Samsung S3C8275X User Manual
Page 42
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
ADDRESS
SPACES
2-9
PROGRAMMING TIP — Using the Page Pointer for RAM Clear (Page 0, Page 1)
LD
PP,#00H
;
Destination
← 0, Source ← 0
SRP
#0C0H
LD
R0,#0FFH
; Page 0 RAM clear starts
RAMCL0 CLR
@R0
DJNZ
R0,RAMCL0
CLR
@R0
; R0 = 00H
LD
PP,#10H
;
Destination
← 1, Source ← 0
LD
R0,#0FFH
; Page 1 RAM clear starts
RAMCL1 CLR
@R0
DJNZ
R0,RAMCL1
CLR
@R0
; R0 = 00H
NOTE: You should refer to page 6-39 and use DJNZ instruction properly when DJNZ instruction is used in your program.