dspic33fj128mc706at-i-pt Microchip Technology Inc., dspic33fj128mc706at-i-pt Datasheet - Page 263

• Manufacturer Part Number: dspic33fj128mc706at-i-pt
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

24.0
The dsPIC33F instruction set is identical to that of the
dsPIC30F.
Most instructions are a single program memory word
(24 bits). Only three instructions require two program
memory locations.
Each single-word instruction is a 24-bit word, divided
into an 8-bit opcode, which specifies the instruction
type and one or more operands, which further specify
the operation of the instruction.
The instruction set is highly orthogonal and is grouped
into five basic categories:
• Word or byte-oriented operations
• Bit-oriented operations
• Literal operations
• DSP operations
• Control operations
Table 24-1 shows the general symbols used in
describing the instructions.
The dsPIC33F instruction set summary in Table 24-2
lists all the instructions, along with the status flags
affected by each instruction.
Most word or byte-oriented W register instructions
(including
operands:
• The first source operand which is typically a
• The second source operand which is typically a
• The destination of the result which is typically a
However, word or byte-oriented file register instructions
have two operands:
• The file register specified by the value ‘f’
• The destination, which could either be the file
© 2009 Microchip Technology Inc.
Note:
register ‘Wb’ without any address modifier
register ‘Ws’ with or without an address modifier
register ‘Wd’ with or without an address modifier
register ‘f’ or the W0 register, which is denoted as
‘WREG’
INSTRUCTION SET SUMMARY
This data sheet summarizes the features
of
X10A family of devices. However, it is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the related section
in the “dsPIC33F Family Reference
Manual”, which is available from the
Microchip web site (www.microchip.com).
barrel
the
shift
dsPIC33FJXXXMCX06A/X08A/
dsPIC33FJXXXMCX06A/X08A/X10A
instructions)
have
three
Preliminary
Most bit-oriented instructions (including simple rotate/
shift instructions) have two operands:
• The W register (with or without an address
• The bit in the W register or file register
The literal instructions that involve data movement may
use some of the following operands:
• A literal value to be loaded into a W register or file
• The W register or file register where the literal
However, literal instructions that involve arithmetic or
logical operations use some of the following operands:
• The first source operand which is a register ‘Wb’
• The second source operand which is a literal
• The destination of the result (only if not the same
The MAC class of DSP instructions may use some of the
following operands:
• The accumulator (A or B) to be used (required
• The W registers to be used as the two operands
• The X and Y address space prefetch operations
• The X and Y address space prefetch destinations
• The accumulator write back destination
The other DSP instructions do not involve any
multiplication and may include:
• The accumulator to be used (required)
• The source or destination operand (designated as
• The amount of shift specified by a W register ‘Wn’
The control instructions may use some of the following
operands:
• A program memory address
• The mode of the table read and table write
modifier) or file register (specified by the value of
‘Ws’ or ‘f’)
(specified by a literal value or indirectly by the
contents of register ‘Wb’)
register (specified by the value of ‘k’)
value is to be loaded (specified by ‘Wb’ or ‘f’)
without any address modifier
value
as the first source operand) which is typically a
register ‘Wd’ with or without an address modifier
operand)
Wso or Wdo, respectively) with or without an
address modifier
or a literal value
instructions
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