Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
401
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
Figure 21-6.
Command State Chart
21.4.3.1 Get Flash Descriptor Command
This command provides the system with information on the Flash organization. The system can take full
advantage of this information. For instance, a device could be replaced by one with more Flash capacity, and so
the software is able to adapt itself to the new configuration.
advantage of this information. For instance, a device could be replaced by one with more Flash capacity, and so
the software is able to adapt itself to the new configuration.
To get the embedded Flash descriptor, the application writes the GETD command in EEFC_FCR. The first word of
the descriptor can be read by the software application in EEFC_FRR as soon as the FRDY flag in EEFC_FSR
rises. The next reads of EEFC_FRR provide the following word of the descriptor. If extra read operations to
EEFC_FRR are done after the last word of the descriptor has been returned, then EEFC_FRR value is 0 until the
next valid command.
the descriptor can be read by the software application in EEFC_FRR as soon as the FRDY flag in EEFC_FSR
rises. The next reads of EEFC_FRR provide the following word of the descriptor. If extra read operations to
EEFC_FRR are done after the last word of the descriptor has been returned, then EEFC_FRR value is 0 until the
next valid command.
Check if FRDY flag Set
No
Yes
Read Status: MC_FSR
Write FCMD and PAGENB in Flash Command Register
Check if FLOCKE flag Set
Check if FRDY flag Set
No
Read Status: MC_FSR
Yes
Yes
Locking region violation
No
Check if FCMDE flag Set
Yes
No
Bad keyword violation
Command Successfull