S3F80P5_UM_ REV1.00 ADDRESSING MODES
INDIRECT REGISTER ADDRESSING MODE (Continued)
dst
OPCODE ADDRESS
4-bit
Working
Register
Address Point to the
Woking Register
(1 of 8)
Sample Instruction:
OR R3, @R6
Program Memory
Register File
src 3 LSBs
Value used in
instruction OPERAND
Selected
RP points
to start of
woking register
block
RP0 or RP1
MSB Points to
RP0 or RP1
~ ~~ ~Figure 3-5. Indirect Working Register Addressing to Register File
3-5