參數(shù)資料
型號： MSC8256TVT1000B
廠商： Freescale Semiconductor
文件頁數(shù)： 22/70頁
文件大小： 0K
描述： IC DSP 6 CORE 1GHZ 783FCPBGA
標(biāo)準(zhǔn)包裝： 1
系列： StarCore
類型： SC3850 內(nèi)核
接口： 以太網(wǎng)，I²C，PCI，RGMII，串行 RapidIO，SGMII，SPI，UART/USART
時鐘速率： 1.0GHz
非易失內(nèi)存： ROM（96 kB）
芯片上RAM： 576kB
電壓 - 輸入/輸出： 2.50V
電壓 - 核心： 1.00V
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 783-BBGA，F(xiàn)CBGA
供應(yīng)商設(shè)備封裝： 783-FCPBGA（29x29）
包裝： 托盤
Electrical Characteristics
MSC8256 Six-Core Digital Signal Processor Data Sheet, Rev. 6
Freescale Semiconductor
29
SR[1–2]_TX) or a receiver input (SR[1–2]_RX and SR[1–2]_RX). Each signal swings between A volts and B volts where
A>B.
Using this waveform, the definitions are listed in Table 10. To simplify the illustration, the definitions assume that the SerDes
transmitter and receiver operate in a fully symmetrical differential signalling environment.
Figure 4. Differential Voltage Definitions for Transmitter or Receiver
Table 10. Differential Signal Definitions
Term
Definition
Single-Ended Swing
The transmitter output signals and the receiver input signals SR[1–2]_TX, SR[1–2]_TX, SR[1–2]_RX
and SR[1–2]_RX each have a peak-to-peak swing of A – B volts. This is also referred to 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: VSR[1–2]_TX – VSR[1–2]_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: VSR[1–2]_RX – VSR[1–2]_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 the 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 the 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 Swing, VID or VOD = A – B
A Volts
B Volts
Differential Peak Voltage, VDIFFp = |A – B|
Differential Peak-Peak Voltage, VDIFFpp = 2 × VDIFFp (not shown)
SR[1–2]_TX or
SR[1–2]_RX
SR[1–2]_TX or
SR[1–2]_RX
Vcm = (A + B)/2
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