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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Arria 10 Dev Kit - DDR4 calibration failed

Hi everyone, I can't get the DDR4 module that comes with the Arria 10 Dev Kit to work. When I configure the DDR4 design using BTS, I get "DDR4 calibration failed, test won't work" error message...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Check if the following setting is ON:

set_global_assignment -name RELEASE_CLEARS_BEFORE_TRI_STATES ON

If it is as shown above, then you need to change it to OFF and then try again

set_global_assignment -name RELEASE_CLEARS_BEFORE_TRI_STATES OFF
Suresh's avatar
Suresh
Icon for New Contributor rankNew Contributor
5 years ago

DDR4 calibration failed in A10 dev kit out of the box. Following is the calibration report from External Memory Interface Toolkit

+---------------------------------------+

; Calibration ; Fail ;
; Initial failing group ; 2 ;
; Initial failing calibration stage ; Write Per-bit Deskew ;

+---------------------------------------+
; Calibration Status Per Group ;
+-------+--------+----------------------+
; Group ; Status ; Error Stage ;
+-------+--------+----------------------+
; 0 ; Pass ; N/A ;
; 1 ; Pass ; N/A ;
; 2 ; Fail ; Write Per-bit Deskew ;
; 3 ; Fail ; Write Per-bit Deskew ;
; 4 ; Fail ; Write Per-bit Deskew ;
; 5 ; Fail ; Write Per-bit Deskew ;
; 6 ; Fail ; Write Per-bit Deskew ;
; 7 ; Fail ; Write Per-bit Deskew ;
; 8 ; Fail ; Write Per-bit Deskew ;
+-------+--------+----------------------+

Calibration passed for group 0 and 1 but failed for rest of the groups even after assigning RELEASE_CLEARS_BEFORE_TRI_STATES OFF