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參數(shù)資料
| 型號(hào)： | MSC8254TVT800B |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | 0-BIT, OTHER DSP, PBGA783 |
| 封裝： | 29 X 29 MM, LEAD FREE, PLASTIC, FCBGA-783 |
| 文件頁數(shù)： | 21/68頁 |
| 文件大小： | 909K |
| 代理商： | MSC8254TVT800B |
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MSC8254 Quad-Core Digital Signal Processor Data Sheet, Rev. 4
Electrical Characteristics
Freescale Semiconductor
28
2.5.1.4
DDR Reference Current Draw
Note:
Values when used at recommended operating conditions (see Table 3).
2.5.2
High-Speed Serial Interface (HSSI) DC Electrical Characteristics
The MSC8254 features an HSSI that includes two 4-channel SerDes ports used for high-speed serial interface applications (PCI
Express, Serial RapidIO interfaces, and SGMII). This section and its subsections describe the common portion of the SerDes
DC, including the DC requirements for the SerDes reference clocks and the SerDes data lane transmitter (Tx) and receiver (Rx)
reference circuits. The data lane circuit specifications are specific for each supported interface, and they have individual
subsections by protocol. The selection of individual data channel functionality is done via the Reset Configuration Word High
Register (RCWHR) SerDes Protocol selection fields (S1P and S2P). Specific AC electrical characteristics are defined in
2.5.2.1
Signal Term Definitions
The SerDes interface uses differential signaling to transfer data across the serial link. This section defines terms used in the
description and specification of differential signals. Figure 4 shows how the signals are defined. For illustration purposes only,
one SerDes lane is used in the description. Figure 4 shows the waveform for either a transmitter output (SR[1–2]_TX and
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.
Table 9. Current Draw Characteristics for MVREF
Parameter / Condition
Symbol
Min
Max
Unit
Current draw for MVREFn
DDR2 SDRAM
DDR3 SDRAM
IMVREFn
—
300
250
μA
Figure 4. Differential Voltage Definitions for Transmitter or Receiver
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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| MSC8256 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Six-Core Digital Signal Processor |
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| MSC8256SVT1000B | 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC DSPStarcore6-core R2.1 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):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(fēng)格:SMD/SMT |
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