RFPIC12C509AG Datasheet, PDF (68/104 Pages) Microchip Technology – 18/20-Pin 8-Bit CMOS Microcontroller with UHF ASK/FSK Transmitter

rfPIC12C509AG/509AF
SLEEP
Enter SLEEP Mode
Syntax:
[label] _SLEEP
Operands:
None
Operation:
00h → WDT;
0 → WDT prescaler;
1 → TO;
0 → PD
Status Affected: TO, PD, GPWUF
Encoding:
0000 0000 0011
Description:
Time-out status bit (TO) is set. The
power down status bit (PD) is cleared.
GPWUF is unaffected.
The WDT and its prescaler are
cleared.
The processor is put into SLEEP mode
with the oscillator stopped. See sec-
tion on SLEEP for more details.
Words:
1
Cycles:
1
Example:
SLEEP
SUBWF
Subtract W from f
Syntax:
[label] SUBWF f,d
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) – (W) → (dest)
Status Affected: C, DC, Z
Encoding:
0000 10df ffff
Description:
Subtract (2’s complement method) the
W register from register 'f'. If 'd' is 0 the
result is stored in the W register. If 'd' is
1 the result is stored back in register 'f'.
Words:
1
Cycles:
1
Example 1:
SUBWF REG1, 1
Before Instruction
REG1 = 3
W
=2
C
=?
After Instruction
REG1 = 1
W
=2
C
=1
; result is positive
Example 2:
Before Instruction
REG1 = 2
W
=2
C
=?
After Instruction
REG1 = 0
W
=2
C
=1
; result is zero
Example 3:
Before Instruction
REG1 = 1
W
=2
C
=?
After Instruction
REG1 = FF
W
=2
C
=0
; result is negative
DS70031A-page 66
Preliminary
© 2001 Microchip Technology Inc.