11.5.3 Boot Configuration

The Boot configuration page contains security information used by the Boot ROM. Information such as the Boot ROM CRC-32 value will be stored within this reserved space. Both BootCFG1 and BootCFG2 have the same mapping, the table below provides BootCFG mapping details.

Table 11-4. Bootcfg Mapping
Address	Register	Bit Field	Start Bit	Size (bits)	Value after chip erase	Description
0A002000	BLDRCFG	<See Below:>			0xC0000000	Bootloader configurations
		PFM_BCRP	0	1	0x0	Boot Config Page read protect bit
		PFM_BCWP	1	1	0x0	Boot Config Page write protect bit
		BROM_EN_BFMCHK	28	1	0x0	BFM CRC check enable
		BROM_EN_PLL	29	1	0x0	PLL config enable for BFM processings
		BROM_EN_DALUN	30	1	0x1	Allow BootRom to apply DALUN
		BROM_EN_ RWLOCKS	31	1	0x1	Allow BootRom to apply Read & Write locks
0A002004	BROM_BSEQ	<See Below:>			0xFFFE0001	Sequence # for BootCfg page
		SEQNUM	0	16	0x0001	Boot ROM Sequence Number
		SEQBAR	16	16	0xFFFE	1’s Complement of Seq. #
0A002008	BFM_CHK_ TABLEPTR		0	32	0xFFFFFFFF	BFM CRC table pointer
0A002020 - 0A00207F	Reserved
0A002080	KEYVAL_ TZ0_CE_ALL		0	128	0xFFFF…FF	Chip erase 3 (TZ0_ALL) access key
0A002090	CELOCK_ TZ0_CE_ALL		0	32	0xFFFFFFF	Chip erase lock for TZ0_ALL
0A002094	Reserved		0	96
0A0020A0	KEYVAL_ CRCCMD		0	128	0xFFFF…FF	CRC access key
0A0020B0	KEYCONFIG_ CRCCMD		0	128	0xFFFF…FF	Config for CRC access key
0A0020C0	KEYVAL_ HOSTDALELEV		0	128	0xFFFF…FF	Host-authenticated DAL elevation key
0A0020D0	KEYCONFIG_ HOSTDALELEV		0	128	0xFFFF…FF	Config for Host-authenticated DAL elevation key
0A0020E0	ROM_CTRLA		0	32	0xFFFFFFFF	ROM.CTRLA setting (if BROM_PLL_EN=1)
0A0020E4	FCR_CTRLA		0	32	0xFFFFFFFF	FCR.CTRLA setting (if BROM_PLL_EN=1)
0A0020E8	RPMU_ VREGCTRL		0	32	0xFFFFFFFF	RPMU.VREGCTRL setting (if BROM_PLL_EN=1)
0A0020EC	PLL0_CTRL		0	32	0xFFFFFFFF	PLL0.CTRL setting (if BROM_PLL_EN=1)
0A0020F0	PLL0_FBDIV		0	32	0xFFFFFFFF	PLL0.FBDIV setting (if BROM_PLL_EN=1)
0A0020F4	PLL0_REFDIV		0	32	0xFFFFFFFF	PLL0.REFDIV setting (if BROM_PLL_EN=1)
0A0020F8	PLL0_ POSTDIVA		0	32	0xFFFFFFFF	PLL0.POSTDIVA setting ( if BROM_PLL_EN=1)
0A0020FC	MCLK_ CLKDIV1		0	32	0xFFFFFFFF	MCLK.CLKDIV1 setting (if BROM_PLL_EN=1)
0A002100	GCLK_ GENCTRL0		0	32	0xFFFFFFFF	GCLK.GENCTRL0 setting (if BROM_PLL_EN=1)
0A002104	Reserved		0	96
0A002110	BROM_ BOOTCFGCRC		0	128	0xFFFFFFFF	CRC table for bootcfg page
0A002120	BROM_ PAGEEND		0	0	0xFFFFFFFF	Marker for end of verified data

Note:

PFM BootCfg read and write protects are disabled (BCWP = 0, BCRP = 0)
BROM_EN_BFMCHK = 0, BFM CRC check disabled
BROM_EN_PLL = 0, PLL config disabled
BROM_EN_DALUN is set (DAL setting will be applied at Boot ROM exit)
BROM_EN_RWLOCKS is set (Locks will be applied at Boot ROM exit)