FMC_ISPCTL (ISPCTL)

FMC_ISPTRG (ISPTRG)

FMC_DFBA (DFBA)

FMC_ISPADDR (ISPADDR)

FMC_ISPSTS (ISPSTS)

FMC_CRCSEED (CRCSEED)

FMC_CRCCV (CRCCV)

FMC_ISPDAT (ISPDAT)

FMC_ISPCMD (ISPCMD)

ISPEN : ISP Enable Control (Write Protect) Set this bit to enable ISP function.
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

BS : Boot Select (Write Protect) Set/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 in CONFIG0 after any reset is happened except CPU reset (CPURF is 1) or system reset (SYSRF) is happened.
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

SPUEN : SPROM Update Enable Control (Write Protect)
bits : 2 - 2 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

APUEN : APROM Update Enable Control (Write Protect)
bits : 3 - 3 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CFGUEN : CONFIG Update Enable Control (Write Protect) Writing this bit to 1 enables software to update CONFIG value by ISP register control procedure regardless of program code is running in APROM or LDROM.
bits : 4 - 4 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

LDUEN : LDROM Update Enable Control (Write Protect)
bits : 5 - 5 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

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

ISPGO : ISP Start Trigger (Write Protect) Write 1 to start ISP operation and this bit will be cleared to 0 by hardware automatically when ISP operation is finished.
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DFBA : Data Flash Base Address This register indicates Data Flash start address. It is a read only register. The Data Flash start address is defined by user. Since on chip flash erase unit is 512 bytes, it is mandatory to keep bit 8-0 as 0.
bits : 0 - 31 (32 bit)
access : read-only

ISPADR : ISP Address The NM1240 series supports word program only. ISPADR[1:0] must be kept 00 for ISP operation.
bits : 0 - 31 (32 bit)
access : read-write

ISPBUSY : ISP Start Trigger (Read Only) Write 1 to start ISP operation and this bit will be cleared to 0 by hardware automatically when ISP operation is finished. Note: This bit is the same with FMC_ISPTRG bit 0.
bits : 0 - 0 (1 bit)
access : read-only

Enumeration:

End of enumeration elements list.

CBS : Config Boot Selection (Read Only) This is a mirror of CBS in CONFIG0.
bits : 1 - 2 (2 bit)
access : read-only

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

VECMAP : Vector Page Mapping Address (Read Only) The current flash address space 0x0000_0000~0x0000_01FF is mapping to address {VECMAP[11:0], 9'h000} ~ {VECMAP[11:0], 9'h1FF}.
bits : 9 - 20 (12 bit)
access : read-only

SCODE : Security Code Active Flag This bit field set by hardware when detecting SPROM secured code is active at flash initiation, or software writes 1 to this bit to make secured code active this bit is clear by SPROM page erase operation.
bits : 29 - 31 (3 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CRCSEED : CRC Seed Data This register was provided to be the initial value for CRC operation. Write data to this register before ISP CRC operation. Read data from this register after ISP CRC read operation.
bits : 0 - 31 (32 bit)
access : read-write

CRCCV : CRC Current Value This register provided current value of CRC during calculation.
bits : 0 - 31 (32 bit)
access : read-only

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

CMD : ISP Command ISP commands are shown below:
bits : 0 - 5 (6 bit)
access : read-write

Enumeration:

End of enumeration elements list.