PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 205
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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Manufacturer
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:
NS
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BTG
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
7/99 Microchip Technology Inc.
Before Instruction:
After Instruction:
Decode
PORTC
PORTC
Q1
=
=
register ’f’
Bit Toggle f
[ label ] BTG f,b,a
0
0
a
(f<b>)
None
Bit ’b’ in data memory location ’f’ is
inverted. 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
BTG
Read
0111
Q2
0111 0101 [0x75]
0110 0101 [0x65]
f
b < 7
[0,1]
255
PORTC,
f<b>
bbba
Process
Data
Q3
4, 0
ffff
register ’f’
Write
Q4
ffff
Preliminary
BOV
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 Overflow =
If Overflow
No
Q1
Q1
PC
PC
Read literal
Read literal
operation
Branch if Overflow
[ label ] BOV
-128
if overflow bit is ’1’
(PC) + 2 + 2n
None
If the Overflow 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’
=
=
=
PIC18CXX2
n
address (HERE)
1;
address (Jump)
0;
address (HERE+2)
127
0100
BOV
operation
Process
Process
Data
Data
No
Q3
Q3
DS39026B-page 205
n
PC
Jump
nnnn
Write to PC
operation
operation
No
No
Q4
Q4
nnnn
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