Dangerous Prototypes Open Source Hardware

1.2V Support (?)

February 23, 2013, 01:43:51 am

I have the need to hook up to JTAG pins running at 1.2V.
The blurb for the bus blaster v2 suggests it will operate at 1.2V
But ....

The datasheet for the XC2C32A says that it operates at LVCOMS15 and you have to setup Schmitt trigger inputs.
ie - 1.5V with the appropriate programming of the CPLD IO block.

So what's the deal?
Has someone validated that you can run it with 1.2V levels and have things read/write properly?

Thanks for any info you might have.

Jason H.

Re: 1.2V Support (?)

Reply #1 – February 23, 2013, 07:14:05 am

We've seen no problems at 1.2volts, though it is out of spec. As long as temperature, current, and speed aren't too extreme it should work fine. If you need guaranteed performance you should probably look for something else or an adapter.

Thanks for the heads up on the docs mentioning 1.2volts, that should be fixed. I'm sorry about the error.

Re: 1.2V Support (?)

Reply #2 – February 23, 2013, 03:25:28 pm

Thanks for the info. I think I'll give it a shot and see.

Jason H.