Nuvoton NuMicro MS51 32K Series, Technical Reference Manual

Page: 263 / 491

MS51
Nov. 28, 2019 Page 263 of 491 Rev 1.00
MS51
32K
SE
RIES
TE
CHNICAL RE
F
EREN
CE MA
N
UAL
MOV TA,#55h
ORL IAPUEN,#00000100b ;CFUEN = 1, enable CONFIG update
RET
Disable_CONFIG_Update:
MOV
TA,#0Aah
MOV TA,#55h
ANL IAPUEN,#11111011b ;CFUEN = 0, disable CONFIG update
RET
Trigger_IAP:
MOV
TA,#0Aah ;IAPTRG is TA protected
MOV TA,#55h
ORL IAPTRG,#00000001b ;write ‘1’ to IAPGO to trigger IAP
process
RET
;********************************************************************
;
IAP APROM Function
;********************************************************************
Erase_AP:
MOV
IAPCN,#PAGE_ERASE_AP
MOV IAPFD,#0FFh
MOV R0,#00h
Erase_AP_Loop:
MOV
IAPAH,R0
MOV IAPAL,#00h
CALL Trigger_IAP
MOV
IAPAL,#80h
CALL Trigger_IAP
INC
R0
CJNE R0,#44h,Erase_AP_Loop
RET
Program_AP:
MOV
IAPCN,#BYTE_PROGRAM_AP
MOV IAPAH,#00h
MOV IAPAL,#00h
MOV DPTR,#AP_code
Program_AP_Loop:
CLR
A
MOVC A,@A+DPTR
MOV
IAPFD,A
CALL Trigger_IAP
INC
DPTR
INC IAPAL
MOV A,IAPAL
CJNE A,#14,Program_AP_Loop
RET
Program_AP_Verify:
MOV
IAPCN,#BYTE_READ_AP