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Zvi
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2 days ago

JTAG pins order for USB Blaster III - 1.27" header

USB Blaster III header has shrined in size relatively to the previous JTAG cables.

I see that in addition, pinout order has changed(according to USB Blaster III user guide).

So, if I want to place on a new board that I'm developing a matching connector(pitch=1.27") for USB Blaster III (without using the adapter board from the KIT), then I have to use new pinout order: 1-VCC_TRGET, 2-TMS, 3-GND, 4-TCK, 6-TDO, 7-nTRST, 8-TDI, 9-GND, 10-nPROCRST.

This order is different then was used with previous JTAG cables.

I couldn't find any reference schematic(also of EVAL KITs) that supports this new JTAG order.

I will appreciate if anyone from the forum can confirm my observation.

If it's possible that someone can answer me with an existing working reference design with 1.27" connector, I will appreciate it more.

 

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