参数资料
型号: MCIMX257CJM4A
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
封装: 17 X 17 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-400
文件页数: 64/154页
文件大小: 1498K
代理商: MCIMX257CJM4A
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
Freescale Semiconductor
17
Figure 2 shows the power-up sequence diagram. After POR_B is asserted, Core VDD and NVDDx can be
powered up. After Core VDD and NVDDx are stable, the analog supplies can be powered up.
Figure 2. Power-Up Sequence Diagram
3.2.2
Power-Down Sequence
There are no special requirements for the power-down sequence. All power supplies can be shut down at
the same time.
3.2.3
SRTC DryIce Power-Up/Down Sequence
In order to guarantee DryIce power-loss protection, which includes that SRTC time is kept during
power-down; in addition to having the proper capacitor placed on the NVCC_DRYICE output pin, users
must follow the specific power-up/down sequence.
For users who want to utilize the DryIce power-loss protection feature, the following power-up sequence
is recommended:
1. Assert Power on reset (POR).
2. Turn on NVCC_CRM.
3. At any time from step 2 and to step 4, turn on other digital I/O power suppliers NVCCx.
4. Turn on digital logic domain QVDD no less than 1 ms and no greater than 32 ms after
NVCC_CRM reaches 90 % of 3.3 V. Step 2 and step 4 order are critical for proper power-loss
protection.
NOTE
This is to guarantee that POR is stable already at NVCC_CRM/QVDD
power domain interface before QVDD is on, and POR instantly propagates
to QVDD domain after QVDD is on.
Analog Supplies
POR_B
QVDD and NVDD
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相关代理商/技术参数
参数描述
MCIMX257CJM4A 制造商:Freescale Semiconductor 功能描述:IC
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MCIMX257CVM4 功能描述:处理器 - 专门应用 SENNA IMX25 INDUST RoHS:否 制造商:Freescale Semiconductor 类型:Multimedia Applications 核心:ARM Cortex A9 处理器系列:i.MX6 数据总线宽度:32 bit 最大时钟频率:1 GHz 指令/数据缓存: 数据 RAM 大小:128 KB 数据 ROM 大小: 工作电源电压: 最大工作温度:+ 95 C 安装风格:SMD/SMT 封装 / 箱体:MAPBGA-432
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