mpc8568e Freescale Semiconductor, Inc, mpc8568e Datasheet - Page 30

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

Ethernet Interface and MII Management
Timing diagrams for FIFO appear in
8.2.2
This section describes the GMII transmit and receive AC timing specifications.
8.2.2.1
Table 27
30
At recommended operating conditions with LV
GTX_CLK clock period
GTX_CLK duty cycle
GMII data TXD[7:0], TX_ER, TX_EN setup time
GTX_CLK to GMII data TXD[7:0], TX_ER, TX_EN delay
GTX_CLK data clock rise time (20%-80%)
GTX_CLK data clock fall time (80%-20%)
EC_GTX_CLK125 clock rise time (20%-80%)
EC_GTX_CLK125 clock fall time (80%-20%)
.
provides the GMII transmit AC timing specifications.
GTX_CLK
TXD[7:0]
TX_EN
TX_ER
RX_CLK
RXD[7:0]
RX_DV
RX_ER
MPC8568E/MPC8567E PowerQUICC III™ Integrated Processor Hardware Specifications, Rev. 0
GMII AC Timing Specifications
GMII Transmit AC Timing Specifications
Parameter/Condition
t
FIRH
t
FITH
Table 27. GMII Transmit AC Timing Specifications
Figure 7. FIFO Transmit AC Timing Diagram
Figure 8. FIFO Receive AC Timing Diagram
DD
t
t
FIR
of 3.3 V ± 5%.
Figure 7
FIT
t
FIRDV
t
FITDV
and
valid data
Figure
t
FIRDX
t
Symbol
GTXH
8.
t
t
GTKHDV
t
t
GTKHDX
t
t
GTXR
GTXF
G125R
G125F
t
GTX
t
FITDX
/t
GTX
2
2
1
t
FIRF
t
FITF
Min
2.5
0.5
45
—
—
—
—
—
t
FIRR
t
Typ
FITR
8.0
1.0
1.0
1.0
1.0
—
—
—
Freescale Semiconductor
Max
5.0
2.0
2.0
2.0
2.0
55
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
%