DSPIC30F4011-30I-P Datasheet, PDF (166/238 Pages) Microchip Technology – High-Performance, 16-Bit Digital Signal Controllers

dsPIC30F4011/4012
Most single-word instructions are executed in a single
instruction cycle, unless a conditional test is true or the
program counter is changed as a result of the instruc-
tion. In these cases, the execution takes two instruction
cycles with the additional instruction cycle(s) executed
as a NOP. Notable exceptions are the BRA (uncondi-
tional/computed branch), indirect CALL/GOTO, all table
reads and writes and RETURN/RETFIE instructions,
which are single-word instructions but take two or three
cycles. Certain instructions that involve skipping over
the subsequent instruction, require either two or three
cycles if the skip is performed, depending on whether
the instruction being skipped is a single-word or two-
word instruction. Moreover, double-word moves
require two cycles. The double-word instructions
execute in two instruction cycles.
Note:
For more details on the instruction set,
refer to the “16-bit MCU and DSC
Reference Manual” (DS70157).
TABLE 22-1: SYMBOLS USED IN OPCODE DESCRIPTIONS
Field
Description
#text
(text)
[text]
{}
<n:m>
.b
.d
.S
.w
Acc
AWB
bit4
C, DC, N, OV, Z
Expr
f
lit1
lit4
lit5
lit8
lit10
lit14
lit16
lit23
None
OA, OB, SA, SB
PC
Slit10
Slit16
Slit6
Means literal defined by “text“
Means “content of text“
Means “the location addressed by text”
Optional field or operation
Register bit field
Byte mode selection
Double-Word mode selection
Shadow register select
Word mode selection (default)
One of two accumulators {A, B}
Accumulator Write-Back Destination Address register ∈ {W13, [W13]+=2}
4-bit bit selection field (used in word addressed instructions) ∈ {0...15}
MCU Status bits: Carry, Digit Carry, Negative, Overflow, Zero
Absolute address, label or expression (resolved by the linker)
File register address ∈ {0x0000...0x1FFF}
1-bit unsigned literal ∈ {0,1}
4-bit unsigned literal ∈ {0...15}
5-bit unsigned literal ∈ {0...31}
8-bit unsigned literal ∈ {0...255}
10-bit unsigned literal ∈ {0...255} for Byte mode, {0:1023} for Word mode
14-bit unsigned literal ∈ {0...16384}
16-bit unsigned literal ∈ {0...65535}
23-bit unsigned literal ∈ {0...8388608}; LSB must be 0
Field does not require an entry, may be blank
DSP Status bits: ACCA Overflow, ACCB Overflow, ACCA Saturate, ACCB Saturate
Program Counter
10-bit signed literal ∈ {-512...511}
16-bit signed literal ∈ {-32768...32767}
6-bit signed literal ∈ {-16...16}
DS70135G-page 166
© 2010 Microchip Technology Inc.