ATmega128 programming a CPLD over JTAG

ATmega128 programming a CPLD over JTAG#94103

By Stevetronics - Sun Feb 21, 2010 8:34 pm

- Sun Feb 21, 2010 8:34 pm #94103

Hey all, I've got a project in the works that needs to program a CPLD (in this case an ATF1508ASVL in the 84PLCC package from atmel) and I was wondering if the JTAG interface on the ATmega128 would be useable for this, or if it is solely a programming interface. Any help would be great. Thanks!

"Oh, you have to plug it into the wall!" - Just before 120VAC hit his 'Mega168.

#94107

By leon_heller - Sun Feb 21, 2010 9:32 pm

- Sun Feb 21, 2010 9:32 pm #94107

The JTAG I/F is just for programming and debugging.

Leon Heller
G1HSM

#94116

By Polux rsv - Mon Feb 22, 2010 12:56 am

- Mon Feb 22, 2010 12:56 am #94116

If I remember correctly, JTAG is a kind of SPI: clock, data in, data out and some control signal. You could probably use the SPI and some IO lines.

Angelo

SparkFun Forums