參數(shù)資料
型號(hào)： PIC32MX575F256L-80I/BG
廠商： Microchip Technology
文件頁(yè)數(shù)： 39/64頁(yè)
文件大?。?/td> 0K
描述： IC MCU 32BIT 256KB FLASH 121XBGA
特色產(chǎn)品： 32-Bit PIC? Microcontroller
PIC32 32-Bit MCU Families
標(biāo)準(zhǔn)包裝： 184
系列： PIC® 32MX
核心處理器： MIPS32? M4K?
芯體尺寸： 32-位
速度： 80MHz
連通性： CAN，I²C，SPI，UART/USART，USB OTG
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，DMA，POR，PWM，WDT
程序存儲(chǔ)器容量： 256KB（256K x 8）
程序存儲(chǔ)器類(lèi)型： 閃存
RAM 容量： 64K x 8
電壓 - 電源 (Vcc/Vdd)： 2.3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 16x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 121-TFBGA
包裝： 托盤(pán)
產(chǎn)品目錄頁(yè)面： 650 (CN2011-ZH PDF)
PIC32MX
DS61145K-page 44
2007-2012 Microchip Technology Inc.
17.3
Algorithm
An example of a high-level algorithm for calculating the
checksum for a PIC32 device is illustrated in Figure 17-1
to demonstrate one method to derive a checksum. This
is merely an example of how the actual calculations can
be accomplished, the method that is ultimately used is
left to the discretion of the software developer.
As stated earlier, the PIC32 checksum is calculated as
the 32-bit summation of all bytes (8-bit quantities) in
program
Flash,
boot
Flash
(except
device
Configuration Words), the Device ID register with
applicable mask, and the device Configuration Words
with applicable masks.
Next, the 2’s complement of the summation is
calculated. This final 32-bit number is presented as the
checksum.
The mask values of the device Configuration and
Device ID registers are derived as described in the
Another noteworthy point is that the last four 32-bit
quantities in boot Flash are the device Configuration
registers. An arithmetic AND operation of these device
Configuration register values is performed with the
appropriate mask value, before adding their bytes to
the checksum.
Similarly, an arithmetic AND operation of the Device ID
register is performed with the appropriate mask value,
before adding its bytes to the checksum.
FIGURE 17-1:
HIGH-LEVEL ALGORITHM FOR CHECKSUM CALCULATION
pic32_checksum
Read Program Flash, Boot Flash (including DEVCFG
registers) and DEVID register in tempBuffer
Apply DEVCFG and DEVID masks to appropriate
locations in tempBuffer
tmpChecksum (32-bit quantity) = 0
Finish processing all
bytes (8-bit quantities) in
tempBuffer?
tmpChecksum = tempChecksum + Current Byte Value
(8-bit quantity) in tmpBuffer
Checksum (32-bit quantity) = 2’s complement
of tmpChecksum
Done
No
Yes
相關(guān)PDF資料
PDF描述
VI-2VN-IX-F1 CONVERTER MOD DC/DC 18.5V 75W
PIC17C44-16/PT IC MCU OTP 8KX16 PWM 44TQFP
PIC17C44-16/PQ IC MCU OTP 8KX16 PWM 44-MQFP
VI-2VM-IX-F3 CONVERTER MOD DC/DC 10V 75W
ADG719BRT-REEL7 IC SWITCH SPDT SOT23-6
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC32MX575F256L-80IPF 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:PIC32MX575FXXXX USB, CAN and Ethernet 32-bit Flash Microcontroller
PIC32MX575F256L-80IPT 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:PIC32MX575FXXXX USB, CAN and Ethernet 32-bit Flash Microcontroller
PIC32MX575F256L-80V/BG 功能描述:32位微控制器 - MCU 256KB 64KBRM USB-OTG CAN 80MHz 10BIT RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線(xiàn)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
PIC32MX575F256L-80V/PF 功能描述:32位微控制器 - MCU 256KB 64KBRM USB-OTG CAN 80MHz 10BIT RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線(xiàn)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
PIC32MX575F256L-80V/PT 功能描述:32位微控制器 - MCU 256KB 64KBRM USB-OTG CAN 80MHz 10BIT RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線(xiàn)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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*