Samsung SAM88RCRI S3C9442 Manual page 26

ADDRESSING MODES
INDEXED ADDRESSING MODE (Continued)
4-Bit Working
Register Address
Sample Instructions:
LDC
LDE
Figure 3-8. Indexed Addressing to Program or Data Memory with Short Offset
3-8
Program Memory
XS (OFFSET)
dst src
OPCODE
LSB Selects
8-Bit
R4, #04H[RR2]
R4,#04H[RR2]
S3C9442/C9444/F9444/C9452/C9454/F9454
Register File
NEXT 3 Bits
Point to working
register pair
(1 of 8)
+
16-Bit
Program Memory
Data memory
16-Bit
; The values in the program address (RR2 + #04H)
are loaded into register R4.
; Identical operation to LDC example, except that
external program memory is accessed.
Register
Pair
16-Bit
address
added to
offset
or
Value used in
OPERAND
instruction