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PIC18F23K22-E/ML データシート(PDF) 377 Page - Microchip Technology

部品番号 PIC18F23K22-E/ML
部品情報  28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology
PDF  496 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F23K22-E/ML データシート(HTML) 377 Page - Microchip Technology

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 2010 Microchip Technology Inc.
Preliminary
DS41412C-page 377
PIC18(L)F2X/4XK22
BNC
Branch if Not Carry
Syntax:
BNC
n
Operands:
-128
 n  127
Operation:
if CARRY bit is ‘0’
(PC) + 2 + 2n
 PC
Status Affected:
None
Encoding:
1110
0011
nnnn
nnnn
Description:
If the CARRY bit is ‘0’, then the program
will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words:
1
Cycles:
1(2)
Q Cycle Activity:
If Jump:
Q1
Q2
Q3
Q4
Decode
Read literal
‘n’
Process
Data
Write to PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1
Q2
Q3
Q4
Decode
Read literal
‘n’
Process
Data
No
operation
Example:
HERE
BNC
Jump
Before Instruction
PC
=
address (HERE)
After Instruction
If CARRY
=
0;
PC
=
address (Jump)
If CARRY
=
1;
PC
=
address (HERE + 2)
BNN
Branch if Not Negative
Syntax:
BNN
n
Operands:
-128
 n  127
Operation:
if NEGATIVE bit is ‘0’
(PC) + 2 + 2n
 PC
Status Affected:
None
Encoding:
1110
0111
nnnn
nnnn
Description:
If the NEGATIVE bit is ‘0’, then the
program will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
Words:
1
Cycles:
1(2)
Q Cycle Activity:
If Jump:
Q1
Q2
Q3
Q4
Decode
Read literal
‘n’
Process
Data
Write to PC
No
operation
No
operation
No
operation
No
operation
If No Jump:
Q1
Q2
Q3
Q4
Decode
Read literal
‘n’
Process
Data
No
operation
Example:
HERE
BNN
Jump
Before Instruction
PC
=
address (HERE)
After Instruction
If NEGATIVE =
0;
PC
=
address (Jump)
If NEGATIVE =
1;
PC
=
address (HERE + 2)



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