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參數資料
| 型號： | MPC8569EVTAUNLB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | RISC PROCESSOR, PBGA783 |
| 封裝： | 29 X 29 MM, 1 MM PITCH, PLASTIC, BGA-783 |
| 文件頁數： | 104/126頁 |
| 文件大?。?/td> | 2847K |
| 代理商： | MPC8569EVTAUNLB |
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High-Speed SerDes Interfaces (HSSI)
MPC8569E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
79
signal trace curve in a differential waveform. The voltage represented in the differential waveform
is not referenced to ground. See Figure 43 as an example for differential waveform.
Common Mode Voltage, Vcm
The common mode voltage is equal to half of the sum of the voltages between each conductor of
a balanced interchange circuit and ground. In this example, for SerDes output,
Vcm_out =(VSD_TX +VSD_TX) ÷ 2 = (A + B) ÷ 2, which is the arithmetic mean of the two
complimentary output voltages within a differential pair. In a system, the common mode voltage
may often differ from one component’s output to the other’s input. It may be different between the
receiver input and driver output circuits within the same component. It is also referred to as the DC
offset on some occasions.
To illustrate these definitions using real values, consider the example of a current mode logic (CML) transmitter that has a
common mode voltage of 2.25 V and outputs, TD and TD. If these outputs have a swing from 2.0 V to 2.5 V, the peak-to-peak
voltage swing of each signal (TD or TD) is 500 mV p-p, which is referred to as the single-ended swing for each signal. Because
the differential signaling environment is fully symmetrical in this example, the transmitter output’s differential swing (VOD) has
the same amplitude as each signal’s single-ended swing. The differential output signal ranges between 500 mV and –500 mV.
In other words, VOD is 500 mV in one phase and –500 mV in the other phase. The peak differential voltage (VDIFFp) is 500 mV.
The peak-to-peak differential voltage (VDIFFp-p) is 1000 mV p-p.
2.9.2
SerDes Reference Clocks
The SerDes reference clock inputs are applied to an internal PLL whose output creates the clock used by the corresponding
SerDes lanes.The SerDes reference clock inputs are SD_REF_CLK and SD_REF_CLK for PCI Express, Serial RapidIO, and
SGMII interface, respectively.
The following sections describe the SerDes reference clock requirements and provide application information.
2.9.2.1
SerDes Spread Spectrum Clock Source Recommendations
SD_REF_CLK/SD_REF_CLK are designed to work with spread spectrum clock for PCI Express protocol only with the
spreading specification defined in Table 46. When using spread spectrum clocking for PCI Express, both ends of the link
partners should use the same reference clock. For best results, a source without significant unintended modulation must be used.
The spread spectrum clocking cannot be used if the same SerDes reference clock is shared with other non-spread spectrum
supported protocols. For example, if the spread spectrum clocking is desired on a SerDes reference clock for PCI Express and
the same reference clock is used for any other protocol such as SGMII/SRIO due to the SerDes lane usage mapping option,
spread spectrum clocking cannot be used at all.
2.9.2.2
SerDes Reference Clock Receiver Characteristics
The following figure shows a receiver reference diagram of the SerDes reference clocks.
Table 46. SerDes Spread Spectrum Clock Source Recommendations
At recommended operating conditions. See Table 3.
Parameter
Min
Max
Unit
Notes
Frequency modulation
30
33
kHz
—
Frequency spread
+0
–0.5
%
1
Note:
1. Only down spreading is allowed.
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相關代理商/技術參數 |
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| MPC8569VJAUNLB | 制造商:Freescale Semiconductor 功能描述:IC MPU PWRQUICC 1333MHZ 783FCBGA |
| MPC8569VTANKGB | 功能描述:數字信號處理器和控制器 - DSP, DSC 8569 ST 800/600/400 r2.1 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數:50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MPC8569VTAQLJB | 功能描述:數字信號處理器和控制器 - DSP, DSC 8569 ST 1067/667/533 r2.1 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數:50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MPC8569VTAUNLB | 功能描述:數字信號處理器和控制器 - DSP, DSC 8569 ST 1333/667/533 r2.1 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數:50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MPC8572CLVTAULD | 功能描述:微處理器 - MPU 1333 LOW PWR EXT TEMP RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數據總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數據 RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
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