During periods of low VCC, the EEPRO" />
參數(shù)資料
型號(hào): AT90S8515-8JC
廠商: Atmel
文件頁數(shù): 54/112頁
文件大?。?/td> 0K
描述: IC MCU 8K FLSH 8MHZ 44PLCC
標(biāo)準(zhǔn)包裝: 27
系列: AVR® 90S
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(4K x 16)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 512 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
46
AT90S8515
0841G–09/01
Prevent EEPROM
Corruption
During periods of low VCC, the EEPROM data can be corrupted because the supply volt-
age is too low for the CPU and the EEPROM to operate properly. These issues are the
same as for board level systems using the EEPROM and the same design solutions
should be applied.
An EEPROM data corruption can be caused by two situations when the voltage is too
low. First, a regular write sequence to the EEPROM requires a minimum voltage to
operate correctly. Second, the CPU itself can execute instructions incorrectly if the sup-
ply voltage for executing instructions is too low.
EEPROM data corruption can easily be avoided by following these design recommen-
dations (one is sufficient):
1.
Keep the AVR RESET active (low) during periods of insufficient power supply
voltage. This is best done by an external low VCC Reset Protection circuit, often
referred to as a Brown-out Detector (BOD). Please refer to application note AVR
180 for design considerations regarding power-on reset and low-voltage
detection.
2.
Keep the AVR core in Power-down Sleep mode during periods of low VCC. This
will prevent the CPU from attempting to decode and execute instructions, effec-
tively protecting the EEPROM registers from unintentional writes.
3.
Store constants in Flash memory if the ability to change memory contents from
software is not required. Flash memory cannot be updated by the CPU and will
not be subject to corruption.
相關(guān)PDF資料
PDF描述
PIC24FV16KA304-I/PT MCU 16KB FLASH 2KB RAM 44-TQFP
AT90S8515-8AC IC MCU 8K FLSH 8MHZ 44TQFP
PIC24FJ64GA002-E/SO IC PIC MCU FLASH 64K 28-SOIC
PIC16LF628-04I/SS IC MCU FLASH 2KX14 COMP 20SSOP
SFW24R-2STE1 SFW24R-2STE1-FFC/FPC CONN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT90S8515-8JI 功能描述:8位微控制器 -MCU 8K Flash 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90S8515-8PC 功能描述:8位微控制器 -MCU 8K Flash 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90S8515-8PI 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 8K Bytes In-System Programmable Flash
AT90S8515A-4AC 功能描述:IC MCU 8BIT 8KB FLASH 44TQFP 制造商:microchip technology 系列:AVR? 90S 包裝:托盤 零件狀態(tài):停產(chǎn) 核心處理器:AVR 核心尺寸:8-位 速度:4MHz 連接性:SPI,UART/USART 外設(shè):欠壓檢測(cè)/復(fù)位,POR,PWM,WDT I/O 數(shù):32 程序存儲(chǔ)容量:8KB(4K x 16) 程序存儲(chǔ)器類型:閃存 EEPROM 容量:512 x 8 RAM 容量:512 x 8 電壓 - 電源(Vcc/Vdd):2.7 V ~ 6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器類型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:44-TQFP 供應(yīng)商器件封裝:44-TQFP(10x10) 基本零件編號(hào):AT90S8515 標(biāo)準(zhǔn)包裝:160
AT90S8515A-4AI 功能描述:8位微控制器 -MCU 8 bit 8k byte RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT