参数资料
型号: MPC8377EWLANB
厂商: Freescale Semiconductor
文件页数: 47/127页
文件大小: 0K
描述: ACCESS POINT/ROUTER MPC8377
标准包装: 1
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
26
Freescale Semiconductor
8.2.1.2
MII Receive AC Timing Specifications
This table provides the MII receive AC timing specifications.
This figure provides the AC test load for eTSEC.
Figure 8. eTSEC AC Test Load
Table 27. MII Receive AC Timing Specifications
At recommended operating conditions with LVDD of 3.3 V ± 5%.
Parameter
Symbol1
Min
Typical
Max
Unit
Input low voltage
VIL
——
0.7
V
Input high voltage
VIH
1.9
V
RX_CLK clock period 10 Mbps
tMRX
400
ns
RX_CLK clock period 100 Mbps
tMRX
—40
ns
RX_CLK duty cycle
tMRXH/tMRX
35
65
%
RXD[3:0], RX_DV, RX_ER setup time to RX_CLK
tMRDVKH
10.0
ns
RXD[3:0], RX_DV, RX_ER hold time to RX_CLK
tMRDXKH
10.0
ns
RX_CLK clock rise time (20%–80%)
tMRXR
1.0
4.0
ns
RX_CLK clock fall time (80%–20%)
tMRXF
1.0
4.0
ns
Note:
1. The symbols used for timing specifications herein follow the pattern of t(first two 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, tMRDVKH
symbolizes MII receive timing (MR) with respect to the time data input signals (D) reach the valid state (V) relative to the
tMRX clock reference (K) going to the high (H) state or setup time. Also, tMRDXKL symbolizes MII receive timing (GR) with
respect to the time data input signals (D) went invalid (X) relative to the tMRX 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 tMRX represents the MII (M) receive (RX) clock. For rise and fall times,
the latter convention is used with the appropriate letter: R (rise) or F (fall).
Output
Z0 = 50 Ω
LVDD/2
RL = 50 Ω
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