DSPIC33FJ64GP706AI/PF View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

DSPIC33FJ64GP706AI/PF

High-Performance, 16-Bit Digital Signal Controllers

Microchip Technology 

dsPIC33FJXXXGPX06A/X08A/X10A

All instructions are a single word, except for certain

double-word instructions, which were made

double-word instructions so that all the required

information is available in these 48 bits. In the second

word, the 8 MSbs are ‘0’s. If this second word is

executed as an instruction (by itself), it will execute as

a NOP.

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 skip-

ping 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

Programmer’s Reference Manual”

(DS70157).

TABLE 23-1: 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

Wb

Wd

Wdo

Wm,Wn

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, Sticky 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}

Base W register ∈ {W0..W15}

Destination W register ∈ { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] }

Destination W register ∈

{ Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] }

Dividend, Divisor working register pair (direct addressing)

DS70593C-page 260

© 2011 Microchip Technology Inc.

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