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Altera_Forum
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8 years ago

Max 10 JTAG Voltage Question

Hello, I am designing a pcb around the 10M50SC (Max 10) 144 pin chip. I am confused about what voltage the JTAG lines should have. I've read that the pull up voltages for TMS and TDI ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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A single supply MAX10 device will be either supplied by 3.0 or 3.3V. It makes no sense to use a different supply than VCC_ONE for JTAG interface. Instead use effective clamp diodes if you worry about overshoot.

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Are you saying I should make the pull up voltage and Vcc voltage 3.3V on the JTAG?

There would be harm done if it was 3.3V instead of 2.5V right?