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