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Altera_Forum
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13 years ago

Configuration Data Confusion

I'm attempting to design a board for a Cyclone II device. I want to use an EPCS4 for the configuration data. I've read several Altera documents ("Configuring Cyclone II Devices", "Serial Config...
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Altera_Forum
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13 years ago

With the JTAG mode you can program the FPGA without using the EPCS chip. It's a volatile configuration. You need reconfigure the FPGA each time you power off the system. With the active serial you just program the EPCS device. After this, this chip configures the FPGA.

The JTAG signals ( TDI, TDO, TCK ) uses diffent pins that uses AS ( DCLK, DATA, ASDI, nCS ). This In all the PCB I draw I put both connectors.

I tied MSEL1,0 to GND with 2 10K pull-down resistors for standard speed Active Serial.