mpc8314e Freescale Semiconductor, Inc, mpc8314e Datasheet - Page 26

• Manufacturer Part Number: mpc8314e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Ethernet: Three-Speed Ethernet, MII Management
Figure 11
9.2.2
This section describes the RMII transmit and receive AC timing specifications.
9.2.2.1
This section describes the RMII transmit and receive AC timing specifications.
RMII transmit AC timing specifications.
26
At recommended operating conditions with LVDD of 3.3 V ± 300 mv
REF_CLK clock
REF_CLK duty cycle
REF_CLK to RMII data TXD[1:0], TX_EN delay
REF_CLK data clock rise V
REF_CLK data clock fall V
Note:
1. The symbols used for timing specifications herein follow the pattern of t
(reference)(state)
symbolizes RMII transmit timing (RMT) for the time t
(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
times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
shows the MII receive AC timing diagram.
RMII AC Timing Specifications
RMII Transmit AC Timing Specifications
for inputs and t
RXD[3:0]
RX_CLK
Parameter/Condition
Figure 11. MII Receive AC Timing Diagram RMII AC Timing Specifications
RX_DV
RX_ER
MPC8314E PowerQUICC
IH
IL
(max) to V
(min) to V
(first two letters of functional block)(reference)(state)(signal)(state)
Table 27. RMII Transmit AC Timing Specifications
t
t
IH
IL
MRXH
MRDVKH
(min)
(max)
t
MRX
™
II Pro Processor Hardware Specifications, Rev. 0
RMX
Valid Data
RMX
clock reference (K) going high (H) until data outputs (D) are invalid
represents the RMII(RM) reference (X) clock. For rise and fall
t
t
RMXH/
Symbol
t
MRXF
RMTKHDX
t
t
t
RMXR
RMXF
RMX
t
RMX
1
(first three letters of functional block)(signal)(state)
t
MRDXKH
t
MRXR
Min
1.0
1.0
35
—
2
for outputs. For example, t
Typ
20
—
—
—
—
Table 27
Freescale Semiconductor
provides the
Max
4.0
4.0
65
10
—
RMTKHDX
Unit
ns
ns
ns
ns
%