mpc8314e Freescale Semiconductor, Inc, mpc8314e Datasheet - Page 27
mpc8314e
Manufacturer Part Number
mpc8314e
Description
Powerquicc Ii Pro Processor Hardware Specifications
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MPC8314E.pdf
(106 pages)
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Figure 12
9.2.2.2
Table 28
Figure 13
Freescale Semiconductor
At recommended operating conditions with LVDD of 3.3 V ± 300 mv
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
REF_CLK clock fall time V
Note:
1. The symbols used for timing specifications herein follow the pattern of t
(reference)(state)
symbolizes RMII receive timing (RMR) with respect to the time data input signals (D) reach the valid state (V) relative to the
t
respect to the time data input signals (D) went invalid (X) relative to the t
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
times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
RMX
clock reference (K) going to the high (H) state or setup time. Also, t
provides the RMII receive AC timing specifications.
provides the AC test load.
shows the RMII transmit AC timing diagram.
RMII Receive AC Timing Specifications
for inputs and t
REF_CLK
Parameter/Condition
TXD[1:0]
TX_EN
MPC8314E PowerQUICC
IL
(min) to V
IH
Output
(max) to V
(first two letters of functional block)(reference)(state)(signal)(state)
IH
Table 28. RMII Receive AC Timing Specifications
(max)
Figure 12. RMII Transmit AC Timing Diagram
t
IL
RMXH
(min)
t
RMX
Z
Figure 13. AC Test Load
™
0
II Pro Processor Hardware Specifications, Rev. 0
= 50 Ω
RMX
represents the RMII (RM) reference (X) clock. For rise and fall
t
t
RMTKHDX
RMXH
Symbol
t
t
t
RMRDVKH
RMRDXKH
RMXF
t
t
t
RMXR
RMXF
RMX
/t
RMX
1
RMRDXKL
(first three letters of functional block)(signal)(state)
RMX
R
L
t
clock reference (K) going to the low (L) state or
RMXR
Ethernet: Three-Speed Ethernet, MII Management
= 50 Ω
Min
4.0
2.0
1.0
1.0
35
symbolizes RMII receive timing (RMR) with
—
for outputs. For example, t
NVDD
Typ
20
—
—
—
—
—
/
2
Max
4.0
4.0
65
—
—
—
RMRDVKH
Unit
ns
ns
ns
ns
ns
%
27