RM0440 Rev 4 185/2126
RM0440 Embedded Flash memory (FLASH) for category 4 devices
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Bits 31:17 Reserved, must be kept cleared
Bit 16 BOOT_LOCK used to force boot from user Flash area
0: Boot based on the pad/option bit configuration
1: Boot forced from Main Flash memory
Caution: If BOOT_LOCK is set in association with RDP Level 1, the debug
capabilities of the device are stopped and the reset value of the
DBG_SWEN bit of the FLASH_ACR register becomes zero. If the
DBG_SWEN bit is not set by the application code after reset, there is
no way to recover from this situation.
Bits 15:9 Reserved, must be kept cleared
Bit 8:0 SEC_SIZE1: sets the number of pages used in the Securable area.
Securable area starts at @ 0x0800 0000 and its size is SEC_SIZE1 * page size.
This field can be changed in level0 only.
Any attempt to modify in level1 silently fails, and does not change register value.
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