PIC16F84A_07 Datasheet, PDF (40/88 Pages) Microchip Technology – 18-pin Enhanced FLASH/EEPROM 8-bit Microcontroller

PIC16F84A
BTFSC
Bit Test, Skip if Clear
Syntax:
Operands:
Operation:
Status Affected:
[label] BTFSC f,b
0 ≤ f ≤ 127
0≤b≤7
skip if (f<b>) = 0
None
Description:
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
2TCY instruction.
CALL
Syntax:
Operands:
Operation:
Status Affected:
Description:
Call Subroutine
[ label ] CALL k
0 ≤ k ≤ 2047
(PC)+ 1→ TOS,
k → PC<10:0>,
(PCLATH<4:3>) → PC<12:11>
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.
CLRF
Syntax:
Operands:
Operation:
Status Affected:
Description:
Clear f
[label] CLRF f
0 ≤ f ≤ 127
00h → (f)
1→Z
Z
The contents of register ’f’ are
cleared and the Z bit is set.
CLRW
Syntax:
Operands:
Operation:
Status Affected:
Description:
Clear W
[ label ] CLRW
None
00h → (W)
1→Z
Z
W register is cleared. Zero bit (Z)
is set.
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Description:
Clear Watchdog Timer
[ label ] CLRWDT
None
00h → WDT
0 → WDT prescaler,
1 → TO
1 → PD
TO, PD
CLRWDT instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT. Status bits
TO and PD are set.
COMF
Syntax:
Operands:
Operation:
Status Affected:
Description:
Complement f
[ label ] COMF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) → (destination)
Z
The contents of register ’f’ are
complemented. If ’d’ is 0, the
result is stored in W. If ’d’ is 1, the
result is stored back in register ’f’.
DECF
Syntax:
Operands:
Operation:
Status Affected:
Description:
Decrement f
[label] DECF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) - 1 → (destination)
Z
Decrement register ’f’. If ’d’ is 0,
the result is stored in the W regis-
ter. If ’d’ is 1, the result is stored
back in register ’f’.
DS35007B-page 38
© 2000 Microchip Technology Inc.