PIC16CE62X
The instruction set is highly orthogonal and is grouped
into three basic categories:
11.0 INSTRUCTION SET SUMMARY
Each PIC16CE62X 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 PIC16CE62X instruc-
tion set summary in Table 11-2 lists byte-oriented,
bit-oriented, and literal and control operations.
Table 11-1 shows the opcode field descriptions.
• Byte-oriented operations
• Bit-oriented operations
• Literal and control operations
All instructions are executed within one single
instruction cycle, unless a conditional test is true or the
program counter is changed as
a result of an
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.
instruction. In this case, the execution takes two
instruction cycles with the second cycle executed as a
NOP. One instruction cycle consists of four oscillator
periods.Thus, for an oscillator frequency of 4 MHz, the
normal instruction execution time is 1 µs. If
a
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.
conditional test is true or the program counter is
changed as a result of an instruction, the instruction
execution time is 2 µs.
Table 11-1 lists the instructions recognized by the
MPASM assembler.
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.
Figure 11-1 shows the three general formats that the
instructions can have.
For literal and control operations, 'k' represents an
eight or eleven bit constant or literal value.
Note: To maintain upward compatibility with
future PICmicro™ products, do not use the
OPTIONand TRISinstructions.
TABLE 11-1: OPCODE FIELD
DESCRIPTIONS
All examples use the following format to represent a
hexadecimal number:
Field
Description
0xhh
f
W
b
k
x
Register file address (0x00 to 0x7F)
Working register (accumulator)
where h signifies a hexadecimal digit.
FIGURE 11-1: GENERAL FORMAT FOR
INSTRUCTIONS
Bit address within an 8-bit file register
Literal field, constant data or label
Don't care location (= 0 or 1)
Byte-oriented file register operations
The assembler will generate code with x = 0. It is the
recommended form of use for compatibility with all
Microchip software tools.
13
8
7
6
0
0
OPCODE
d
f (FILE #)
d
Destination select; d = 0: store result in W,
d = 1: store result in file register f.
Default is d = 1
d = 0 for destination W
d = 1 for destination f
f = 7-bit file register address
label Label name
TOS Top of Stack
PC Program Counter
Bit-oriented file register operations
13 10 9
b (BIT #)
7
6
OPCODE
f (FILE #)
PCLATH
Program Counter High Latch
GIE Global Interrupt Enable bit
WDT Watchdog Timer/Counter
TO Time-out bit
b = 3-bit bit address
f = 7-bit file register address
PD Power-down bit
Literal and control operations
dest Destination either the W register or the specified
register file location
General
[ ] Options
13
8
7
0
0
Contents
( )
→
OPCODE
k (literal)
Assigned to
k = 8-bit immediate value
Register bit field
In the set of
< >
CALLand GOTOinstructions only
13 11 10
OPCODE
k = 11-bit immediate value
User defined term (font is courier)
italics
k (literal)
1998 Microchip Technology Inc.
Preliminary
DS40182A-page 65
MICROCHIP [ MICROCHIP ]
