參數(shù)資料
型號(hào): MPC8544EVTANGB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 800 MHz, RISC PROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-783
文件頁數(shù): 49/120頁
文件大小: 1321K
代理商: MPC8544EVTANGB
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
34
Freescale Semiconductor
Enhanced Three-Speed Ethernet (eTSEC), MII Management
Figure 15 shows the GMII receive AC timing diagram.
Figure 15. GMII Receive AC Timing Diagram
8.6
MII AC Timing Specifications
This section describes the MII transmit and receive AC timing specifications.
8.6.1
MII Transmit AC Timing Specifications
Table 32 provides the MII transmit AC timing specifications.
Table 32. MII Transmit 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
TX_CLK clock period 10 Mbps
tMTX
—400
ns
TX_CLK clock period 100 Mbps
tMTX
—40
ns
TX_CLK duty cycle
tMTXH/tMTX
35
65
%
TX_CLK to MII data TXD[3:0], TX_ER, TX_EN
delay
tMTKHDX
1
5
15
ns
TX_CLK data clock rise (20%–80%)
tMTXR
1.0
4.0
ns
TX_CLK data clock fall (80%–20%)
tMTXF
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, tMTKHDX symbolizes MII transmit
timing (MT) for the time tMTX clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in general,
the clock reference symbol representation is based on two to three letters representing the clock of a particular functional.
For example, the subscript of tMTX represents the MII(M) transmit (TX) clock. For rise and fall times, the latter convention is
used with the appropriate letter: R (rise) or F (fall).
RX_CLK
RXD[7:0]
tGRDXKH
tGRX
tGRXH
tGRXR
tGRXF
tGRDVKH
RX_DV
RX_ER
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