JTAG (named after the Joint Test Action Group which codified it) is an industry standard for verifying designs and testing printed circuit boards after manufacture.
JTAG implements standards for on-chip instrumentation in electronic design automation (EDA) as a complementary tool to digital simulation. It specifies the use of a dedicated debug port implementing a serial communications interface for low-overhead access without requiring direct external access to the system address and data buses. The interface connects to an on-chip Test Access Port (TAP) that implements a stateful protocol to access a set of test registers that present chip logic levels and device capabilities of various parts.
The Joint Test Action Group formed in 1985 to develop a method of verifying designs and testing printed circuit boards after manufacture. In 1990 the Institute of Electrical and Electronics Engineers codified the results of the effort in IEEE Standard 1149.1-1990, entitled Standard Test Access Port and Boundary-Scan Architecture.
The JTAG standards have been extended by many semiconductor chip manufacturers with specialized variants to provide vendor-specific features.

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  1. C

    Tutorial ESP32 JTAG Debug November 2022

    ESP32 JTAG Debug November 2022 Size: 1.47GB Learning JTAG Debug Skill by using OpenOCD. GDB, JTAG, OpenOCD basic knowledge Setup GDB JTAG Debug for ESP32 Use GDB to debug ESP32 software JTAG GDB debug skills. This course focus on how to use GDB to implement the JTAG debug for ESP32 firmware...
  2. K

    Help XBOX 360 JTAG

    ano po mga kelangan para makapag jtag ng xbox 360?
  3. D

    Closed Boss san pwede mag pa jtag ng samsung j7 core rosario cavite area ko

    san po pwede mag pa jtag ng samsung j7 core rosario cavite area ko
  4. Z

    Closed Saan pwede magpagawa sa greenhills ng deadboot na cp?

    Saan pwede magpagawa sa Greenhills ng Deadboot na cp? At magkano ang price. Tia.
  5. L

    Closed Motherboard j2prime

    Saan po nakakabili ng board ng j2prime? Na deadboot kasi ang j2prime ko Or kung may tech. Dito pa mention naman po kung magaling sa jtag. Pampanga at tarlac area po ako
  6. Z

    Closed Jtag

    Paps saan kayo may alam na nagjjtag? Deadboot kasi cp ko. Mga magkano rin pajtag?
  7. L

    Closed Sino po marunong sa jtag method?

    Hello goodeve. Sino dito marunong mag JTAG method? Nasira kasi Phone ko j2prime na dead on the spot (deadboot) Pa mention nalang po kung may kakilala kang Technicians. Handa akong mag bayad :)
  8. G

    Closed Sino po nakakaalam ng jtag sa cellphone?

    guys alam nyo ba kung pano yung jtag sa cellphone? yung sakin kasi vibrate nalang talagang walang logo. sabi jtag daw kailangan. ano po ba yung jtag? may papalitan po bang pyesa dun? or parang reprogram po sya? kung magpaparepair po ba ko sa service center magkano po kaya aabutin?. thanks po
  9. J

    Closed Any idea about jtag

    Hello mga ka phc. Any idea magkano mag pa jtag ng.phone .. star mobile diamond 3 ang.unit salamat po in advance
  10. S

    Closed May nagjjtag ng zephyr xbox 360 dito or mayalam

    Saan Po pede magpajtag ng zephyr xbox 360 SA QC Yung mura mga di aabot ng 3k or 2k Di Po kasi nagagamit ehh. Thanks SA mga sasagot :)
  11. S

    Closed Looking for: marunong mag jtag ng lg g3

    Mga boss, sino po ba dito marunong mag JTAG ng LG G3 sabi kasi ng technician na kilala ko eh kelangan na daw JTAG kasi di na bumubukas. wala daw sya gamit pang JTAG .. ask ko na din kung magkano magpa JTAG
  12. K

    Closed dead boot samsung j7

    hello po mga ka phc newbie lng po ako pagdating sa firmwire and other software related issues ng phone. baka po may makatulong sa secondhand samsung j7 ko nabili ko lang po siya sa online buy and sell 2 days after kong mabili bigla nalang siyang namatay. di naman po siya nabagsak or nabasa sabi...
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    Help Kaya ba ng debug sa jtag yung 22m 2012 na na-169 ip?

    balak ko sana gawin yung sa tutorial to debug bm622m 2012 baka marepair ko. log-in using putty.exe tapos parang nasa linux nako then reset config. i will use CA-42 cable ng old nokia phones to connect to jtag. may pics naman dun sa tutorial kung pano i-connect eh.

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