PIC16C782 Microchip Technology Inc., PIC16C782 Datasheet - Page 135
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PIC16C782
Manufacturer Part Number
PIC16C782
Description
8-bit Cmos Microcontrollers With A/d, D/a, Opamp, Comparators And Psmc
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C782.pdf
(186 pages)
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15.0
Each PIC16CXXX 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 PIC16CXXX instruc-
tion set summary in Table 15-2 lists byte-oriented, bit-
oriented, and literal and control operations. Table 15-
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 number 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 15-1:
The instruction set is highly orthogonal and is grouped
into three basic categories:
• Byte-oriented operations
• Bit-oriented operations
• Literal and control operations
f
W
b
k
x
d
PC
TO
PD
Field
2001 Microchip Technology Inc.
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 compati-
bility 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
INSTRUCTION SET SUMMARY
OPCODE FIELD
DESCRIPTIONS
Description
Preliminary
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 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 s.
Table 15-2 lists the instructions recognized by the
MPASM
Figure 15-1 shows the general formats that the instruc-
tions can have.
All examples use the following format to represent a
hexadecimal number:
where h signifies a hexadecimal digit.
FIGURE 15-1:
A description of each instruction is available in the
PICmicro™
(DS33023).
Note:
Byte-oriented file register operations
Bit-oriented file register operations
Literal and control operations
General
CALL and GOTO instructions only
13
13
13
13
TM
d = 0 for destination W
d = 1 for destination f
f = 7-bit file register address
b = 3-bit bit address
f = 7-bit file register address
k = 8-bit immediate value
k = 11-bit immediate value
OPCODE
assembler.
OPCODE
OPCODE
OPCODE
To maintain upward compatibility with
future PIC16CXXX products, do not use
the OPTION and TRIS instructions.
0xhh
PIC16C781/782
Mid-Range
11
10
10 9
GENERAL FORMAT FOR
INSTRUCTIONS
8
b (BIT #)
d
7
8
6
7
7 6
Reference
k (literal)
DS41171A-page 133
f (FILE #)
k (literal)
f (FILE #)
Manual,
0
0
0
0
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