Difference between revisions of "JTAG"

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[http://listlolush.idilis.ro/styles/testo-del.htm testo del cover della canzone di goldrake] [http://avroraplus68.idilis.ro/description/ettore-bassi.htm ettore bassi] [http://avroraplus68.idilis.ro/description/smart-cdi.htm smart cdi] [http://listmuchachas.idilis.ro/distributori-caffe/ distributori caffe per ufficio] [http://yage2006.idilis.ro/blog/tom-tom33/ tom tom go 5] [http://listlolush.idilis.ro/styles/radeon-ati2.htm radeon ati 9600 256mb] [http://yage2006.idilis.ro/blog/congelatori-ad/ congelatori ad incasso] [http://seepelicio.idilis.ro/film-erotici1.htm film erotici da scaricare] [http://yage2006.idilis.ro/blog/nerd-she/ nerd she wants to move] [http://yage2006.idilis.ro/blog/cambio-automatico1/ cambio automatico] [http://avroraplus68.idilis.ro/description/queens.htm queens] [http://yage2006.idilis.ro/blog/immaggini-incidenti/ immaggini incidenti] The Joint Test Action Group (JTAG) standardized a 5 pin boundary-scan test port as IEEE Std. 1149.1, "Standard Test Access Port and Boundary-Scan Architecture".
+
The Joint Test Action Group (JTAG) standardized a 5 pin boundary-scan test port as IEEE Std. 1149.1, "Standard Test Access Port and Boundary-Scan Architecture".
  
 
While originally intended for boundary-scan testing of PCB assemblies, to replace bed-of-nails testing, the JTAG port included in many popular microprocessors is also often used for programming and debugging.
 
While originally intended for boundary-scan testing of PCB assemblies, to replace bed-of-nails testing, the JTAG port included in many popular microprocessors is also often used for programming and debugging.
Line 33: Line 33:
 
     19  User 1  20  Vcc
 
     19  User 1  20  Vcc
  
     1 3.3 V    2 3.3 V
+
     1 +3.3 V    2 +3.3 V
 
     3 nTRST    4 GND
 
     3 nTRST    4 GND
 
     5 TDI      6 GND
 
     5 TDI      6 GND

Revision as of 11:21, 20 October 2007

The Joint Test Action Group (JTAG) standardized a 5 pin boundary-scan test port as IEEE Std. 1149.1, "Standard Test Access Port and Boundary-Scan Architecture".

While originally intended for boundary-scan testing of PCB assemblies, to replace bed-of-nails testing, the JTAG port included in many popular microprocessors is also often used for programming and debugging.

"If you have information on how to connect a JTAG probe to a Nokia phone, please let me know."

There are five pins:

  • TCK/clock
  • TMS/mode select
  • TDI/data in
  • TDO/data out
  • TRST/reset (optional), when driven low, resets the internal state machine.

Except for TCK, all other JTAG lines should be pulled high via a resistor.


WARNING: unconfirmed pinout. Please add links to pinout standard.

20 Pin JTAG PinOut

Which one of these is right?

   Pin Function Pin Function
   1   TRST     2   GND
   3   TDO      4   GND
   5   TDI      6   GND
   7   TMS      8   GND
   9   TCK     10   GND
   11  VPP_E   12   GND
   13  A/W     14   GND
   15  User 0  16   GND
   17  Rdy/Bsy 18   GND
   19  User 1  20   Vcc
    1 +3.3 V    2 +3.3 V
    3 nTRST     4 GND
    5 TDI       6 GND
    7 TMS       8 GND
    9 TCK      10 GND
   11  --      12 GND
   13 TDO      14 GND
   15 nRST     16 GND
   17  --      18 GND
   19  --      20 GND 


external links