AR# 38255

MIG v3.5 Spartan-6 - Does not properly exit out of Self-Refresh Mode

Description

In simulation, "selfrefresh_mode" does not properly exit Self-Refresh Mode (selfrefresh_mode='0').

Solution

This issue only arises in simulation and is a result of an error in the mcb_soft_calibration.v/vhd RTL.

To correct the problem, make the following changes to mcb_soft_calibration.v/vhd:

Verilog:

Open mcb_soft_calibration.v and find line 614 which states:

else if (STATE == START_DYN_CAL && ~START_DYN_CAL_STATE_R1)

Replace it with:

else if (STATE == START_DYN_CAL && ~SELFREFRESH_MCB_MODE_R3)

VHDL:

Open mcb_soft_calibration.vhd and find line 719 which states:

elsif ((STATE = START_DYN_CAL) and (START_DYN_CAL_STATE_R1 = '0')) then

Replace it with:

elsif ((STATE = START_DYN_CAL) and (SELFREFRESH_MCB_MODE_R3 = '0')) then

This is scheduled to be fixed starting in 13.1.

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AR# 38255
Date	08/13/2014
Status	Active
Type	General Article
Devices	Spartan-6 LX Spartan-6 LXT
Tools	ISE Design Suite - 12.1 ISE Design Suite - 12.2 ISE Design Suite - 12.3
IP	MIG

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