PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 200
PIC18C242
Manufacturer Part Number
PIC18C242
Description
High-Performance Microcontrollers with 10-Bit A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18C242.pdf
(296 pages)
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Quantity
Price
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Part Number:
PIC18C242-I/SO
Manufacturer:
MICROCHIP
Quantity:
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Part Number:
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Manufacturer:
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PIC18CXX2
BCF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
DS39026B-page 200
Before Instruction
After Instruction
Decode
FLAG_REG = 0xC7
FLAG_REG = 0x47
Q1
register ’f’
Bit Clear f
[ label ] BCF
0
0
a
0
None
Bit 'b' in register 'f' is cleared. If ’a’
is 0, the Access Bank will be
selected, overriding the BSR value.
If ’a’ = 1, then the bank will be
selected as per the BSR value
(default).
1
1
BCF
Read
1001
Q2
f
b
[0,1]
f<b>
255
7
FLAG_REG,
bbba
Process
Data
Q3
f,b,a
ffff
7, 0
register ’f’
Write
Q4
ffff
Preliminary
BN
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 Negative
[ label ] BN
-128
if negative bit is ’1’
(PC) + 2 + 2n
None
If the Negative bit is ’1’, 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’
=
=
=
n
7/99 Microchip Technology Inc.
address (HERE)
1;
address (Jump)
0;
address (HERE+2)
127
0110
operation
BN
Process
Process
Data
Data
n
No
Q3
Q3
PC
Jump
nnnn
Write to PC
operation
operation
No
No
Q4
Q4
nnnn
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