S3C9454B View Datasheet(PDF) - Samsung
Part Name
Description
MFG CO.
'S3C9454B' PDF : 199 Pages View PDF
ADDRESSING MODES
INDIRECT REGISTER ADDRESSING MODE (Concluded)
S3C9454B/F9454B
Register File
CFH
4-Bit Working
Register Address
Example instruction
references either
program memory or
data memory
.
.
.
Program Memory
.
dst
src
OPCODE
Next 3 Bits Point
to working
register pair
(1 of 8)
LSB Selects
Value used in
instruction
Register
Pair
Program Memory
or
Data Memory
C0H
16-Bit
address
points to
program
memory
or data
memory
OPERAND
Sample Instructions:
LCD
LDE
LDE
R5,@RR6
R3,@RR14
@RR4, R8
; Program memory access
; External data memory access
; External data memory access
Figure 3-6. Indirect Working Register Addressing to Program or Data Memory
3-6
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