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PIC16C925T-S/CL 数据表(PDF) 129 Page - Microchip Technology

部件名 PIC16C925T-S/CL
功能描述  64/68-Pin CMOS Microcontrollers with LCD Driver
PDF  182 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

PIC16C925T-S/CL 数据表(HTML) 129 Page - Microchip Technology

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 2001 Microchip Technology Inc.
Preliminary
DS39544A-page 127
PIC16C925/926
RETURN
Return from Subroutine
Syntax:
[ label ]
RETURN
Operands:
None
Operation:
TOS
→ PC
Status Affected:
None
Encoding:
00
0000
0000
1000
Description:
Return from subroutine. The stack is
POPed and the top of the stack (TOS)
is loaded into the program counter.
This is a two-cycle instruction.
Words:
1
Cycles:
2
Q Cycle Activity:
Q1
Q2
Q3
Q4
1st Cycle
Decode
No
Operation
No
Operation
Pop from
the Stack
2nd Cycle
No
Operation
No
Operation
No
Operation
No
Operation
Example
RETURN
After Interrupt:
PC =
TOS
RLF
Rotate Left f through Carry
Syntax:
[ label ] RLF
f [,d]
Operands:
0
≤ f ≤ 127
d
∈ [0,1]
Operation:
See description below
Status Affected:
C
Encoding:
00
1101
dfff
ffff
Description:
The contents of register ’f’ are rotated
one bit to the left through the Carry
Flag. If ’d’ is 0, the result is placed in
the W register. If ’d’ is 1, the result is
stored back in register ’f’.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register
’f’
Process
data
Write to
destination
Example
RLF
REG1,0
Before Instruction:
REG1
=
1110 0110
C=
0
After Instruction:
REG1
=
1110 0110
W=
1100 1100
C=
1
Register f
C



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