ISPCON

ISPTRG

DFBA

ISPADR

ISPDAT

ISPCMD

ISPEN : ISP Enable\nISP function enable bit. Set this bit to enable ISP function.\n
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

BS : Boot Selection Set/clear this bit to select next booting from LDROM/APROM, respectively. This bit also functions as MCU booting status flag, which can be used to check where MCU booted from. This bit is initiated with the inversed value of CBS in Config0 after power-on reset It keeps the same value at other reset.
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CFGUEN : Enable Config-bits Update by ISP\n
bits : 4 - 4 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

LDUEN : LDROM Update Enable\n
bits : 5 - 5 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ISPFF : ISP Fail Flag\nThis bit is set by hardware when a triggered ISP meets any of the following conditions:\n(1) APROM writes to itself.\n(2) LDROM writes to itself.\n(3) CONFIG is erased/programmed when the MCU is running in APROM.\n(4) Destination address is illegal, such as over an available range.\nSoftware can write 1 to clear this bit.
bits : 6 - 6 (1 bit)
access : read-write

SWRST : Software Reset\nWriting 1 to this bit to start software reset.\nIt is cleared by hardware after reset is finished.
bits : 7 - 7 (1 bit)
access : read-write

PT : Flash Program Time\n
bits : 8 - 10 (3 bit)
access : read-write

ET : Flash Erase Time\n
bits : 12 - 14 (3 bit)
access : read-write

ISPGO : ISP Start Trigger Write 1 to start ISP operation 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\nThis register indicates data flash start address. It is a read only register.\nThe 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\nThe NuMicro Mini51TM series supports word program only. ISPADR[1:0] must be kept 00 for ISP operation.
bits : 0 - 31 (32 bit)
access : read-write

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

FOEN_FCEN_FCTRL : ISP Command\n
bits : 0 - 5 (6 bit)
access : read-write