peak jitter
Rise time REF_CLK (20%–80%)
(At Transmitter)
shows the RGMII and RTBI AC timing and multiplexing diagrams.
RXD[8:5][3:0]
RXD[7:4][3:0]
TXD[8:5][3:0]
TXD[7:4][3:0]
RMII AC Timing Specifications
GTX_CLK
RMII Transmit AC Timing Specifications
(At PHY)
(At PHY)
RX_CLK
RX_CTL
TX_CLK
TX_CTL
Parameter
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
Figure 11. RGMII and RTBI AC Timing and Multiplexing Diagrams
Table 29. RMII Transmit AC Timing Specifications
DD
TXD[3:0]
RXD[3:0]
TXD[4]
RXD[4]
TXEN
RXDV
of 3.3 V ± 5%.
RXD[8:5]
RXD[7:4]
TXD[8:5]
TXD[7:4]
TXERR
RXERR
RXD[9]
TXD[9]
Symbol
Table
t
t
t
t
RMTH
RMTR
RMTJ
RMT
29.
1
t
t
SKRGT
SKRGT
t
RGTH
15.0
Min
1.0
35
—
Typical
20.0
t
RGT
50
—
—
Freescale Semiconductor
t
t
SKRGT
SKRGT
Max
25.0
250
2.0
65
Unit
ns
ps
ns
%