參數(shù)資料
型號(hào): MPC8548ECVUAUG
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 1333 MHz, MICROPROCESSOR, CBGA783
封裝: 29 X 29 MM, 1 MM PITCH, FLIP CHIP, LEAD FREE, CERAMIC, BGA-783
文件頁數(shù): 118/142頁
文件大?。?/td> 1504K
代理商: MPC8548ECVUAUG
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
77
Serial RapidIO
17.3
Signal Definitions
LP-serial links use differential signaling. This section defines terms used in the description and
specification of differential signals. Figure 51 shows how the signals are defined. The figures show
waveforms for either a transmitter output (TD and TD) or a receiver input (RD and RD). Each signal
swings between A volts and B volts where A > B. Using these waveforms, the definitions are as follows:
1. The transmitter output signals and the receiver input signals TD, TD, RD, and RD each have a
peak-to-peak swing of A – B volts.
2. The differential output signal of the transmitter, VOD, is defined as VTD –VTD.
3. The differential input signal of the receiver, VID, is defined as VRD –VRD.
4. The differential output signal of the transmitter and the differential input signal of the receiver
each range from A – B to –(A – B) volts.
5. The peak value of the differential transmitter output signal and the differential receiver input
signal is A – B volts.
6. The peak-to-peak value of the differential transmitter output signal and the differential receiver
input signal is 2
× (A – B) volts.
Figure 51. Differential Peak–Peak Voltage of Transmitter or Receiver
To illustrate these definitions using real values, consider the case of a CML (current mode logic)
transmitter that has a common mode voltage of 2.25 V and each of its outputs, TD and TD, has a swing
that goes between 2.5 and 2.0 V. Using these values, the peak-to-peak voltage swing of the signals TD and
TD is 500 mVp-p. The differential output signal ranges between 500 and –500 mV. The peak differential
voltage is 500 mV. The peak-to-peak differential voltage is 1000 mVp-p.
17.4
Equalization
With the use of high speed serial links, the interconnect media will cause degradation of the signal at the
receiver. Effects such as Inter-Symbol Interference (ISI) or data dependent jitter are produced. This loss
can be large enough to degrade the eye opening at the receiver beyond what is allowed in the specification.
To negate a portion of these effects, equalization can be used. The most common equalization techniques
that can be used are:
A passive high pass filter network placed at the receiver. This is often referred to as passive
equalization.
The use of active circuits in the receiver. This is often referred to as adaptive equalization.
Differential Peak-to-Peak = 2
× (A – B)
A Volts
TD or RD
B Volts
相關(guān)PDF資料
PDF描述
MPC8548EVUAUG 32-BIT, 1333 MHz, MICROPROCESSOR, CBGA783
MPC8548PXAQJA 32-BIT, 1000 MHz, MICROPROCESSOR, PBGA783
MPC8548VTATHB 32-BIT, 1200 MHz, MICROPROCESSOR, PBGA783
MPC8548VUATH 32-BIT, 1200 MHz, MICROPROCESSOR, CBGA783
MPC8548VUATJB 32-BIT, 1200 MHz, MICROPROCESSOR, CBGA783
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MPC8548EHXAUJ 功能描述:微處理器 - MPU PQ38 8548E 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
MPC8548EHXAVH 制造商:Freescale Semiconductor 功能描述:MPU RISC 32BIT CMOS 1.5GHZ 1.8V/2.5V/3.3V - Bulk