MPC8321E Freescale Semiconductor, Inc, MPC8321E Datasheet - Page 21

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

Figure 8
Figure 9
8.2.2
This section describes the RMII transmit and receive AC timing specifications.
Freescale Semiconductor
At recommended operating conditions with OV
RX_CLK clock fall time V
Note:
1. The symbols used for timing specifications follow the pattern of t
inputs and t
timing (MR) with respect to the time data input signals (D) reach the valid state (V) relative to the t
going to the high (H) state or setup time. Also, t
signals (D) went invalid (X) relative to the t
the clock reference symbol representation is based on three letters representing the clock of a particular functional. For
example, the subscript of t
with the appropriate letter: R (rise) or F (fall).
MPC8323E PowerQUICC™ II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
provides the AC test load.
shows the MII receive AC timing diagram.
RMII AC Timing Specifications
(first two letters of functional block)(reference)(state)(signal)(state)
RXD[3:0]
RX_CLK
Parameter/Condition
RX_DV
RX_ER
IH
(max) to V
Output
Table 24. MII Receive AC Timing Specifications (continued)
MRX
represents the MII (M) receive (RX) clock. For rise and fall times, the latter convention is used
IL
t
Figure 9. MII Receive AC Timing Diagram
t
(min)
MRXH
MRDVKH
DD
of 3.3 V ± 10%.
MRX
t
MRX
Z
clock reference (K) going to the low (L) state or hold time. Note that, in general,
MRDXKL
Figure 8. AC Test Load
0
= 50 Ω
Valid Data
symbolizes MII receive timing (GR) with respect to the time data input
t
Symbol
MRXF
t
(first two letters of functional block)(signal)(state)(reference)(state)
MRXF
for outputs. For example, t
1
R
L
t
MRDXKH
t
= 50 Ω
MRXR
Min
1.0
OV
DD
Typical
MRDVKH
/2
—
Ethernet and MII Management
MRX
symbolizes MII receive
clock reference (K)
Max
4.0
Unit
ns
for
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