16F876 Microchip Technology, 16F876 Datasheet - Page 140

• Manufacturer Part Number: 16F876
• Description: 28/40-pin 8-Bit CMOS FLASH Microcontrollers
• Manufacturer: Microchip Technology

PIC16F87X
BTFSS
Syntax:
Operands:
Operation:
Status Affected:
Description:
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Description:
CALL
Syntax:
Operands:
Operation:
Status Affected:
Description:
DS30292B-page 140
Bit Test f, Skip if Set
[ label ] BTFSS f,b
0
0
skip if (f<b>) = 1
None
If bit ’b’ in register ’f’ is ’0’, the next
instruction is executed.
If bit ’b’ is ’1’, then the next instruc-
tion is discarded and a NOP is exe-
cuted instead making this a 2T
instruction.
Bit Test, Skip if Clear
[ label ] BTFSC f,b
0
0
skip if (f<b>) = 0
None
If bit ’b’ in register ’f’ is ’1’, the next
instruction is executed.
If bit ’b’, in register ’f’, is ’0’, the
next instruction is discarded, and
a NOP is executed instead, making
this a 2T
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 immedi-
ate address is loaded into PC bits
<10:0>. The upper bits of the PC
are loaded from PCLATH. CALL is
a two cycle instruction.
f
b < 7
f
b
k
PC<10:0>,
127
127
7
2047
CY
TOS,
instruction.
PC<12:11>
CY
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
Z
1999 Microchip Technology Inc.
127
(W)
WDT
(f)
f