PIC16F819 Microchip Technology Inc., PIC16F819 Datasheet - Page 108

• Manufacturer Part Number: PIC16F819
• Description: 18/20-pin Enhanced Flash Microcontrollers With Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

PIC16F818/819
BTFSS
Syntax:
Operands:
Operation:
Status Affected:
Description:
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Description:
CALL
Syntax:
Operands:
Operation:
Status Affected:
Description:
DS39598E-page 106
Bit Test f, Skip if Set
[ label ] BTFSS f,b
0
0
skip if (f<b>) = 1
None
If bit ‘b’ in register ‘f’ = 0, the next
instruction is executed.
If bit ‘b’ = 1, then the next
instruction is discarded and a NOP
is executed instead, making this a
2 T
Bit Test, Skip if Clear
[ label ] BTFSC f,b
0
0
skip if (f<b>) = 0
None
If bit ‘b’ in register ‘f’ = 1, the next
instruction is executed.
If bit ‘b’ in register ‘f’ = 0, the next
instruction is discarded and a NOP
is executed instead, making this a
2 T
Call Subroutine
[ label ] CALL k
0
(PC) + 1
k
(PCLATH<4:3>)
None
Call subroutine. First, return
address (PC + 1) is pushed onto
the stack. The eleven-bit
immediate address is loaded into
PC bits<10:0>. The upper bits of
the PC are loaded from PCLATH.
CALL is a two-cycle instruction.
CY
CY
f
b
f
b < 7
k
PC<10:0>,
instruction.
instruction.
127
127
7
2047
TOS,
PC<12:11>
CLRF
Syntax:
Operands:
Operation:
Status Affected:
Description:
CLRW
Syntax:
Operands:
Operation:
Status Affected:
Description:
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Description:
Clear W
[ label ] CLRW
None
00h
1
Z
W register is cleared. Zero bit (Z)
is set.
Clear Watchdog Timer
[ label ] CLRWDT
None
00h
0
1
1
TO, PD
CLRWDT instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT. Status bits
TO and PD are set.
Clear f
[ label ] CLRF
0
00h
1
Z
The contents of register ‘f’ are
cleared and the Z bit is set.
f
Z
WDT prescaler,
TO
PD
 2004 Microchip Technology Inc.
Z
127
(W)
WDT
(f)
f