參數(shù)資料
型號: MSC8256TVT1000B
廠商: Freescale Semiconductor
文件頁數(shù): 55/70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
Hardware Design Considerations
MSC8256 Six-Core Digital Signal Processor Data Sheet, Rev. 6
Freescale Semiconductor
59
3.2
Each global PLL power supply must have an external RC filter for the PLLn_AVDD input (see Figure 37) in which the
following components are defined as listed:
R = 5
Ω ± 5%
C1 = 10 F
± 10%, 0603, X5R, with ESL
0.5 nH, low ESL Surface Mount Capacitor.
C2 = 1.0 F
± 10%, 0402, X5R, with ESL
0.5 nH, low ESL Surface Mount Capacitor.
Note:
A higher capacitance value for C2 may be used to improve the filter as long as the other C2 parameters do not change.
All three PLLs can connect to a single supply voltage source (such as a voltage regulator) as long as the external RC filter is
applied to each PLL separately. For optimal noise filtering, place the circuit as close as possible to its PLLn_AVDD inputs.
.
Each SerDes PLL power supply must be filtered using a circuit similar to the one shown in Figure 38, to ensure stability of the
internal clock. For maximum effectiveness, the filter circuit should be placed as closely as possible to the SRn_PLL_AVDD ball
to ensure it filters out as much noise as possible. The ground connection should be near the SRn_PLL_AVDD ball. The 0.003
μF
capacitor is closest to the ball, followed by the two 2.2
μF capacitors, and finally the 1 Ω resistor to the board supply plane. The
Figure 37. PLL Supplies
MSC8156E
PLL0_AVDD
R
C1
C2
PLL1_AVDD
R
C1
C2
PLL2_AVDD
R
C1
C2
VDD Power Rail
(Voltage Regulator)
VSS
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