Altera MAX 10 FPGA Manuale Utente Pagina 46

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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
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