Datasheet

 1999-2012 Microchip Technology Inc. DS40192D-page 43
PIC16C505
CALL Subroutine Call
Syntax: [
label ] CALL k
Operands: 0  k  255
Operation: (PC) + 1 Top of Stack;
k  PC<7:0>;
(STATUS<6:5>)  PC<10:9>;
0  PC<8>
Status Affected: None
Encoding:
1001 kkkk kkkk
Description: Subroutine call. First, return
address (PC+1) is pushed onto the
stack. The eight bit immediate
address is loaded into PC bits
<7:0>. The upper bits PC<10:9>
are loaded from STATUS<6:5>,
PC<8> is cleared. CALL is a two
cycle instruction.
Words: 1
Cycles: 2
Example:
HERE CALL THERE
Before Instruction
PC = address (HERE)
After Instruction
PC = address (THERE)
TOS = address (HERE + 1)
CLRF Clear f
Syntax: [
label ] CLRF f
Operands: 0  f  31
Operation: 00h  (f);
1  Z
Status Affected: Z
Encoding:
0000 011f ffff
Description: The contents of register 'f' are
cleared and the Z bit is set.
Words: 1
Cycles: 1
Example:
CLRF FLAG_REG
Before Instruction
FLAG_REG = 0x5A
After Instruction
FLAG_REG = 0x00
Z=1
CLRW Clear W
Syntax: [
label ] CLRW
Operands: None
Operation: 00h  (W);
1  Z
Status Affected: Z
Encoding:
0000 0100 0000
Description: The W register is cleared. Zero bit
(Z) is set.
Words: 1
Cycles: 1
Example:
CLRW
Before Instruction
W = 0x5A
After Instruction
W = 0x00
Z=1
CLRWDT Clear Watchdog Timer
Syntax: [
label ] CLRWDT
Operands: None
Operation: 00h  WDT;
0  WDT prescaler (if assigned);
1  TO;
1  PD
Status Affected: TO, PD
Encoding:
0000 0000 0100
Description: The CLRWDT instruction resets the
WDT. It also resets the prescaler, if
the prescaler is assigned to the
WDT and not Timer0. Status bits
TO and PD are set.
Words: 1
Cycles: 1
Example:
CLRWDT
Before Instruction
WDT counter = ?
After Instruction
WDT counter = 0x00
WDT prescale = 0
TO
=1
PD
=1