PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 201
PIC18C242
Manufacturer Part Number
PIC18C242
Description
High-Performance Microcontrollers with 10-Bit A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18C242.pdf
(296 pages)
Available stocks
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Quantity
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Company:
Part Number:
PIC18C242-I/SO
Manufacturer:
MICROCHIP
Quantity:
2 000
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Part Number:
PIC18C242/JW
Manufacturer:
NS
Quantity:
10
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BNC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If Jump:
Example:
If No Jump:
7/99 Microchip Technology Inc.
Before Instruction
After Instruction
operation
Decode
Decode
No
PC
If Carry
If Carry
Q1
Q1
PC
PC
Read literal
Read literal
operation
Branch if Not Carry
[ label ] BNC
-128
if carry bit is ’0’
(PC) + 2 + 2n
None
If the Carry bit is ’0’, then the pro-
gram 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.
1
1(2)
HERE
1110
No
Q2
Q2
’n’
’n’
=
=
=
=
n
address (HERE)
0;
address (Jump)
1;
address (HERE+2)
127
0011
BNC
operation
Process
Process
Data
Data
No
Q3
Q3
n
PC
Jump
nnnn
Write to PC
operation
operation
No
No
Q4
Q4
nnnn
Preliminary
BNN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If Jump:
Example:
If No Jump:
Before Instruction
After Instruction
operation
Decode
Decode
PC
If Negative
If Negative =
No
Q1
Q1
PC
PC
Read literal
Read literal
operation
Branch if Not Negative
[ label ] BNN
-128
if negative bit is ’0’
(PC) + 2 + 2n
None
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.
1
1(2)
HERE
1110
No
Q2
Q2
’n’
’n’
=
=
=
PIC18CXX2
n
address (HERE)
0;
address (Jump)
1;
address (HERE+2)
127
0111
BNN
operation
Process
Process
Data
Data
No
Q3
Q3
DS39026B-page 201
n
PC
Jump
nnnn
Write to PC
operation
operation
No
No
Q4
Q4
nnnn
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