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| 型號(hào)： | MPC8378EVRAJDA |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 266 MHz, MICROPROCESSOR, PBGA689 |
| 封裝： | 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689 |
| 文件頁(yè)數(shù)： | 103/125頁(yè) |
| 文件大?。?/td> | 894K |
| 代理商： | MPC8378EVRAJDA |
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MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
79
20
High-Speed Serial Interfaces (HSSI)
The MPC8378E features two serializer/deserializer (SerDes) interfaces to be used for high-speed serial interconnect
applications. See Table 1 for the interfaces supported.
This section describes the common portion of SerDes DC electrical specifications, which is the DC requirement for SerDes
reference clocks. The SerDes data lane’s transmitter and receiver reference circuits are also shown.
20.1
Signal Terms Definition
The SerDes utilizes differential signaling to transfer data across the serial link. This section defines terms used in the description
and specification of differential signals.
Figure 54 shows how the signals are defined. For illustration purpose, only one SerDes lane is used for description. The figure
shows waveform for either a transmitter output (SDn_TX and SDn_TX) or a receiver input (SDn_RX and SDn_RX). Each
signal swings between A volts and B volts where A > B.
Using this waveform, the definitions are as follows. To simplify illustration, the following definitions assume that the SerDes
transmitter and receiver operate in a fully symmetrical differential signaling environment.
Single-Ended Swing
The transmitter output signals and the receiver input signals SDn_TX, SDn_TX, SDn_RX and SDn_RX each have a
peak-to-peak swing of A – B volts. This is also referred as each signal wire’s single-ended swing.
Differential Output Voltage, VOD (or Differential Output Swing):
The differential output voltage (or swing) of the transmitter, VOD, is defined as the difference of the two
complimentary output voltages: VSDn_TX – VSDn_TX. The VOD value can be either positive or negative.
Differential Input Voltage, VID (or Differential Input Swing):
The differential input voltage (or swing) of the receiver, VID, is defined as the difference of the two complimentary
input voltages: VSDn_RX – VSDn_RX. The VID value can be either positive or negative.
Differential Peak Voltage, VDIFFp
The peak value of the differential transmitter output signal or the differential receiver input signal is defined as
differential peak voltage, VDIFFp = |A – B| volts.
Differential Peak-to-Peak, VDIFFp-p
Since the differential output signal of the transmitter and the differential input signal of the receiver each range from
A – B to –(A – B) volts, the peak-to-peak value of the differential transmitter output signal or the differential receiver
input signal is defined as differential peak-to-peak voltage, VDIFFp-p =2 VDIFFp = 2 |(A – B)| volts, which is twice
of differential swing in amplitude, or twice of the differential peak. For example, the output differential peak-peak
voltage can also be calculated as VTX-DIFFp-p = 2 |VOD|.
Differential Waveform
The differential waveform is constructed by subtracting the inverting signal (SDn_TX, for example) from the
non-inverting signal (SDn_TX, for example) within a differential pair. There is only one signal trace curve in a
differential waveform. The voltage represented in the differential waveform is not referenced to ground. Refer to
Figure 63 as an example for differential waveform.
Common Mode Voltage, Vcm
The common mode voltage is equal to one 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 =(VSDn_TX +VSDn_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. Sometimes it may be even different between the receiver input and driver output circuits
within the same component. It is also referred as the DC offset in some occasion.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC8378EVRAJF | 功能描述:微處理器 - MPU PBGA W/ ENCR RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| MPC8378EVRAJFA | 功能描述:微處理器 - MPU 8378 PBGA ST PbFr W/ENC RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| MPC8378EVRAJGA | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8378EVRALDA | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8378EVRALFA | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
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