參數(shù)資料
型號(hào)： MCF5235CVM100
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 100 MHz, RISC PROCESSOR, PBGA256
封裝： ROHS COMPLIANT, MAPBGA-256
文件頁(yè)數(shù)： 3/48頁(yè)
文件大?。?/td> 666K
代理商： MCF5235CVM100
Design Recommendations
MCF523x Integrated Microprocessor Hardware Specification, Rev. 4
Freescale Semiconductor
11
5.2.1.2
Power Down Sequence
If VDD is powered down first, then sense circuits in the I/O pads cause all output drivers to be in a high
impedance state. There is no limit on how long after VDD powers down before OVDD/VDDPLL must power
down. VDD should not lag OVDD or VDDPLL 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 VDD to 0 V.
2. Drop OVDD/VDDPLL supplies.
5.3
Decoupling
Place the decoupling caps as close to the pins as possible, but they can be outside the footprint of
the package.
0.1
μF and 0.01 μF at each supply input
5.4
Buffering
Use bus buffers on all data/address lines for all off-board accesses and for all on-board accesses
when excessive loading is expected. See Section 7, “Electrical Characteristics.”
5.5
Pull-up Recommendations
Use external pull-up resistors on unused inputs. See pin table.
5.6
Clocking Recommendations
Use a multi-layer board with a separate ground plane.
Place the crystal and all other associated components as close to the EXTAL and XTAL (oscillator
pins) as possible.
Do not run a high frequency trace around crystal circuit.
Ensure that the ground for the bypass capacitors is connected to a solid ground trace.
Tie the ground trace to the ground pin nearest EXTAL and XTAL. This prevents large loop currents
in the vicinity of the crystal.
Tie the ground pin to the most solid ground in the system.
Do not connect the trace that connects the oscillator and the ground plane to any other circuit
element. This tends to make the oscillator unstable.
Tie XTAL to ground when an external oscillator is clocking the device.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCF5235CVM100J 功能描述:32位微控制器 - MCU V2CORE 64KSRAM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MCF5235CVM150 功能描述:IC MPU 32BIT COLDF 256-MAPBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MCF523x 標(biāo)準(zhǔn)包裝:330 系列:- 核心處理器:- 芯體尺寸:8/16-位 速度:40MHz 連通性:UART/USART 外圍設(shè)備:DMA，PWM，WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:- 程序存儲(chǔ)器類型:外部程序存儲(chǔ)器 EEPROM 大小:- RAM 容量:- 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:100-BQFP 包裝:管件
MCF5235CVM150 制造商:Freescale Semiconductor 功能描述:Microprocessor IC
MCF5235CVM150J 功能描述:32位微控制器 - MCU V2CORE 64KSRAM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MCF5235CVM150J 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU 150 MHz 256-BGA
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