ppc8572elpxavnd Freescale Semiconductor, Inc, ppc8572elpxavnd Datasheet - Page 33

• Manufacturer Part Number: ppc8572elpxavnd
• Description: Mpc8572e Powerquicc Iii Integrated Communications Processors
• Manufacturer: Freescale Semiconductor, Inc

Figure 9
8.2.2.2
Table 27
Figure 10
Freescale Semiconductor
At recommended operating conditions with LV
RX_CLK clock period
RX_CLK duty cycle
RXD[7:0], RX_DV, RX_ER setup time to RX_CLK
RXD[7:0], RX_DV, RX_ER hold time to RX_CLK
RX_CLK clock rise (20%-80%)
RX_CLK clock fall time (80%-20%)
Note:
1. The symbols used for timing specifications herein follow the pattern of t
2. Guaranteed by design.
for inputs and t
receive timing (GR) with respect to the time data input signals (D) reaching the valid state (V) relative to the t
reference (K) going to the high state (H) or setup time. Also, t
the time data input signals (D) went invalid (X) relative to the t
Note that, in general, the clock reference symbol representation is based on three letters representing the clock of a particular
functional. For example, the subscript of t
convention is used with the appropriate letter: R (rise) or F (fall).
shows the GMII transmit AC timing diagram.
provides the GMII receive AC timing specifications.
provides the AC test load for eTSEC.
GMII Receive AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
GTX_CLK
Parameter/Condition
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
TXD[7:0]
TX_EN
TX_ER
Output
Table 27. GMII Receive AC Timing Specifications
Figure 9. GMII Transmit AC Timing Diagram
t
tG
GTXH
DD
TKHDV
/TV
GRX
Figure 10. eTSEC AC Test Load
DD
t
GTX
Z
represents the GMII (G) receive (RX) clock. For rise and fall times, the latter
of 2.5/ 3.3 V ± 5%.
0
= 50 Ω
t
GRX
Symbol
GRXH
GRDXKL
t
t
t
GRDXKH
GRDVKH
t
t
GTXF
GRXR
GRXF
t
GRX
clock reference (K) going to the low (L) state or hold time.
/t
t
GTKHDX
GRX
2
2
for outputs. For example, t
symbolizes GMII receive timing (GR) with respect to
(first two letters of functional block)(signal)(state) (reference)(state)
1
R
Ethernet: Enhanced Three-Speed Ethernet (eTSEC)
L
t
GTXR
= 50 Ω
Min
2.0
40
—
—
—
0
LV
DD
Typ
8.0
—
—
—
—
—
/2
GRDVKH
symbolizes GMII
Max
1.0
1.0
—
60
—
—
RX
clock
Unit
ns
ns
ns
ns
ns
ns
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