Samsung C8274X User Manual

dst

OPCODE

4-bit Working

Register Address

Sample Instructions:

LCD

R5,@RR6

;   Program memory access

LDE

R3,@RR14

;   External data memory access

LDE

@RR4, R8

;   External data memory access

Program Memory

Register File

src

Value used in

Instruction

OPERAND

Example Instruction

References either

Program Memory or

Data Memory

Program Memory

or

Data Memory

Next 2-bit Point

 to Working

Register Pair

(1 of 4)

LSB Selects

Register

Pair

16-Bit
address
points to
program
memory
or data
memory

RP0 or RP1

MSB Points to

RP0 or RP1

Selected
RP points
to start of
working
register
block