Designing Boards with Atmel AT89C51,AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test. Recent improvements in chips and testers have made it possible for the tester to begin taking over the role tradi-tionally assigned to the PROM program-mer. Instead of having a PROM pro- grammer write nonvolatile memories before assembling the board, the in-cir- cuit tester Writes them during in-circuit testing operations. Many Teradyne Z18- series testers are now in use loading code into nonvolatile memories, micro- controllers and in-circuit programmable logic devices. The purpose of this note is to explain how the Z18 approaches the writing task for Atmel AT89C series IC’s, so that designers of boards using these chips can get the best results.
上传时间： 2013-11-17
上传用户：xiaozhiqban
Luminary Micro Stellaris™ microcontrollers that are equipped with an analog-to-digital converter(ADC), use an innovative sequence-based sampling architecture designed to be extremely flexible,yet easy to use. This application note describes the sampling architecture of the ADC. Sinceprogrammers can configure Stellaris microcontrollers either through the powerful StellarisFamilyDriver Library or through direct Writes to the device's control registers, this application note describesboth methods. The information presented in this document is intended to complement the ADCchapter of the device datasheet, and assumes the reader has a basic understanding of howADCsfunction.
标签： Microcontr Stellaris Using the
上传时间： 2013-10-14
上传用户：blans
Designing Boards with Atmel AT89C51, AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test:Recent improvements in chips andtesters have made it possible for thetester to begin taking over the role traditionallyassigned to the PROM programmer.Instead of having a PROM programmerwrite nonvolatile memoriesbefore assembling the board, the in-circuittester Writes them during in-circuittesting operations. Many Teradyne Z18-series testers are now in use loadingcode into nonvolatile memories, microcontrollersand in-circuit programmable logic devices. The purpose of this note is to explain how the Z18 approaches the writing task for Atmel AT89C series IC’s,so that designers of boards using these chips can get the best results.
标签： Designing Boards Atmel with
上传时间： 2013-11-20
上传用户：lijianyu172
//芯片资料请到www.elecfans.com查找 //DS1820 C51 子程序//这里以11.0592M晶体为例，不同的晶体速度可能需要调整延时的时间//sbit DQ =P2^1;//根据实际情况定义端口 typedef unsigned char byte;typedef unsigned int word; //延时void delay(word useconds){ for(;useconds>0;useconds--);} //复位byte ow_reset(void){ byte presence; DQ = 0; //pull DQ line low delay(29); // leave it low for 480us DQ = 1; // allow line to return high delay(3); // wait for presence presence = DQ; // get presence signal delay(25); // wait for end of timeslot return(presence); // presence signal returned} // 0=presence, 1 = no part //从 1-wire 总线上读取一个字节byte read_byte(void){ byte i; byte value = 0; for (i=8;i>0;i--) { value>>=1; DQ = 0; // pull DQ low to start timeslot DQ = 1; // then return high delay(1); //for (i=0; i<3; i++); if(DQ)value|=0x80; delay(6); // wait for rest of timeslot } return(value);} //向 1-WIRE 总线上写一个字节void write_byte(char val){ byte i; for (i=8; i>0; i--) // Writes byte, one bit at a time { DQ = 0; // pull DQ low to start timeslot DQ = val&0x01; delay(5); // hold value for remainder of timeslot DQ = 1; val=val/2; } delay(5);} //读取温度char Read_Temperature(void){ union{ byte c[2]; int x; }temp; ow_reset(); write_byte(0xCC); // Skip ROM write_byte(0xBE); // Read Scratch Pad temp.c[1]=read_byte(); temp.c[0]=read_byte(); ow_reset(); write_byte(0xCC); //Skip ROM write_byte(0x44); // Start Conversion return temp.x/2;}
上传时间： 2013-11-03
上传用户：hongmo
The Virtex™-4 user access register (USR_ACCESS_VIRTEX4) is a 32-bit register thatprovides direct access to bitstream data by the FPGA fabric. It is useful for loadingPowerPC™ 405 (PPC405) processor caches and/or other data into the FPGA after the FPGAhas been configured, thus achieving partial reconfiguration. The USR_ACCESS_VIRTEX4register is programmed through the bitstream with a command that Writes a series of 32-bitwords.
标签： USR_ACCESS PowerPC XAPP 719
上传时间： 2013-11-13
上传用户：我累个乖乖
The Virtex™-4 user access register (USR_ACCESS_VIRTEX4) is a 32-bit register thatprovides direct access to bitstream data by the FPGA fabric. It is useful for loadingPowerPC™ 405 (PPC405) processor caches and/or other data into the FPGA after the FPGAhas been configured, thus achieving partial reconfiguration. The USR_ACCESS_VIRTEX4register is programmed through the bitstream with a command that Writes a series of 32-bitwords.
标签： USR_ACCESS PowerPC XAPP 719
上传时间： 2013-12-23
上传用户：yuanwenjiao
XMDS is a code generator that integrates equations. You write them down in human readable form in a XML file, and it goes away and Writes and compiles a C++ program that integrates those equations as fast as it can possibly be done in your architecture.
标签： integrates generator equations readable
上传时间： 2014-11-27
上传用户：hebmuljb
IEEE1394Diag is a GUI application that presents a graphical view of an IEEE1394 network and provides the ability to perform common 1394 operations such as async reads, Writes, isoc listens and talks, as well as configuration rom browsing of all nodes present on a bus.
标签： IEEE 1394 application graphical
上传时间： 2015-04-02
上传用户：familiarsmile
IEEE1394Diag is a GUI application that presents a graphical view of an IEEE1394 network and provides the ability to perform common 1394 operations such as async reads, Writes, isoc listens and talks, as well as configuration rom browsing of all nodes pres
标签： IEEE 1394 application graphical
上传时间： 2014-12-03
上传用户：123啊
This a simple bootloader for AT91SAM7{S,X}{64,128,256} processors. It permits you to download new code to the device over USB. This bootrom is installed at address 0x00000000 in the ARM, which means that it is the first piece of code to execute after reset. At startup, it waits for a few seconds to see if the downloader is trying to connect. If not, then the bootloader gives up control and jumps to your program. If the downloader is trying to connect, then the bootloader receives the new program over USB and Writes it into flash.
标签： bootloader processors download permits
上传时间： 2015-11-30
上传用户：shus521
