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ECT 357

ECT 357. Ch 3 Instruction Set. Today’s Quote: Decisions can take you out of God’s will but never out of His reach. If we are faithless, he will remain faithful, for he cannot disown himself. 2 Timothy 2:13. Accumulator. A multipurpose register capable of: Bit Shifting

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ECT 357

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  1. ECT 357 Ch 3 Instruction Set

  2. Today’s Quote: Decisions can take you out of God’s will but never out of His reach. If we are faithless, he will remain faithful, for he cannot disown himself. 2 Timothy 2:13

  3. Accumulator A multipurpose register capable of: • Bit Shifting • Incrementing/Decrementing • Complementing • Adding/Subtracting • Swapping Nibbles • Boolean Operations

  4. Accumulator Operations The 128 Access Bank RAM locations plus all of the Special Function Registers act as accumulators. If two operands are needed, then one will be moved to the working register.

  5. F/W Operands If F or W are included as a possible operand for an instruction, they indicate that the final result will be placed in the original location (F) or the working register (W).

  6. Number Formats Hex 0x7f Hex H’7f’ (alternative) Hex 20 (default) Binary B’10011100’ Decimal D’32’ Octal O’777’ ASCII A’C’ ASCII ‘C’ (alternative)

  7. Letter Indications • L Literal • F Memory • W Working Register • B Bank Select Register • C Carry • NC No Carry • SC Skip Clear • SS Skip Set

  8. Instruction Types Move Bit Boolean Arithmetic Branch Conditional Skip Subroutine Other

  9. Move Instructions • movlw • movwf • movff • movf (flag changes) • lfsr • movlb • swapf

  10. Bit Instructions • bsf • bcf • btg • rrncf • rlncf • rrcf • rlcf

  11. Boolean Instructions • andlw • andwf • iorlw • iorwf • xorlw • xorwf

  12. Arithmetic Instructions • addlw • addwf • addwfc • sublw • subwf • subwfb • subfwb • mullw • mulwf

  13. Branch Instructions • bc • bnc • bz • bnz • bn • bnn • bov • bnov • goto • bra

  14. Conditional Skip Instructions • btfsc • btfss • cpfslt • cpfseq • cpfsgt • tstfsz • decfsz • dcfsnz • incfsz • infsnz

  15. Subroutine Instructions • call • rcall • retlw • return

  16. Other Instructions • clrf • setf • incf • decf • comf • negf • daw

  17. Other Instructions Continued • retfie • push • pop • clrwdt • sleep • reset • nop

  18. Table Instructions • tblrd* • tblrd*+ • tblrd*- • tblrd+* • tblwt x 4 same as tblrd

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