MPC8533E_11 FREESCALE [Freescale Semiconductor, Inc], MPC8533E_11 Datasheet - Page 35

• Manufacturer Part Number: MPC8533E_11
• Description: MPC8533E PowerQUICC III Integrated Processor Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

8.5.5
This section describes the RMII transmit and receive AC timing specifications.
8.5.5.1
The RMII transmit AC timing specifications are in
Figure 19
Freescale Semiconductor
At recommended operating conditions with L/TV
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%)
REF_CLK to RMII data TXD[1:0], TX_EN delay
Note:
1. The symbols used for timing specifications follow the pattern of t
inputs and t
timing (MT) for the time t
the clock reference symbol representation is based on two to three letters representing the clock of a particular functional.
For example, the subscript of t
used with the appropriate letter: R (rise) or F (fall).
shows the RMII transmit AC timing diagram.
RMII AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
RMII Transmit AC Timing Specifications
Parameter/Condition
REF_CLK
MPC8533E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
TXD[1:0]
TX_EN
TX_ER
MTX
clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in general,
MTX
Table 33. RMII Transmit AC Timing Specifications
Figure 19. RMII Transmit AC Timing Diagram
represents the MII(M) transmit (TX) clock. For rise and fall times, the latter convention is
t
RMTH
DD
of 3.3 V ± 5% or 2.5 V ± 5%.
t
RMT
Symbol
t
t
t
RMTDX
t
t
RMTH
RMTR
t
RMTF
RMTJ
Table
RMT
t
t
RMTDX
RMTF
(first two letters of functional block)(signal)(state)(reference)(state)
1
for outputs. For example, t
33.
Enhanced Three-Speed Ethernet (eTSEC), MII Management
15.0
Min
1.0
1.0
1.0
35
—
t
RMTR
20.0
Typ
50
—
—
—
—
MTKHDX
Max
25.0
10.0
250
2.0
2.0
65
symbolizes MII transmit
Unit
ns
ps
ns
ns
ns
%
Notes
for
—
—
—
—
—
—
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