FMC_ISPCTL (ISPCTL)

FMC_ISPTRG (ISPTRG)

FMC_DFBA (DFBA)

FMC_FTCTL (FTCTL)

FMC_ISPADDR (ISPADDR)

FMC_ISPSTS (ISPSTS)

FMC_ISPDAT (ISPDAT)

FMC_ISPCMD (ISPCMD)

ISPEN : ISP Enable (Write Protect)\nISP function enable bit. Set this bit to enable ISP function.\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

BS : Boot Select (Write Protect)\nSet/clear this bit to select next booting from LDROM/APROM, respectively. This bit also functions as chip booting status flag, which can be used to check where chip booted from. This bit is initiated with the inversed value of CBS[1] (CONFIG0[7]) after any reset is happened except CPU reset (RSTS_CPU is 1) or system reset (RSTS_SYS) is happened\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

SPUEN : SPROM Update Enable (Write Protect)\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

APUEN : APROM Update Enable (Write Protect)\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 3 - 3 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CFGUEN : CONFIG Update Enable (Write Protect)\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 4 - 4 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

LDUEN : LDROM Update Enable (Write Protect)\nLDROM update enable bit.\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 5 - 5 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ISPFF : ISP Fail Flag (Write Protect)\nThis bit is set by hardware when a triggered ISP meets any of the following conditions:\nThis bit needs to be cleared by writing 1 to it.\n(1) APROM writes to itself if APUEN is set to 0.\n(2) LDROM writes to itself if LDUEN is set to 0.\n(3) CONFIG is erased/programmed if CFGUEN is set to 0.\n(4) SPROM is erased/programmed if SPUEN is set to 0\n(5) SPROM is programmed at SPROM secured mode.\n(6) Page Erase command at LOCK mode with ICE connection\n(7) Erase or Program command at brown-out detected\n(8) Destination address is illegal, such as over an available range.\n(9) Invalid ISP commands\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 6 - 6 (1 bit)
access : read-write

ISPGO : ISP Start Trigger (Write Protect)\nWrite 1 to start ISP operation and this bit will be cleared to 0 by hardware automatically when ISP operation is finished.\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DFBA : Data Flash Base Address\nThis register indicates Data Flash start address. It is a read only register.\nThe Data Flash is shared with APROM. the content of this register is loaded from CONFIG1\n
bits : 0 - 31 (32 bit)
access : read-only

FOM : Frequency Optimization Mode (Write Protect)\nThe NuMicro N121/125 series supports adjustable flash access timing to optimize the flash access cycles in different working frequency.\nNote 1: x denotes the bit is don't care.\nNote 2: These bits are write protected. Refer to the SYS_REGLCTL register.
bits : 4 - 6 (3 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ISPADDR : ISP Address\nThe NUC121/125 series is equipped with embedded flash. ISPADDR[1:0] must be kept 00 for ISP 32-bit operation. and ISPADDR[8:0] must be kept all 0 for Vector Page Re-map Command\nFor CRC32 Checksum Calculation command, this field is the flash starting address for checksum calculation, 512 bytes alignment is necessary for checksum calculation.
bits : 0 - 31 (32 bit)
access : read-write

ISPBUSY : ISP BUSY (Read Only)\n
bits : 0 - 0 (1 bit)
access : read-only

Enumeration:

End of enumeration elements list.

CBS : Boot Selection of CONFIG (Read Only)\nThis bit is initiated with the CBS (CONFIG0[7:6]) after any reset is happened except CPU reset (RSTS_CPU is 1) or system reset (RSTS_SYS) is happened.\n
bits : 1 - 2 (2 bit)
access : read-only

Enumeration:

End of enumeration elements list.

ISPFF : ISP Fail Flag (Write Protect)\nThis bit is the mirror of ISPFF (FMC_ISPCTL[6]), it needs to be cleared by writing 1 to FMC_ISPCTL[6] or FMC_ISPSTS[6]. This bit is set by hardware when a triggered ISP meets any of the following conditions:\n(1) APROM writes to itself if APUEN is set to 0.\n(2) LDROM writes to itself if LDUEN is set to 0.\n(3) CONFIG is erased/programmed if CFGUEN is set to 0.\n(4) SPROM is erased/programmed if SPUEN is set to 0\n(5) SPROM is programmed at SPROM secured mode.\n(6) Page Erase command at LOCK mode with ICE connection\n(7) Erase or Program command at brown-out detected\n(8) Destination address is illegal, such as over an available range.\n(9) Invalid ISP commands\nNote: This bit is write protected. Refer to the SYS_REGLCTL register.
bits : 6 - 6 (1 bit)
access : read-write

VECMAP : Vector Page Mapping Address (Read Only)\nAll access to 0x0000_0000~0x0000_01FF is remapped to the flash memory or SRAM address {VECMAP[20:0], 9'b0} ~ {VECMAP[20:0], 9'h1FF}, except SPROM.\nVECMAP [18:12] should be 0.\nNote: Vector mapping is page alignment (512 byte), and thus VECMAP starts from bit10.
bits : 9 - 29 (21 bit)
access : read-only

SCODE : Security Code Active Flag\nThis bit is set to 1 by hardware when detecting SPROM secured code is active at flash initialization, or software writes 1 to this bit to make secured code active; this bit is only cleared by SPROM page erase operation.\n
bits : 31 - 31 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ISPDAT : ISP Data\nWrite data to this register before ISP program operation.\nRead data from this register after ISP read operation.\n
bits : 0 - 31 (32 bit)
access : read-write

CMD : ISP CMD\nISP command table is shown below:\nThe other commands are invalid.
bits : 0 - 6 (7 bit)
access : read-write

Enumeration:

End of enumeration elements list.