Why do I get a different IDCODE for EP4CGX50 and EP4CGX30 devices in the F23 package? - Why do I get a different IDCODE for EP4CGX50 and EP4CGX30 devices in the F23 package? Description Issue 363791: Chapter 10, JTAG Boundary-scan Testing for Cyclone IV devices, version 1.1 The IDCODE information for EP4CGX50 and EP4CGX30 devices in the F23 packagehave been updated to: Device IDCODE (32 bits) (1) Version (4 Bits) Part Number (16 Bits) Manufacturer Identity (11 Bits) LSB (1 Bit) (2) EP4CGX30 (3) 0000 0010 1000 0010 0011 000 0110 1110 1 EP4CGX50 0000 0010 1000 0001 0011 000 0110 1110 1 Notes: (1) The MSB is on the left. (2) The IDCODE LSB is always 1. (3) The IDCODE is applicable for the F23 package only. Resolution This issue is fixed in the Quartus II software version 10.1SP1. Related Articles Cyclone® IV Device Handbook: Known Issues Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 10.1.1 novalue ['Cyclone® IV FPGAs', 'Cyclone® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']