Altera MAX 10 FPGA User Manual
Page 46
Configura‐
tion Image
Mode
CFM0 (image 0)
Encryption Key
CFM1 (image 1)
Encryption Key
Key Stored
in the Device
Allow
Encrypted
POF Only
CONFIG_SEL
pin
Design Loaded
After Power-up
Dual
Key X
Not Encrypted
Key Y
Enabled
0
Configuration Fail
Dual
Key X
Not Encrypted
Key Y
Enabled
1
Configuration Fail
Dual
Key X
Key X
No key
Enabled
0
Configuration Fail
Dual
Key X
Key X
No key
Enabled
1
Configuration Fail
Dual
Key X
Key X
Key X
Enabled
0
image 0
Dual
Key X
Key X
Key X
Enabled
1
image 1
Dual
Key X
Key Y
Key X
Enabled
0
image 0
(9)
Dual
Key X
Key Y
Key X
Enabled
1
image 0
Dual
Key Y
Key Y
Key Y
Enabled
0
image 0
Dual
Key Y
Key Y
Key Y
Enabled
1
image 1
(9)
Dual
Key X
Key Y
Key Y
Enabled
0
image 1
Dual
Key X
Key Y
Key Y
Enabled
1
image 1
Table 3-4: Configuration Image Outcome Based on Encryption Settings and Encryption Key
Table shows the scenario when Auto-reconfigure from secondary image when initial image fails is disabled. If
this setting is disabled, device will always load image 0.
CFM0 (image 0)
Encryption Key
Key Stored in the
Device
Allow Encrypted POF
Only
Design Loaded After Power-up
Not Encrypted
No key
Disabled
image 0
Not Encrypted
Key X
Disabled
image 0
Not Encrypted
Key Y
Disabled
image 0
Not Encrypted
No key
Enabled
Configuration Fail
Not Encrypted
Key X
Enabled
Configuration Fail
Not Encrypted
Key Y
Enabled
Configuration Fail
Key X
No key
Disabled
Configuration Fail
Key X
Key X
Disabled
image 0
Key X
Key Y
Disabled
Configuration Fail
Key X
No key
Enabled
Configuration Fail
Key X
Key X
Enabled
image 0
Key X
Key Y
Enabled
Configuration Fail
Key Y
No key
Disabled
Configuration Fail
Key Y
Key X
Disabled
Configuration Fail
Key Y
Key Y
Disabled
image 0l
3-16
Encryption in Internal Configuration
UG-M10CONFIG
2015.05.04
Altera Corporation
MAX 10 FPGA Configuration Design Guidelines