Samsung S3C9228/P9228 LDCI/LDEI Load Memory and Increment, LDCI/LDEI dst,src Operation dst ¨ src

SAM88RI INSTRUCTION SET S3C9228/P9228

LDCI/LDEI — Load Memory and Increment

LDCI/LDEI dst,src

Operation: dst ¨ src

rr ¨ rr + 1

These instructions are used for user stacks or block transfers of data from program or data memory to the register file. The address of the memory location is specified by a working register pair. The contents of the source location are loaded into the destination location. The memory address is then incremented automatically. The contents of the source are unaffected.

LDCI refers to program memory and LDEI refers to external data memory. The assembler makes Irr' even for program memory and odd for data memory.

Flags: No flags are affected.

Format:

opc dst src

Bytes	Cycles	Opcode	Addr Mode
		(Hex)	dst	src
2	10	E3	r	Irr

Examples: Given: R6 = 10H, R7 = 33H, R8 = 12H, program memory locations 1033H = 0CDH and

1034H = 0C5H; external data memory locations 1033H = 0DDH and 1034H = 0D5H:

LDCI	R8,@RR6	;	0CDH (contents of program memory location 1033H) is
		; loaded into R8 and RR6 is incremented by one
		;	(RR6 ¨ RR6 + 1)R8 = 0CDH, R6 = 10H, R7 = 34H
LDEI	R8,@RR6	;	0DDH (contents of data memory location 1033H) is
		; loaded into R8 and RR6 is incremented by one
		;	(RR6 ¨ RR6 + 1) R8 = 0DDH, R6 = 10H, R7 = 34H

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