MPC8321E Freescale Semiconductor, Inc, MPC8321E Datasheet - Page 22

• Manufacturer Part Number: MPC8321E
• Description: Mpc8321e Powerquicc Ii Pro Processor
• Manufacturer: Freescale Semiconductor, Inc

Ethernet and MII Management
8.2.2.1
Table 23
Figure 10
8.2.2.2
Table 24
22
At recommended operating conditions with OV
At recommended operating conditions with OV
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 follow the pattern of t
REF_CLK clock period
REF_CLK duty cycle
RXD[1:0], CRS_DV, RX_ER setup time to REF_CLK
RXD[1:0], CRS_DV, RX_ER hold time to REF_CLK
REF_CLK clock rise V
inputs and t
transmit timing (RMT) for the time t
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
convention is used with the appropriate letter: R (rise) or F (fall).
MPC8323E PowerQUICC™ II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
provides the RMII transmit AC timing specifications.
provides the RMII receive AC timing specifications.
shows the RMII transmit AC timing diagram.
(first two letters of functional block)(reference)(state)(signal)(state)
RMII Transmit AC Timing Specifications
RMII Receive AC Timing Specifications
Parameter/Condition
Parameter/Condition
REF_CLK
TXD[1:0]
TX_EN
IL
(min) to V
IH
IL
(max) to V
(min) to V
Table 25. RMII Transmit AC Timing Specifications
IH
Table 26. RMII Receive AC Timing Specifications
(max)
Figure 10. RMII Transmit AC Timing Diagram
RMX
IH
IL
t
RMXH
(min)
(max)
DD
DD
clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in
RMX
of 3.3 V ± 10%.
of 3.3 V ± 10%.
t
RMX
represents the RMII(RM) reference (X) clock. For rise and fall times, the latter
t
t
RMXH
t
RMXH
t
t
t
Symbol
Symbol
RMTKHDX
RMTKHDX
RMRDVKH
RMRDXKH
t
t
RMXF
t
t
t
RMXR
RMXF
t
RMXR
RMX
RMX
(first three letters of functional block)(signal)(state)(reference)(state)
for outputs. For example, t
/t
/t
RMX
RMX
1
1
t
RMXR
Min
Min
1.0
1.0
4.0
2.0
1.0
35
35
—
—
2
Typical
Typical
RMTKHDX
20
20
—
—
—
—
—
—
—
—
Freescale Semiconductor
symbolizes RMII
Max
Max
4.0
4.0
4.0
65
10
65
—
—
—
—
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
%
%
for