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CF745 数据表(PDF) 52 Page - Microchip Technology

部件名 CF745
功能描述  EPROM/ROM-Based 8-Bit CMOS Microcontroller Series
PDF  217 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

CF745 数据表(HTML) 52 Page - Microchip Technology

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PIC16C5X
DS30453B-page 52
Preliminary
© 1998 Microchip Technology Inc.
SLEEP
Enter SLEEP Mode
Syntax:
[
label]
SLEEP
Operands:
None
Operation:
00h
→ WDT;
0
→ WDT prescaler;
1
→ TO;
0
→ PD
Status Affected:
TO, PD
Encoding:
0000
0000
0011
Description:
Time-out status bit (TO) is set. The
power down status bit (PD) is cleared.
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



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