mpc8536e Freescale Semiconductor, Inc, mpc8536e Datasheet - Page 44

• Manufacturer Part Number: mpc8536e
• Description: Mpc8536e Powerquicctm Iii Integrated Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
2.9.2.2
This section describes the GMII transmit and receive AC timing specifications.
2.9.2.2.1
Table 28
44
At recommended operating conditions with L/TV
GTX_CLK clock period
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%)
Notes:
1. The symbols used for timing specifications herein follow the pattern t
2. Data valid t
for inputs and t
transmit timing (GT) with respect to the t
signals (D) reaching the valid state (V) to state or setup time. Also, t
to the t
time. 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
the latter convention is used with the appropriate letter: R (rise) or F (fall).
Max Hold)
provides the GMII transmit AC timing specifications.
GTX
RX_CLK
RXD[7:0]
RX_DV
RX_ER
clock reference (K) going to the high state (H) relative to the time date input signals (D) going invalid (X) or hold
GTKHDV
GMII AC Timing Specifications
GMII Transmit AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
MPC8536E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 2
Parameter/Condition
to GTX_CLK Min Setup time is a function of clock period and max hold time. (Min Setup = Cycle time -
t
FIRH
Table 28. GMII Transmit AC Timing Specifications
Figure 15. FIFO Receive AC Timing Diagram
DD
GTX
t
FIR
of 3.3 V ± 5%.
clock reference (K) going to the high state (H) relative to the time date input
t
FIRDV
GTX
valid data
represents the GMII(G) transmit (TX) clock. For rise and fall times,
t
FIRDX
Symbol
GTKHDX
t
GTKHDX
t
t
t
GTXR
for outputs. For example, t
GTXF
GTK
(first two letters of functional block)(signal)(state) (reference)(state)
symbolizes GMII transmit timing (GT) with respect
1
3
t
FIRF
Min
0.5
—
—
—
t
FIRR
Typ
8.0
—
—
—
GTKHDV
Freescale Semiconductor
symbolizes GMII
Max
5.0
1.0
1.0
—
Unit
ns
ns
ns
ns