Samsung S3F84B8 - LDCPI;LDEPI - Load Memory with Pre-Increment

S3F84B8_UM_REV 1.00 6 INSTRUCTION SET
6-56
6.3.43 LDCPI/LDEPI — LOAD MEMORY WITH PRE-INCREMENT
LDCPI/
LDEPI
dst,src
Operation: rr  rr + 1
dst  src
These instructions are used for block transfers of data from program or data memory to the
register file. The address of memory location is specified by a working register pair and is first
incremented. After this step, the contents of source location are loaded into the destination
location. The contents of the source remain unaffected.
LDCPI refers to program memory and LDEPI refers to external data memory. The assembler
makes ‘Irr’ an even number for program memory and an odd number for data memory.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
Addr Mode
dst src
opc src | dst 2 14 F3 Irr r
Examples: Given R0 = 7FH, R6 = 21H, and R7 = 0FFH:
LDCPI @RR6,R0 ; (RR6  RR6 + 1)
; 7FH (contents of R0) is loaded into program memory
; location 2200H (21FFH + 1H)
; R0 = 7FH, R6 = 22H, R7 = 00H
LDEPI @RR6,R0 ; (RR6  RR6 + 1)
; 7FH (contents of R0) is loaded into external data memory
; location 2200H (21FFH + 1H)
; R0 = 7FH, R6 = 22H, R7 = 00H