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AR# 31836

iMPACT 10.1, Spartan-3AN - Read Device Status Register is not avaialble

Description

I have a board with a Spartan-3AN FPGA, and I cannot read back the Status Register of this device anymore in 10.1.

How can I do this?

Solution

Since the Spartan-3AN FPGA has the embedded internal SPI Flash, reading back the Status Register on the previous iMPACT version actually reads back the FPGA Status Register plus the internal Flash register. To perform this last operation, the original design configured in the FPGA was lost as the JTAG to SPI interface design is loaded by iMPACT to read back the internal Flash register.

The Read Device Status Register operation has been disabled from the 10.1 GUI. The operation can still be carried out using the Batch mode command:

"readstatusregister -p x"
AR# 31836
Date Created 10/30/2008
Last Updated 12/15/2012
Status Active
Type General Article