Samsung S3F80P5X User Manual page 180

INSTRUCTION SET
LDW
— Load Word
LDW dst,src
dst ← src
Operation:
The contents of the source (a word) are loaded into the destination. The contents of the source
are unaffected.
Flags: No flags are affected.
Format:
opc
opc
Examples: Given: R4 = 06H, R5 = 1CH, R6 = 05H, R7 = 02H, register 00H = 1AH,
register 01H = 02H, register 02H = 03H, and register 03H = 0FH:
LDW
LDW
LDW
LDW
LDW
LDW
In the second example, please note that the statement "LDW 00H,02H" loads the contents of the
source word 02H, 03H into the destination word 00H, 01H. This leaves the value 03H in general
register 00H and the value 0FH in register 01H.
The other examples show how to use the LDW instruction with various addressing modes and
formats.
6-58
src dst
dst src
→
RR6,RR4 R6 = 06H, R7 = 1CH, R4 = 06H, R5 = 1CH
→
00H,02H Register 00H = 03H, register 01H = 0FH,
register 02H = 03H, register 03H = 0FH
→
RR2,@R7 R2 = 03H, R3 = 0FH,
04H,@01H →
Register 04H = 03H, register 05H = 0FH
RR6,#1234H →
R6 = 12H, R7 = 34H
02H,#0FEDH →
Register 02H = 0FH, register 03H = 0EDH
Bytes Cycles Opcode
3 8
8
4 8
S3F80P5_UM_ REV1.00
Addr Mode
(Hex) dst src
C4 RR RR
C5 RR IR
C6 RR IML