- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄25639 > MR83C154XXX-25P883 (ATMEL CORP) 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44 PDF資料下載
參數(shù)資料
| 型號： | MR83C154XXX-25P883 |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 36/80頁 |
| 文件大?。?/td> | 5152K |
| 代理商： | MR83C154XXX-25P883 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁當前第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁
227
2466T–AVR–07/10
ATmega16(L)
On-chip Debug
Related Register in
I/O Memory
On-chip Debug
Register – OCDR
The OCDR Register provides a communication channel from the running program in the micro-
controller to the debugger. The CPU can transfer a byte to the debugger by writing to this
location. At the same time, an Internal Flag; I/O Debug Register Dirty – IDRD – is set to indicate
to the debugger that the register has been written. When the CPU reads the OCDR Register the
7 LSB will be from the OCDR Register, while the MSB is the IDRD bit. The debugger clears the
IDRD bit when it has read the information.
In some AVR devices, this register is shared with a standard I/O location. In this case, the OCDR
Register can only be accessed if the OCDEN Fuse is programmed, and the debugger enables
access to the OCDR Register. In all other cases, the standard I/O location is accessed.
Refer to the debugger documentation for further information on how to use this register.
Using the JTAG
Programming
Capabilities
Programming of AVR parts via JTAG is performed via the 4-pin JTAG port, TCK, TMS, TDI and
TDO. These are the only pins that need to be controlled/observed to perform JTAG program-
ming (in addition to power pins). It is not required to apply 12V externally. The JTAGEN Fuse
must be programmed and the JTD bit in the MCUSR Register must be cleared to enable the
JTAG Test Access Port.
The JTAG programming capability supports:
Flash programming and verifying
EEPROM programming and verifying
Fuse programming and verifying
Lock bit programming and verifying
The Lock bit security is exactly as in Parallel Programming mode. If the Lock bits LB1 or LB2 are
programmed, the OCDEN Fuse cannot be programmed unless first doing a chip erase. This is a
security feature that ensures no back-door exists for reading out the content of a secured
device.
The details on programming through the JTAG interface and programming specific JTAG
instructions are given in the section “Programming via the JTAG Interface” on page 278.
Bibliography
For more information about general Boundary-scan, the following literature can be consulted:
IEEE: IEEE Std. 1149.1-1990. IEEE Standard Test Access Port and Boundary-scan
Architecture, IEEE, 1993
Colin Maunder: The Board Designers Guide to Testable Logic Circuits, Addison-Wesley,
1992
Bit
7
6
543210
MSB/IDRD
LSB
OCDR
Read/Write
R/W
Initial Value
0
000000
相關PDF資料 |
PDF描述 |
|---|---|
| MS80C51-12D | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44 |
| MT80C51T-16R | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| MD80C32E-20SC | 8-BIT, 20 MHz, MICROCONTROLLER, CDIP40 |
| MC80C52XXX-16SHXXX | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CDIP40 |
| MD80C52EXXX-20 | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CDIP40 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MR850 | 功能描述:整流器 3.0 Amp 50 Volt 150ns RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Standard Recovery Rectifiers 配置: 反向電壓:100 V 正向電壓下降: 恢復時間:1.2 us 正向連續(xù)電流:2 A 最大浪涌電流:35 A 反向電流 IR:5 uA 安裝風格:SMD/SMT 封裝 / 箱體:DO-221AC 封裝:Reel |
| MR850 _AY _10001 | 制造商:PanJit Touch Screens 功能描述: |
| MR850 R0 | 制造商:SKMI/Taiwan 功能描述:Diode Switching 50V 3A 2-Pin DO-201AD T/R |
| MR850_ R2 _10001 | 制造商:PanJit Touch Screens 功能描述: |
| MR850_09 | 制造商:PANJIT 制造商全稱:Pan Jit International Inc. 功能描述:SOFT RECOVERY, FAST SWITCHING PLASTIC RECTIFIER |
發(fā)布緊急采購，3分鐘左右您將得到回復。