參數(shù)資料
型號: MPC8544VTARJ
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 533 MHz, MICROPROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件頁數(shù): 40/112頁
文件大?。?/td> 1294K
代理商: MPC8544VTARJ
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
33
Enhanced Three-Speed Ethernet (eTSEC), MII Management
Figure 12 provides the AC test load for eTSEC.
Figure 12. eTSEC AC Test Load
Figure 13 shows the GMII receive AC timing diagram.
Figure 13. GMII Receive AC Timing Diagram
8.4
SGMII AC Timing Specifications
This section describes the SGMII transmit and receive AC timing specifications. Transmitter and receiver
characteristics are measured at the transmitter outputs (SD2_TX[n] and SD2_TX[n]) or at the receiver
inputs (SD2_RX[n] and SD2_RX[n]) as depicted in Figure 15, respectively.
8.4.1
SGMII Transmit AC Timing Specifications
Table 31 provides the SGMII transmit AC timing targets. A source synchronous clock is not provided.
RX_CLK clock fall time (80%–20%)
tGRXF
——
1.0
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, tGRDVKH symbolizes GMII receive
timing (GR) with respect to the time data input signals (D) reaching the valid state (V) relative to the tRX clock reference (K)
going to the high state (H) or setup time. Also, tGRDXKL symbolizes GMII receive timing (GR) with respect to the time data
input signals (D) went invalid (X) relative to the tGRX 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 tGRX represents the GMII (G) receive (RX) clock. For rise and fall times, the latter convention
is used with the appropriate letter: R (rise) or F (fall).
Table 30. GMII Receive AC Timing Specifications (continued)
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Notes
Output
Z0 = 50 Ω
LVDD/2
RL = 50 Ω
RX_CLK
RXD[7:0]
tGRDXKH
tGRX
tGRXH
tGRXR
tGRXF
tGRDVKH
RX_DV
RX_ER
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