PIC16C641 Datasheet

IC型号：
PIC16C641
PDF描述：
8-Bit EPROM Microcontrollers with Analog Comparators
文件大小：
661.21KB
PDF页数：
137页
芯片厂家：
MICROCHIP

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PIC16C64X & PIC16C66X

10.0

INSTRUCTION SET SUMMARY

Each PIC16CXX instruction is a 14-bit word divided

into an OPCODE which speci铿乪s the instruction type

and one or more operands which further specify the

operation of the instruction. The PIC16CXX instruction

set summary in Table 10-2 lists

byte-oriented

bit-ori-

ented

, and

literal and control

operations. Table 10-1

shows the opcode 铿乪ld descriptions.

For

byte-oriented

instructions, 'f' represents a 铿乴e reg-

ister designator and 'd' represents a destination desig-

nator. The 铿乴e register designator speci铿乪s which 铿乴e

The destination designator speci铿乪s 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 铿乴e register speci铿乪d in the instruction.

For

bit-oriented

instructions, 'b' represents a bit 铿乪ld

designator which selects the number of the bit affected

by the operation, while 'f' represents the number of the

铿乴e in which the bit is located.

For

literal and control

operations, 'k' represents an

eight or eleven bit constant or literal value.

鈥?/div>

Byte-oriented

operations

鈥?/div>

Bit-oriented

operations

鈥?/div>

Literal and control

operations

All instructions are executed within one single instruc-

tion cycle, unless a conditional test is true or the pro-

gram counter is changed as a result of an instruction.

In this case, the execution takes two instruction cycles

with the second cycle executed as a NOP. One instruc-

tion cycle consists of four oscillator periods. Thus, for

an oscillator frequency of 4 MHz, the normal instruction

execution time is 1

碌

s. If a conditional test is true or the

program counter is changed as a result of an instruc-

tion, the instruction execution time is 2

碌

Table 10-2 lists the instructions recognized by the

MPASM assembler.

Figure 10-1 shows the three general formats that the

instructions can have.

Note:

To maintain upward compatibility with

future PIC16CXX products, do not use the

OPTION

and

TRIS

instructions.

All examples use the following format to represent a

hexadecimal number:

0xhh

where h signi铿乪s a hexadecimal digit.

TABLE 10-1:

Field

OPCODE FIELD

DESCRIPTIONS

Description

Working register (accumulator)

Bit address within an 8-bit 铿乴e register

Literal 铿乪ld, constant data or label

Don't care location (= 0 or 1)

The assembler will generate code with x = 0. It is the

recommended form of use for compatibility with all

Microchip software tools.

FIGURE 10-1: GENERAL FORMAT FOR

INSTRUCTIONS

Byte-oriented

铿乴e register operations

8 7 6

OPCODE

f (FILE #)

d = 0 for destination W

d = 1 for destination f

f = 7-bit 铿乴e register address

Bit-oriented

铿乴e register operations

10 9

7 6

OPCODE

b (BIT #)

f (FILE #)

b = 3-bit bit address

f = 7-bit 铿乴e register address

Literal and control

operations

General

8 7

OPCODE

k = 8-bit immediate value

CALL

and

GOTO

instructions only

OPCODE

k (literal)

Destination select; d = 0: store result in W,

d = 1: store result in 铿乴e register f.

Default is d = 1

label

Label name

TOS

Top of Stack

Program Counter

PCLATH

Program Counter High Latch

GIE

Global Interrupt Enable bit

WDT

Watchdog Timer/Counter

Time-out bit

Power-down bit

dest

Destination either the W register or the speci铿乪d

[ ] Options

( )

Contents

k (literal)

k = 11-bit immediate value

鈫?/div>

鈭?/div>

Assigned to

In the set of

talics

User de铿乶ed term (font is courier)

The instruction set is highly orthogonal and is grouped

into three basic categories:

漏

1996 Microchip Technology Inc.

DS30559A-page 73

This document was created with FrameMaker 4 0 4

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