ECT 357

1
ECT 357

• Ch 3 Instruction Set

2

• Todays Quote
• Decisions can take you out of Gods will but
  never out of His reach.
• If we are faithless, he will remain faithful,
  for he cannot disown himself.
• 2 Timothy 213

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 H7f (alternative)
• Hex 20 (default)
• Binary B10011100
• Decimal D32
• Octal O777
• ASCII AC
• 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

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Other Instructions Continued

• retfie
• push
• pop
• clrwdt
• sleep
• reset
• nop

18
Table Instructions

• tblrd
• tblrd
• tblrd-
• tblrd
• tblwt x 4 same as tblrd