JTAG supply voltage - error in data sheets?
Posted: Wed Jan 03, 2018 3:11 pm
Hi all,
I've just been checking the voltages on the xcore-200 explorerkit JTAG pins with nothing connected. The TDI and TMS inputs are pulled up to about 2.5V, but the XE216 data sheet says they should be pulled to VDDIOL, which is 3V3 in the explorer kit.
However VDDIOT is 2V5, so I'm wondering if the data sheet is in error.
Do you have any other ideas that might explain the discrepancy? I was measuring with a high impedance instrument, so it's not that.
Thanks.
I've just been checking the voltages on the xcore-200 explorerkit JTAG pins with nothing connected. The TDI and TMS inputs are pulled up to about 2.5V, but the XE216 data sheet says they should be pulled to VDDIOL, which is 3V3 in the explorer kit.
However VDDIOT is 2V5, so I'm wondering if the data sheet is in error.
Do you have any other ideas that might explain the discrepancy? I was measuring with a high impedance instrument, so it's not that.
Thanks.