參數(shù)資料
型號(hào)： SPC5200CBV466B
廠商： FREESCALE SEMICONDUCTOR INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 466 MHz, MICROPROCESSOR, PBGA272
封裝： 27 X 27 MM, 1.27 MM PITCH, HALIDE FREE, PLASTIC, BGA-272
文件頁(yè)數(shù)： 66/80頁(yè)
文件大?。?/td> 788K
代理商： SPC5200CBV466B
System Design Information
MPC5200B Data Sheet, Rev. 0.6
Freescale Semiconductor
69
Figure 51. Supply Voltage Sequencing
The relationship between VDD_IO_MEM and VDD_IO is non-critical during power-up and power-down
sequences. Both VDD_IO_MEM (2.5 V or 3.3 V) and VDD_IO are specified relative to VDD_CORE.
5.1.1
Power Up Sequence
If VDD_IO/VDD_IO_MEM are powered up with the VDD_CORE at 0V, the sense circuits in the I/O pads
will cause all pad output drivers connected to the VDD_IO/VDD_IO_MEM to be in a high-impedance
state. There is no limit to how long after VDD_IO/VDD_IO_MEM powers up before VDD_CORE must
power up. VDD_CORE should not lead the VDD_IO, VDD_IO_MEM or PLL_AVDD by more than 0.4
V during power ramp up or there will be high current in the internal ESD protection diodes. The rise times
on the power supplies should be slower than 1 microsecond to avoid turning on the internal ESD protection
clamp diodes.
The recommended power up sequence is as follows:
Use one microsecond or slower rise time for all supplies.
VDD_CORE/PLL_AVDD and VDD_IO/VDD_IO_MEM should track up to 0.9 V and then separate for
the completion of ramps with VDD_IO/VDD_IO_MEM going to the higher external voltages. One way
to accomplish this is to use a low drop-out voltage regulator.
1.5V
2.5V
3.3V
0
DC
Pow
er
Supply
V
o
ltage
VDD_IO,
VDD_IO_MEM (SDR)
VDD_IO_MEM (DDR)
VDD_CORE,
PLL_AVDD
Note:
1. VDD_CORE should not exceed VDD_IO, VDD_IO_MEM or PLL_AVDD by more
than 0.4 V at any time, including power-up.
2. It is recommended that VDD_CORE/PLL_AVDD should track
VDD_IO/VDD_IO_MEM up to 0.9 V then separate for completion of ramps.
3. Input voltage must not be greater than the supply voltage (VDD_IO)
VDD_IO_MEM, VDD_CORE, or PLL_AVDD) by more than 0.5 V at any time,
1
2
Time
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PDF描述
MPC5200CVR466B 32-BIT, 400 MHz, MICROPROCESSOR, PBGA272
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SPC5200CVR400R2 功能描述:IC MPU 32BIT 400MHZ 272-PBGA RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:MPC52xx 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類(lèi)型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類(lèi)型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤(pán)
SPC5200VVR266B 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SDRAM/DDR Memory Controller
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