MPC8360E/MPC8358E PowerQUICC II Pro Processor Revision 2.x TBGA Silicon Hardware Specifications, Rev. 4
Freescale Semiconductor
35
UCC Ethernet Controller: Three-Speed Ethernet, MII Management
8.2.3.2
RMII Receive AC Timing Specifications
Table 32
provides the RMII receive AC timing specifications.
Figure 16
provides the AC test load.
Figure 16. AC Test Load
Figure 17
shows the RMII receive AC timing diagram.
Figure 17. RMII Receive AC Timing Diagram
Table 32. RMII Receive AC Timing Specifications
At recommended operating conditions with LV
DD
/OV
DD
of 3.3 V ± 10%.
Parameter/Condition
Symbol
1
Min
Typ
Max
Unit
REF_CLK clock period
t
RMX
—
20
—
ns
REF_CLK duty cycle
t
RMXH
/t
RMX
35
—
65
%
RXD[1:0], CRS_DV, RX_ER setup time to REF_CLK
t
RMRDVKH
4.0
—
—
ns
RXD[1:0], CRS_DV, RX_ER hold time to REF_CLK
t
RMRDXKH
2.0
—
—
ns
REF_CLK clock rise time
t
RMXR
1.0
—
4.0
ns
REF_CLK clock fall time
t
RMXF
1.0
—
4.0
ns
Note:
1. The symbols used for timing specifications follow the pattern of t
(first three letters of functional block)(signal)(state)(reference)(state)
for
inputs and t
(first two letters of functional block)(reference)(state)(signal)(state)
for outputs. For example, t
RMRDVKH
symbolizes RMII
receive timing (RMR) with respect to the time data input signals (D) reach the valid state (V) relative to the t
RMX
clock
reference (K) going to the high (H) state or setup time. Also, t
RMRDXKL
symbolizes RMII receive timing (RMR) with respect to
the time data input signals (D) went invalid (X) relative to the t
RMX
clock reference (K) going to the low (L) state or hold time.
Note that, in general, the clock reference symbol representation is based on three letters representing the clock of a particular
functional. For example, the subscript of t
RMX
represents the RMII (RM) reference (X) clock. For rise and fall times, the latter
convention is used with the appropriate letter: R (rise) or F (fall).
Output
Z
0
= 50
Ω
LV
DD
/2
R
L
= 50
Ω
REF_CLK
RXD[1:0]
t
RMRDXKH
t
RMX
t
RMXH
t
RMXR
t
RMXF
CRS_DV
RX_ER
t
RMRDVKH
Valid Data