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參數(shù)資料
| 型號(hào)： | PIC12F506 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8/14-Pin, 8-Bit Flash Microcontroller |
| 中文描述： | 8/14-Pin，8位閃存微控制器 |
| 文件頁(yè)數(shù)： | 73/116頁(yè) |
| 文件大?。?/td> | 907K |
| 代理商： | PIC12F506 |
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2007 Microchip Technology Inc.
Preliminary
DS41268C-page 71
PIC12F510/16F506
11.0
INSTRUCTION SET SUMMARY
The PIC16 instruction set is highly orthogonal and is
comprised of three basic categories.
Byte-oriented
operations
Bit-oriented
operations
Literal and control
operations
Each PIC16 instruction is a 12-bit word divided into an
opcode
, which specifies the instruction type, and one
or more
operands
which further specify the operation
of the instruction. The formats for each of the catego-
ries is presented in Figure 11-1, while the various
opcode fields are summarized in Table 11-1.
For
byte-oriented
instructions, ‘f’ represents a file
register designator and ‘d’ represents a destination
designator. The file register designator specifies which
file register is to be used by the instruction.
The destination designator specifies where the result of
the operation is to be placed. If ‘d’ is ‘
0
’, the result is
placed in the W register. If ‘d’ is ‘
1
’, the result is placed
in the file register specified in the instruction.
For
bit-oriented
instructions, ‘b’ represents a bit field
designator which selects the number of the bits
affected by the operation, while ‘f’ represents the
number of the file in which the bit is located.
For
literal and control
operations, ‘k’ represents an
8 or 9-bit constant or literal value.
TABLE 11-1:
OPCODE FIELD
DESCRIPTIONS
All instructions are executed within a single instruction
cycle, unless a conditional test is true or the program
counter is changed as a result of an instruction. In this
case, the execution takes two instruction cycles. One
instruction cycle consists of four oscillator periods.
Thus, for an oscillator frequency of 4 MHz, the normal
instruction execution time is 1
μ
s. If a conditional test is
true or the program counter is changed as a result of an
instruction, the instruction execution time is 2
μ
s.
Figure 11-1 shows the three general formats that the
instructions can have. All examples in the figure use
the following format to represent a hexadecimal
number:
0xhhh
where ‘h’ signifies a hexadecimal digit.
FIGURE 11-1:
GENERAL FORMAT FOR
INSTRUCTIONS
Field
Description
f
Register file address (0x00 to 0x7F)
Working register (accumulator)
Bit address within an 8-bit file register
Literal field, constant data or label
Don’t care location (=
0
or
1
)
The assembler will generate code with x =
0
. It is the
recommended form of use for compatibility with all
Microchip software tools.
Destination select;
d =
0
(store result in W)
d =
1
(store result in file register ‘f’)
Default is d =
1
Label name
Top-of-Stack
Program Counter
Watchdog Timer counter
W
b
k
x
d
label
TOS
PC
WDT
TO
Time-out bit
PD
dest
Power-down bit
Destination, either the W register or the specified
register file location
Options
Contents
Assigned to
Register bit field
In the set of
User defined term (font is courier)
[ ]
( )
→
< >
∈
italics
Byte-oriented file register operations
11 6 5 4 0
OPCODE d f (FILE #)
d =
0
for destination W
d =
1
for destination f
f = 5-bit file register address
Bit-oriented file register operations
11 8 7 5 4 0
OPCODE b (BIT #) f (FILE #)
b = 3-bit bit address
f = 5-bit file register address
Literal and control operations
(except
GOTO
)
11 8 7 0
OPCODE k (literal)
k = 8-bit immediate value
Literal and control operations
–
GOTO
instruction
11 9 8 0
OPCODE k (literal)
k = 9-bit immediate value
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