Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
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8.1.4
Boot Strategies
The system always boots at address 0x0. To ensure maximum boot possibilities, the memory layout can be
changed using GPNVM bits.
A general-purpose NVM (GPNVM) bit is used to boot either on the ROM (default) or from the Flash.
The GPNVM bit can be cleared or set respectively through the commands “Clear GPNVM Bit” and “Set GPNVM
A general-purpose NVM (GPNVM) bit is used to boot either on the ROM (default) or from the Flash.
The GPNVM bit can be cleared or set respectively through the commands “Clear GPNVM Bit” and “Set GPNVM
Bit” of the EEFC User Interface.
Setting GPNVM1 selects the boot from the Flash. Clearing it selects the boot from the ROM. Asserting ERASE
Setting GPNVM1 selects the boot from the Flash. Clearing it selects the boot from the ROM. Asserting ERASE
clears the GPNVM1 and thus selects the boot from the ROM by default.
Setting the GPNVM2 selects Flash 1, clearing it selects the boot from Flash 0. Asserting ERASE clears GPNVM2
Setting the GPNVM2 selects Flash 1, clearing it selects the boot from Flash 0. Asserting ERASE clears GPNVM2
and thus selects the boot from Flash 0 by default. GPNVM2 is available only on SAM4SD32/SD16/SA16.