參數(shù)資料
型號(hào): MPC8544CVTAQJB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-783
文件頁數(shù): 50/120頁
文件大?。?/td> 1321K
代理商: MPC8544CVTAQJB
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
35
Enhanced Three-Speed Ethernet (eTSEC), MII Management
Figure 16 shows the MII transmit AC timing diagram.
Figure 16. MII Transmit AC Timing Diagram
8.6.2
MII Receive AC Timing Specifications
Table 33 provides the MII receive AC timing specifications.
Figure 17 provides the AC test load for eTSEC.
Figure 17. eTSEC AC Test Load
Table 33. MII Receive AC Timing Specifications
At recommended operating conditions with L/TVDD of 3.3 V ± 5%.or 2.5V ± 5%.
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Notes
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 (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 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).
TX_CLK
TXD[3:0]
tMTKHDX
tMTX
tMTXH
tMTXR
tMTXF
TX_EN
TX_ER
Output
Z0 = 50 Ω
LVDD/2
RL = 50 Ω
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