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Altera_Forum
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14 years ago

config fpgas with other fpga in AS mode

When I config FPGAs with other FPGA in AS mode,I met troubles below. When I select 3.3v LVTTL as IO STANDARD,the phenomenon is as below. FPGA-1 : the DCLK pin's voltage is about 3.3v FPGA-2 : ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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It's unclear what you are trying to achive.In the shown circuit, it's not possible to configure the slave FPGAs by the master FPGA directly, only writing the EPCS would be an option. But the circuit is apparently incomplete, DAT0 is missing.

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Yes,you are right.I just want to achive FPGAs to be configed by writing EPCS.And also,the DAT0 was not draw.In fact,the DAT0 exists.But,the master FPGA don't need it,so i did not draw it.