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| 型号： | MCF52277CVM160 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 43/46页 |
| 文件大小： | 0K |
| 描述： | IC MCU 32BIT 166.67MHZ 196MAPBGA |
| 产品培训模块： | MCF5227x LCD Processors |
| 标准包装： | 126 |
| 系列： | MCF5227x |
| 核心处理器： | Coldfire V2 |
| 芯体尺寸： | 32-位 |
| 速度： | 166.67MHz |
| 连通性： | CAN，EBI/EMI，I²C，SPI，SSI，UART/USART，USB OTG |
| 外围设备： | DMA，LCD，PWM，WDT |
| 输入/输出数： | 55 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 128K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.4 V ~ 1.6 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 196-LBGA |
| 包装： | 托盘 |
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MCF5227x ColdFire Microprocessor Data Sheet, Rev. 8
Hardware Design Considerations
Freescale Semiconductor
6
3.3
ADC Power Filtering
To minimize noise, an external filters is required for the ADCVDD power pin. The filter shown in Figure 4 should be connected
between the board EVDD and the ADCVDD pin. The resistor and capacitors should be placed as close to the dedicated ADCVDD
pin as possible.
Figure 4. ADC VDD Power Filter
3.4
Supply Voltage Sequencing
The relationship between SDVDD and EVDD is non-critical during power-up and power-down sequences. Both SDVDD (2.5V
or 3.3V) and EVDD are specified relative to IVDD.
3.4.1
Power Up Sequence
If EVDD/SDVDD are powered up with IVDD at 0 V, then the sense circuits in the I/O pads will cause all pad output drivers
connected to the EVDD/SDVDD to be in a high impedance state. There is no limit on how long after EVDD/SDVDD powers up
before IVDD must powered up. IVDD should not lead the EVDD, SDVDD or PLLVDD 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
500 us to avoid turning on the internal ESD protection clamp diodes.
3.4.2
Power Down Sequence
If IVDD/PLLVDD are powered down first, then sense circuits in the I/O pads will cause all output drivers to be in a high
impedance state. There is no limit on how long after IVDD and PLLVDD power down before EVDD or SDVDD must power
down. IVDD should not lag EVDD, SDVDD, or PLLVDD going low by more than 0.4 V during power down or there will be
undesired high current in the ESD protection diodes. There are no requirements for the fall times of the power supplies.
The recommended power down sequence is as follows:
1.
Drop IVDD/PLLVDD to 0 V.
2.
Drop EVDD/SDVDD supplies.
Board EVDD
0
Ω
0.1 F
ADC VDD Pin
10 F
GND
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCF52277CVM160J | 功能描述:32位微控制器 - MCU 32-BIT MICRO W/LCD-TOUCH RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| MCF5232 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Microprocessor Hardware Specification |
| MCF5232160QFP | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Microprocessor Hardware Specification |
| MCF5232196MAPBGA | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Microprocessor Hardware Specification |
| MCF5232CAB80 | 功能描述:微处理器 - MPU MCF5232 V2CORE 64KSRAM RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
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