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Registered: ‎04-02-2012

Regarding JTAG pins voltage levels on XC95144XL CPLD

HI,

What is voltage levels supported on the JTAG pins of XC95144XL CPLD?Because, the attached datasheet says that I/O's are 5V tolerant(means JTAG signals can also be 5V)

Thanks and Regards,

Prashant.

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Professor
Professor
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Registered: ‎08-14-2007

Re: Regarding JTAG pins voltage levels on XC95144XL CPLD

The recommended input levels are in the data sheet:

 

 

These values pretty well describe "TTL" level signaling.  Output drive will depend on the

supply voltage, but should be capable of driving TTL levels regardless of the voltage.

For use with a standard programming cable, you should make the cable reference

voltage the same as the output supply voltage, most likely 3.3V.

 

-- Gabor

-- Gabor
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