- 您现在的位置：买卖IC网 > PDF目录79629 > IS80C52CXXX-16:RD (ATMEL CORP) 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 PDF资料下载
参数资料
| 型号： | IS80C52CXXX-16:RD |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 51/134页 |
| 文件大小： | 3805K |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页当前第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页
23
8068U–AVR–06/2013
XMEGA A3
Not recommended for new designs -
Use XMEGA A3U series
12. System Control and Reset
12.1
Features
Multiple reset sources for safe operation and device reset
– Power-On Reset
– External Reset
– Watchdog Reset
The Watchdog Timer runs from separate, dedicated oscillator
– Brown-Out Reset
Accurate, programmable Brown-Out levels
– PDI reset
– Software reset
Asynchronous reset
– No running clock in the device is required for reset
Reset status register
12.2
Resetting the AVR
During reset, all I/O registers are set to their initial values. The SRAM content is not reset. Appli-
cation execution starts from the Reset Vector. The instruction placed at the Reset Vector should
be an Absolute Jump (JMP) instruction to the reset handling routine. By default the Reset Vector
address is the lowest Flash program memory address, ‘0’, but it is possible to move the Reset
Vector to the first address in the Boot Section.
The I/O ports of the AVR are immediately tri-stated when a reset source goes active. The reset
functionality is asynchronous, so no running clock is required to reset the device. After the
device is reset, the reset source can be determined by the application by reading the Reset Sta-
tus Register.
12.3
Reset Sources
12.3.1
Power-On Reset
The MCU is reset when the supply voltage VCC is below the Power-on Reset threshold voltage.
12.3.2
External Reset
The MCU is reset when a low level is present on the RESET pin.
12.3.3
Watchdog Reset
The MCU is reset when the Watchdog Timer period expires and the Watchdog Reset is enabled.
The Watchdog Timer runs from a dedicated oscillator independent of the System Clock. For
more details see ”WDT - Watchdog Timer” on page 24.
12.3.4
Brown-Out Reset
The MCU is reset when the supply voltage VCC is below the Brown-Out Reset threshold voltage
and the Brown-out Detector is enabled. The Brown-out threshold voltage is programmable.
12.3.5
PDI reset
The MCU can be reset through the Program and Debug Interface (PDI).
相关PDF资料 |
PDF描述 |
|---|---|
| IS80C52CXXX-16SHXXX:R | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 |
| IS80C52CXXX-25:D | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQCC44 |
| IS80C52CXXX-30SHXXX:RD | 8-BIT, MROM, 30 MHz, MICROCONTROLLER, PQCC44 |
| IS80C52CXXX-30SHXXX:R | 8-BIT, MROM, 30 MHz, MICROCONTROLLER, PQCC44 |
| IS80C52CXXX-L16:R | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IS80C86 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| IS80C86-2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| IS80C86-2R2490 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| IS80C88 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| IS80C88-2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
发布紧急采购，3分钟左右您将得到回复。