Category:JTAG
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A [[w:JTAG|JTAG]] interface is a special four/five-pin interface added to a chip, designed so that multiple chips on a board can have their JTAG lines [[w:daisy-chain|daisy-chain]]ed together, and a [[w:test probe|test probe]] need only connect to a single "JTAG port" to have access to all chips on a [[w:circuit board|circuit board]]. The connector pins are | A [[w:JTAG|JTAG]] interface is a special four/five-pin interface added to a chip, designed so that multiple chips on a board can have their JTAG lines [[w:daisy-chain|daisy-chain]]ed together, and a [[w:test probe|test probe]] need only connect to a single "JTAG port" to have access to all chips on a [[w:circuit board|circuit board]]. The connector pins are | ||
#TDI (Test Data In) | #TDI (Test Data In) | ||
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http://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Jtag_chain.svg/300px-Jtag_chain.svg.png | http://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Jtag_chain.svg/300px-Jtag_chain.svg.png | ||
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| + | In addition to the above 5 signals, you also need to connect V<sub>DD</sub> and Ground signals from the board. | ||
| + | There are several interface cables that include all these pins and a few extra ones. | ||
| + | The 14-pin (2x7) interface is known as the '''TI standard''', | ||
| + | while the 20-pin (2x10) interface is known as the '''ARM standard'''. | ||
| + | The Linkstation HG uses a 16-pin (2x8) interface which is standard for Freescale/PPC boards. | ||
| + | |||
| + | See [[Add Jtag Port]] for a list of cable vendors. | ||
Latest revision as of 21:32, 8 September 2007
A JTAG interface is a special four/five-pin interface added to a chip, designed so that multiple chips on a board can have their JTAG lines daisy-chained together, and a test probe need only connect to a single "JTAG port" to have access to all chips on a circuit board. The connector pins are
- TDI (Test Data In)
- TDO (Test Data Out)
- TCK (Test Clock)
- TMS (Test Mode Select)
- TRST (Test ReSeT) optional.
In addition to the above 5 signals, you also need to connect VDD and Ground signals from the board.
There are several interface cables that include all these pins and a few extra ones.
The 14-pin (2x7) interface is known as the TI standard,
while the 20-pin (2x10) interface is known as the ARM standard.
The Linkstation HG uses a 16-pin (2x8) interface which is standard for Freescale/PPC boards.
See Add Jtag Port for a list of cable vendors.
Pages in category "JTAG"
The following 15 pages are in this category, out of 15 total.
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Media in category "JTAG"
This category contains only the following file.
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