ORG 0

1
?????????????????????????1?? ?????????
2
??????????

• ????????????

ORG 0 BSF STATUS,RP0 CLRF
TRISB BCF STATUS,RP0 CLRF
PORTB MOVLW 55H MOVWF PORTB
3
??????????

• ?????????????(???)??????????????????
• ??????,???? ex)C??, Java
• ??????????
• ???????????????????
• ?????????????????
• Ex) PIC?Pentium?????????
• PIC??35??????????(???4549???)

4
????????????

• C?????????????????????(????????Java??????)
• C??????????(?????)?
• ????????(?????,)????
• (?(???)??????)
• ??????????C?????????????????????
• ?????????????????????????????????
• gcc????-S?????

5
??????

• ?????????????
• ?????????0?1??????
• ???0?1?????????????????????

11000000000100 00000010001100 11000000010001 00011
100001100
6
???????????

• ??????????????????
• ?????????????????

??????? MOVLW 04H MOVWF 0CH MOVLW 11H ADDWF
0CH,W
??? 11000000000100 00000010001100 11000000010001 0
0011100001100
7
???

• ?????????????????????????????????
• ??????????????????????????

??????? MOVLW 04H MOVWF 0CH MOVLW 11H ADDWF 0CH,W
??? 11000000000100 00000010001100 11000000010001 0
0011100001100
?????
8
???

• ??????????????????????????????????????

ADDWF 0CH,W
?????
?????
9
??????????

• ????????????????????
• C??????????????
• C?????????????????????????????????????????????????
  ?????
• ????????(???????????)?????????????????
• ??????????????????????????

10
??????????

• ?????????OS???
• ????????????????????????
• ???????????????
• ?????????
• ?????????????

11
PIC???
12
PIC???
????? ????
????? ???
?? ????
???? ????
MUX
??????
RA0RA7
W ????
RB0RB7
13
PIC(PIC16F84)????

• PIC????????????????????????????(???78???)
• ?????????????????????
• ??????????????????????
• STATUS????
• ?????????????
• ?????? ??
• W????(Working Register)
• ????????????????????

14
????????
0??

• ?????????????????????????
• ?????????????????????????????
• ???13?????

1??
2??


0B??
0C??
0D??

4E??
4F??
15
????????
0??

• 0????0B?????Special Function Register(SFR)????????
  ??????
• PIC?????
• ?????
• ???????

1??
2??


0B??
0C??
0D??

4E??
4F??
16
????????
0??

• 0C????4F???????????????????????????????????????

1??
2??


0B??
0C??
0D??

4E??
4F??
17
PIC?????????

• W????????????????????(?????????)
• ??????????????(?????)???
• ALUArithmetic Logic Unit
• ???????????

???? ????
W????
ALU
18
PIC???? MOVE? -MOVLW

• ??????MOV??????????????(????????)
• MOVLW (MOVe Literal to W)
• ????(literal,??)?W?????????
• ?)MOVLW 04H
• 04H?W?????????(H?16?????)
• ??????????????????

19
PIC???? MOVE? -MOVF

• MOVF (MOVe File register)
• ??????????????????????????
• ?)MOVF 0CH,W
• 0CH??(?????????????)????W?????????
• ?)MOVF 0CH,F
• 0CH???0CH??????????(??????????)
• ????????????W?????????????????

20
PIC???? MOVE? -MOVWF

• MOVWF (MOVe W to File register)
• W?????????????????????
• ?)MOVWF 0CH
• W????????0CH???????
• W?????????????????????????????
• ???????
• ????????

21
PIC???? MOVE? ???

• MOVE???????????????????

??? ????
MOVLW
MOVF
???? ????
W????
MOVWF
22
PIC???? ????

• ALU???????????????
• ???????
• ????(AND, OR, NOT)
• ???

23
PIC???? ????? -ADDLW

• ADDLW (ADD Literal and W)
• W???????????????????W?????????
• ?) ADDLW 11H
• 11H?W???????????W???????

24
PIC???? ???? ADD?

• ADDWF (ADD W and File register)
• ??????????????????W?????????
• ?) ADDWF 0CH, W
• 0CH?????W???????????W???????
• ?) ADDWF 0CH, F
• 0CH?????W???????????0CH??(????????)???
• ??????ADD??????1???????????????????
• ???????????????????????

25
?)
11H
04H

• 04H?0CH????????????11H?????

???? ????
????? MOVLW 04H MOVWF 0CH MOVLW 11H ADDWF 0CH,W
04H
W????
04H
11H
15H
ALU
15H
04H
11H
26
??????

• ???45????ANDWF?????
• 1??ADD W with F ? AND W with F
• ?ADDWF REG0, F ? ANDWF REG0, F
• ??????WREG0 ? REG0 AND REG0
• ???47????IORLW?????
• 1??W????????????????? ? W?????????????