Samsung 8-Bit CMOS Microcontroller, S3C9228/P9228 user manual Indexed Addressing Mode Concluded

S3C9228/P9228 ADDRESSING MODES

INDEXED ADDRESSING MODE (Concluded)

	Program Memory
	XLH (OFFSET)
4-Bit Working	XLL (OFFSET)
	dst	src
Register Address
	OPCODE

Sample Instructions:

		Register File
	NEXT 3 Bits	Register
		Pair
Point to Working		16-Bit
	Register Pair
		address
	(1 of 8)
		added to
LSB Selects		offset
	+
8-Bits	16-Bits
		Program Memory
		or
		Data Memory

		Value used in
16-Bits	OPERAND
		Instruction

LDC	R4, #1000H[RR2]	;	The values in the program address (RR2 +
#1000H)
			are loaded into register R4.
LDE	R4, #1000H[RR2]	;	Identical operation to LDC example, except that
			external program memory is accessed.

Figure 3-9. Indexed Addressing to Program or Data Memory with Long Offset

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