30F4013 datasheet(160/228 Pages) MICROCHIP

160 / 228 page

dsPIC30F3014/4013

DS70138G-page 160

 2010 Microchip Technology Inc.

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

instruction. In these cases, the execution takes two

instruction

cycles

with

the

additional

instruction

cycle(s) executed as a NOP. Notable exceptions are the

BRA

(unconditional/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 DSC and MCU Pro-

grammer’s

Reference

Manual”

(DS70157).

TABLE 21-1:

SYMBOLS USED IN OPCODE DESCRIPTIONS

Field

Description

#text

Means literal defined by “text”

(text)

Means “content of text”

[text]

Means “the location addressed by text”

{ }

Optional field or operation

<n:m>

Byte mode selection

Double-Word mode selection

Shadow register select

Word mode selection (default)

Acc

One of two accumulators {A, B}

AWB

Accumulator Write-Back Destination Address register

{W13, [W13]+=2}

bit4

4-bit bit selection field (used in word addressed instructions)

{0...15}

C, DC, N, OV, Z

MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero

Expr

Absolute address, label or expression (resolved by the linker)

File register address

{0x0000...0x1FFF}

lit1

1-bit unsigned literal

{0,1}

lit4

4-bit unsigned literal

{0...15}

lit5

5-bit unsigned literal

{0...31}

lit8

8-bit unsigned literal

{0...255}

lit10

10-bit unsigned literal

{0...255} for Byte mode, {0:1023} for Word mode

lit14

14-bit unsigned literal

{0...16384}

lit16

16-bit unsigned literal

{0...65535}

lit23

23-bit unsigned literal

{0...8388608}; LSB must be 0

None

Field does not require an entry, may be blank

OA, OB, SA, SB

DSP Status bits: AccA Overflow, AccB Overflow, AccA Saturate, AccB Saturate

Program Counter

Slit10

10-bit signed literal

{-512...511}

Slit16

16-bit signed literal

{-32768...32767}

Slit6

6-bit signed literal

{-16...16}

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