參數(shù)資料
型號(hào)： MC8641HX1000NE
廠商： Freescale Semiconductor
文件頁數(shù)： 61/130頁
文件大?。?/td> 0K
描述： IC DUAL CORE PROCESSOR 994-CBGA
標(biāo)準(zhǔn)包裝： 1
系列： MPC86xx
處理器類型： 32-位 MPC86xx PowerPC
速度： 1.0GHz
電壓： 0.95V
安裝類型： 表面貼裝
封裝/外殼： 994-BCBGA，F(xiàn)CCBGA
供應(yīng)商設(shè)備封裝： 994-FCCBGA（33x33）
包裝： 托盤
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
36
Freescale Semiconductor
Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.2.3.2
MII Receive AC Timing Specifications
Table 31 provides the MII receive AC timing specifications.
Figure 14 provides the AC test load for eTSEC.
Figure 14. eTSEC AC Test Load
Figure 15 shows the MII receive AC timing diagram.
Figure 15. MII Receive AC Timing Diagram
Table 31. MII Receive AC Timing Specifications
At recommended operating conditions with L/TVDD of 3.3 V ± 5%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
RX_CLK clock period 10 Mbps
tMRX
2,3
—400
—
ns
RX_CLK clock period 100 Mbps
tMRX
3
—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
2
1.0—
4.0ns
RX_CLK clock fall time (80%-20%)
tMRXF
2
1.0—
4.0ns
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).
2. Guaranteed by design.
3. ±100 ppm tolerance on RX_CLK frequency
Output
Z0 = 50 Ω
LVDD/2
RL = 50 Ω
RX_CLK
RXD[3:0]
tMRDXKL
tMRX
tMRXH
tMRXR
tMRXF
RX_DV
RX_ER
tMRDVKH
Valid Data
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