MPC8358 FREESCALE [Freescale Semiconductor, Inc], MPC8358 Datasheet - Page 30

• Manufacturer Part Number: MPC8358
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

UCC Ethernet Controller: Three-Speed Ethernet, MII Management
8.2.3
This section describes the RMII transmit and receive AC timing specifications.
8.2.3.1
Table 30
Figure 13
30
At recommended operating conditions with LV
REF_CLK clock
REF_CLK duty cycle
REF_CLK to RMII data TXD[1:0], TX_EN delay
REF_CLK data clock rise time, VIL(min) to VIH(max)
REF_CLK data clock fall time, VIH(max) to VIL(min)
Note:
1. The symbols used for timing specifications herein follow the pattern of t
(reference)(state)
t
outputs (D) are invalid (X). Note that, in general, 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
reference (X) clock. For rise and fall times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
RMTKHDX
MPC8358E PowerQUICC™ II Pro Processor Revision 2.1 PBGA Silicon Hardware Specifications, Rev. 1
provides the RMII transmit AC timing specifications.
shows the RMII transmit AC timing diagram.
RMII AC Timing Specifications
RMII Transmit AC Timing Specifications
symbolizes RMII transmit timing (RMT) for the time t
REF_CLK
TXD[1:0]
Parameter/Condition
for inputs and t
TX_EN
Table 30. RMII Transmit AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
Figure 13. RMII Transmit AC Timing Diagram
t
RMXH
DD
/ OV
t
RMX
DD
of 3.3 V ± 10%.
t
RMXH
t
t
Symbol
RMTKHDX
t
RMTKHDV
RMTKHDX
t
t
t
t
RMXR
RMXF
RMXF
RMX
/t
RMX
RMX
1
clock reference (K) going high (H) until data
(first three letters of functional block)(signal)(state)
t
RMXR
Min
1.0
1.0
35
—
—
2
for outputs. For example,
RMX
Typ
20
—
—
—
—
represents the RMII(RM)
Freescale Semiconductor
Max
4.0
4.0
65
10
—
—
Unit
ns
ns
ns
ns
%