mpc8378 Freescale Semiconductor, Inc, mpc8378 Datasheet - Page 28

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mpc8378

Manufacturer Part Number
mpc8378
Description
Powerquicc Ii Pro Processor
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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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
MPC8377E 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
%

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