參數(shù)資料
型號(hào): 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(yè)數(shù): 76/112頁(yè)
文件大?。?/td> 1294K
代理商: MPC8544VTARJ
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 0
66
Freescale Semiconductor
High-Speed Interfaces
Figure 43 shows the PCI output AC timing conditions.
Figure 43. PCI Output AC Timing Measurement Condition
16 High-Speed Interfaces
This section describes the common DC electrical specifications for the PCI Express of the MPC8544E.
16.1
DC Requirements for SerDes Reference Clocks
The SerDes differential reference clock signals are SD_REF_CLK and, SD_REF_CLK:
Each differential clock input has a 50-
Ω termination to GND. The reference clock must be able to
drive this termination. The input is AC-coupled on chip following the termination.
The amplitude of the clock must be at least a 400-mV differential peak-peak for single-ended
clock. If driven differentially, each signal wire needs to drive ±100 mV around common mode
voltage.
The differential reference clock (SD_REF_CLK/SD_REF_CLK) input is HCSL compatible DC
coupled or LVDS compatible with AC coupling.
Figure 44. Driver and Receiver of SerDes (PCI Express and SD_REF_CLK/SD_REF_CLK)
CLK
Output Delay
tPCKHOV
High-Impedance
tPCKHOZ
Output
Driver
50
Ω
50
Ω
Serial Data Out
Input
Amp
Serial Data In
50
Ω
50
Ω
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