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Altera_Forum
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12 years ago

JTAG- USB byteblaster programming cable

Dear sir, We plan to connect all the devices in JTAG chain (please find the document attached) in a board. When programming cyclone-IV FPGA using JTAG interface using USB byteblaster, do we ...
Altera_Forum's avatar
Altera_Forum
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12 years ago

Hi,

if you want to have the FPGA to configure from the EPCS on power up you need to configure MSEL Pins to match this configuration scheme (fast / standard and Configuration voltage level). If you connect all MSEL to GND you can access the FPGA by JTAG, but on power up all GND gets the Cyclone IV to start in passive serial...

The AS Serial header to programm the EPCS directly can be "replaced" by JTAG and the "programm EPCS via JTAG" stuff, requiring IIRC configuration of the FPGA to take config by JTAG and shift this file to the EPCS...