ISPCON

ISPTRG

DFBADR

ISPADR

ISPDAT

ISPCMD

ISPEN : ISP Enable
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

BS : Boot Select Modify this bit to select which ROM next boot is to occur. This bit also functions as MCU boot status flag, which can be used to check where MCU booted from. This bit is initialized after power-on reset with the inverse of CBS in Config0 It is not reset for any other reset event.
bits : 1 - 1 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

CFGUEN : CONFIG Update Enable When enabled, ISP functions can access the CONFIG address space and modify device configuration area.
bits : 4 - 4 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

LDUEN : LDROM Update Enable LDROM update enable bit.
bits : 5 - 5 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

ISPFF : ISP Fail Flag This bit is set by hardware when a triggered ISP meets any of the following conditions: (1) APROM writes to itself. (2) LDROM writes to itself. (3) Destination address is illegal, such as over an available range. Write 1 to clear.
bits : 6 - 6 (1 bit)
access : read-write

SWRST : Software Reset Writing 1 to this bit will initiate a software reset. It is cleared by hardware after reset.
bits : 7 - 7 (1 bit)
access : read-write

ISPGO : ISP Start Trigger Write 1 to start ISP operation. This will be cleared to 0 by hardware automatically when ISP operation is finished. After triggering an ISP function M0 instruction pipeline should be flushed with a ISB instruction to guarantee data integrity. This is a protected register, user must first follow the unlock sequence (see Protected Register Lock Key Register (REGLOCK)) to gain access.
bits : 0 - 0 (1 bit)
access : read-write

Enumeration:

End of enumeration elements list.

DFBA : Data Flash Base Address This register reports the data flash starting address. It is a read only register. Data flash size is defined by user configuration, register content is loaded from Config1 when chip is reset.
bits : 0 - 31 (32 bit)
access : read-only

ISPADR : ISP Address Register This is the memory address register that a subsequent ISP command will access. ISP operation are carried out on 32bit words only, consequently ISPARD[1:0] must be 00b for correct ISP operation.
bits : 0 - 31 (32 bit)
access : read-write

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

ISPCMD : ISP Command Operation Mode : ISPCMD Standby : 0x3X Read : 0x00 Program : 0x21 Page Erase : 0x22 Read CID : 0x0B Read DID : 0x0C
bits : 0 - 5 (6 bit)
access : read-write