Samsung C8274X Computer Hardware User Manual


 
S3F8275X EMBEDDED FLASH MEMORY INTERFACE
16-11
READING
The read operation of programming starts by 'LDC' instruction.
The Reading Procedure in User Program Mode
1. Load a flash memory upper address into upper register of pair working register.
2. Load a flash memory lower address into lower register of pair working register.
3. Load receive data from flash memory location area on 'LDC' instruction by indirectly addressing mode.
PROGRAMMING TIP Reading
LD R2,#3H ; Load flash memory upper address
; To upper of pair working register
LD R3,#0 ; Load flash memory lower address
; To lower pair working register
LOOP: LDC R0,@RR2 ; Read data from flash memory location
; (Between 300H and 3FFH)
INC R3
CP R3,#0H
JP NZ,LOOP