PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 202
![no-image](/images/no-image-200.jpg)
PIC18F1220
Manufacturer Part Number
PIC18F1220
Description
18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F1220.pdf
(310 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18F1220-E/SO
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Company:
Part Number:
PIC18F1220-I/P
Manufacturer:
Microchip Technology
Quantity:
198
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PIC18F1220/1320
BCF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39605C-page 200
Q Cycle Activity:
Before Instruction
After Instruction
Decode
FLAG_REG
FLAG_REG
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
0xC7
0x47
FLAG_REG, 7
bbba
Process
Data
Q3
f,b[,a]
ffff
register ‘f’
Write
Q4
ffff
BN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
If Jump:
If No Jump:
Before Instruction
After Instruction
operation
Decode
Decode
PC
If Negative
If Negative
Q1
Q1
No
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
Q2
Q2
No
‘n’
‘n’
=
=
=
=
=
2004 Microchip Technology Inc.
n
address (HERE)
1;
address (Jump)
0;
address (HERE + 2)
127
0110
BN
operation
Process
Process
n
Data
Data
Q3
Q3
No
PC
Jump
nnnn
Write to PC
operation
operation
Q4
Q4
No
No
nnnn
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