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參數(shù)資料
| 型號： | M308B8FCGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP144 |
| 封裝： | 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 37/70頁 |
| 文件大?。?/td> | 1150K |
| 代理商： | M308B8FCGP |
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42
XMEGA D4 [DATASHEET]
8135P–AVR–01/2014
24.
CRC – Cyclic Redundancy Check Generator
24.1 Features
Cyclic redundancy check (CRC) generation and checking for
Communication data
Program or data in flash memory
Data in SRAM and I/O memory space
Integrated with flash memory and CPU
Automatic CRC of the complete or a selectable range of the flash memory
CPU can load data to the CRC generator through the I/O interface
CRC polynomial software selectable to
CRC-16 (CRC-CCITT)
CRC-32 (IEEE 802.3)
Zero remainder detection
24.2 Overview
A cyclic redundancy check (CRC) is an error detection technique test algorithm used to find accidental errors in data, and
it is commonly used to determine the correctness of a data transmission, and data present in the data and program
memories. A CRC takes a data stream or a block of data as input and generates a 16- or 32-bit output that can be
appended to the data and used as a checksum. When the same data are later received or read, the device or application
repeats the calculation. If the new CRC result does not match the one calculated earlier, the block contains a data error.
The application will then detect this and may take a corrective action, such as requesting the data to be sent again or
simply not using the incorrect data.
Typically, an n-bit CRC applied to a data block of arbitrary length will detect any single error burst not longer than n bits
(any single alteration that spans no more than n bits of the data), and will detect the fraction 1-2-n of all longer error
bursts. The CRC module in Atmel AVR XMEGA devices supports two commonly used CRC polynomials; CRC-16 (CRC-
CCITT) and CRC-32 (IEEE 802.3).
CRC-16:
CRC-32:
Polynomial:
x16+x12+x5+1
Hex value:
0x1021
Polynomial:
x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
Hex value:
0x04C11DB7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M308B8FGGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
| M308B8SGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU M16C FAMILY / M32C/80 SERIES |
| M308B8SGP#U5 | 功能描述:MCU ROMLESS 32K RAM 144-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:M16C™ M32C/80/8B 產(chǎn)品培訓(xùn)模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標準包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設(shè)備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲器容量:384KB（384K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M309 | 功能描述:折皺器 CRIMP TOOL HIGH POWER RoHS:否 制造商:Hirose Connector 類型: 描述/功能:Cable and Shield Crimper |
| M-309 | 制造商:Daniels Manufacturing Corporation (DMC) 功能描述:CRIMPER |
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