mpc8568e Freescale Semiconductor, Inc, mpc8568e Datasheet - Page 39

• Manufacturer Part Number: mpc8568e
• Description: Mpc8568e Powerquicc Iii Processor
• Manufacturer: Freescale Semiconductor, Inc

Figure 18
8.2.7
This section describes the RMII transmit and receive AC timing specifications.
8.2.7.1
The RMII transmit AC timing specifications are in
Freescale Semiconductor
At recommended operating conditions with LV
REF_CLK clock period
REF_CLK duty cycle
REF_CLK peak-to-peak jitter
Rise time REF_CLK (20%–80%)
Fall time REF_CLK (80%–20%)
(At Transmitter)
shows the RGMII and RTBI AC timing and multiplexing diagrams.
MPC8568E/MPC8567E PowerQUICC III™ Integrated Processor Hardware Specifications, Rev. 0
RXD[8:5][3:0]
RXD[7:4][3:0]
TXD[8:5][3:0]
TXD[7:4][3:0]
RMII AC Timing Specifications
RMII Transmit AC Timing Specifications
GTX_CLK
(At PHY)
(At PHY)
RX_CTL
RX_CLK
TX_CLK
TX_CTL
Parameter/Condition
Figure 18. RGMII and RTBI AC Timing and Multiplexing Diagrams
Table 35. RMII Transmit AC Timing Specifications
DD
RXD[3:0]
TXD[3:0]
RXD[4]
TXD[4]
TXEN
RXDV
of 3.3 V ± 5%.
RXD[8:5]
RXD[7:4]
TXD[8:5]
TXD[7:4]
RXERR
TXERR
RXD[9]
TXD[9]
Table
Symbol
t
t
t
t
t
RMTH
RMTR
RMTF
RMTJ
RMT
35.
1
t
t
SKRGT
SKRGT
t
RGTH
15.0
Min
1.0
1.0
35
—
Ethernet Interface and MII Management
20.0
Typ
50
—
—
—
t
RGT
Max
25.0
250
2.0
2.0
65
t
t
SKRGT
SKRGT
Unit
ns
ps
ns
ns
%
39