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參數(shù)資料
| 型號： | 35007B |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 18-pin Enhanced FLASH/EEPROM 8-bit Microcontroller |
| 中文描述： | 18針/ EEPROM的8位微控制器的閃存 |
| 文件頁數(shù)： | 37/88頁 |
| 文件大?。?/td> | 1495K |
| 代理商： | 35007B |
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2000 Microchip Technology Inc.
DS35007B-page 35
PIC16F84A
7.0
INSTRUCTION SET SUMMARY
Each PIC16CXX instruction is a 14-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 PIC16CXX instruction
set summary in Table 7-2 lists
byte-oriented
,
bit-ori-
ented
, and
literal and control
operations. Table 7-1
shows the opcode field descriptions.
For
byte-oriented
instructions, ’f’ represents a file reg-
ister designator and ’d’ represents a destination desig-
nator. 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 zero, the result is
placed in the W register. If ’d’ is one, 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 bit affected
by the operation, while ’f’ represents the address of the
file in which the bit is located.
For
literal and control
operations, ’k’ represents an
eight or eleven bit constant or literal value.
TABLE 7-1:
OPCODE FIELD
DESCRIPTIONS
The instruction set is highly orthogonal and is grouped
into three basic categories:
Byte-oriented
operations
Bit-oriented
operations
Literal and control
operations
All instructions are executed within one single instruc-
tion cycle, unless a conditional test is true or the pro-
gram counter is changed as a result of an instruction.
In this case, the execution takes two instruction cycles
with the second cycle executed as a
NOP
. One instruc-
tion 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 instruc-
tion, the instruction execution time is 2
μ
s.
Table 7-2 lists the instructions recognized by the
MPASM Assembler.
Figure 7-1 shows the general formats that the instruc-
tions can have.
All examples use the following format to represent a
hexadecimal number:
0xhh
where h signifies a hexadecimal digit.
FIGURE 7-1:
GENERAL FORMAT FOR
INSTRUCTIONS
A description of each instruction is available in the
PICmicro Mid-Range Reference Manual (DS33023).
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 compat-
ibility 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
Program Counter
Time-out bit
Power-down bit
W
b
k
x
d
PC
TO
PD
Note:
To maintain upward compatibility with
future PIC16CXX products, do not use the
OPTION
and
TRIS
instructions.
Byte-oriented file register operations
13 8 7 6 0
OPCODE d f (FILE #)
d = 0 for destination W
d = 1 for destination f
f = 7-bit file register address
Bit-oriented file register operations
13 10 9 7 6 0
OPCODE b (BIT #) f (FILE #)
b = 3-bit bit address
f = 7-bit file register address
Literal and control operations
13 8 7 0
OPCODE k (literal)
k = 8-bit immediate value
13 11 10 0
OPCODE k (literal)
k = 11-bit immediate value
General
CALL
and
GOTO
instructions only
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