參數資料
型號： MCIMX255AJM4
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
封裝： 17 X 17 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-400
文件頁數： 49/140頁
文件大?。?/td> 1416K
代理商： MCIMX255AJM4
i.MX25 Applications Processor for Automotive Products, Rev. 8
16
Freescale Semiconductor
3.2
Supply Power-Up/Power-Down Requirements and Restrictions
Any i.MX25 board design must comply with the power-up and power-down sequence guidelines given in
this section to ensure reliable operation of the device. Recommended power-up and power-down
sequences are given in the following subsections.
CAUTION
Deviations from the guidelines in this section may result in the following
situations:
Excessive current during power-up phase
Prevention of the device from booting
Irreversible damage to the i.MX25 (worst-case scenario)
NOTE
For security applications, the coin battery must be connected during both
power-up and power-down sequences to ensure that security keys are not
unintentionally erased.
3.2.1
Power-Up Sequence
The following power-up sequence is recommended:
1. Assert power on reset (POR).
2. Turn on digital logic domain and I/O power supplies VDDn and NVCCx.
3. Turn on all other analog power supplies, including USBPHY1_VDDA_BIAS,
USBPHY1_UPLL_VDD, USBPHY1_VDDA, USBPHY2_VDD, OSC24M_VDD,
MPPLL_VDD, UPLL_VDD, NVCC_ADC, and FUSEVDD (FUSEVDD is tied to GND if fuses
are not being programmed). The minimum time between turning on each power supply is the time
it takes for the previous supply to be stable.
4. Negate the POR signal.
NOTE
The user is advised to connect FUSEVDD to GND except when fuses
are being programmed, in order to prevent unintentional blowing of
fuses.
Other power-up sequences may be possible; however, the above
sequence has been verified and is recommended.
There is a 1-ms minimum time between supplies coming up, and a 1-ms
minimum time between POR_B assert and deassert.
相關PDF資料
PDF描述
MCIMX251AVM4 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
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相關代理商/技術參數
參數描述
MCIMX255AJM4A 功能描述:處理器 - 專門應用 IMX25 1.2 AUTO RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數據總線寬度:32 bit 最大時鐘頻率:1 GHz 指令/數據緩存: 數據 RAM 大小:128 KB 數據 ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風格:SMD/SMT 封裝 / 箱體:MAPBGA-432
MCIMX255AJM4AR2 功能描述:處理器 - 專門應用 IMX25 1.2 AUTO RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數據總線寬度:32 bit 最大時鐘頻率:1 GHz 指令/數據緩存: 數據 RAM 大小:128 KB 數據 ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風格:SMD/SMT 封裝 / 箱體:MAPBGA-432
MCIMX255AVM4 功能描述:處理器 - 專門應用 SENNA IMX25 1.1 AUTO RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數據總線寬度:32 bit 最大時鐘頻率:1 GHz 指令/數據緩存: 數據 RAM 大小:128 KB 數據 ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風格:SMD/SMT 封裝 / 箱體:MAPBGA-432
MCIMX257CJM4 功能描述:處理器 - 專門應用 IMX25 INDUSTRIAL RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數據總線寬度:32 bit 最大時鐘頻率:1 GHz 指令/數據緩存: 數據 RAM 大小:128 KB 數據 ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風格:SMD/SMT 封裝 / 箱體:MAPBGA-432
MCIMX257CJM4A 功能描述:處理器 - 專門應用 IMX25 1.2 INDUST RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數據總線寬度:32 bit 最大時鐘頻率:1 GHz 指令/數據緩存: 數據 RAM 大小:128 KB 數據 ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風格:SMD/SMT 封裝 / 箱體:MAPBGA-432
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