參數(shù)資料
型號： DV164136
廠商： Microchip Technology
文件頁數(shù)： 75/107頁
文件大?。?/td> 0K
描述： DEVELOPMENT KIT FOR PIC18
產(chǎn)品培訓模塊： PIC18 J Series MCU Overview
標準包裝： 1
系列： PIC®
類型： MCU
適用于相關產(chǎn)品： PIC18F8722，PIC18F87J11
所含物品： 板，線纜，CD，PICkit? 3 個編程器，電源
產(chǎn)品目錄頁面： 659 (CN2011-ZH PDF)
相關產(chǎn)品： PIC18F87J11-I/PT-ND - IC PIC MCU FLASH 64KX16 80TQFP
PIC18F87J11T-I/PTTR-ND - IC PIC MCU FLASH 64KX16 80TQFP
PIC18F8722T-E/PT-ND - IC PIC MCU FLASH 64KX16 80TQFP
PIC18F8722-E/PT-ND - IC PIC MCU FLASH 64KX16 80TQFP
PIC18F8722T-I/PT-ND - IC PIC MCU FLASH 64KX16 80TQFP
PIC18F8722-I/PT-ND - IC PIC MCU FLASH 64KX16 80TQFP
2007-2012 Microchip Technology Inc.
DS39778E-page 7
PIC18F87J11 FAMILY
1.0
DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
This family introduces a line of low-voltage, general
purpose microcontrollers with the main traditional
advantage of all PIC18 microcontrollers, namely, high
computational performance and a rich feature set at an
extremely competitive price point. These features
make the PIC18F87J11 family a logical choice for
many high-performance applications, where an
extended peripheral feature set is required, and cost is
a primary consideration.
1.1
Core Features
1.1.1
TECHNOLOGY
All of the devices in the PIC18F87J11 family incorporate
a range of features that can significantly reduce power
consumption during operation. Key items include:
Alternate Run Modes: By clocking the controller
from the Timer1 source or the internal RC oscilla-
tor, power consumption during code execution
can be reduced by as much as 90%.
Multiple Idle Modes: The controller can also run
with its CPU core disabled but the peripherals still
active. In these states, power consumption can be
reduced even further, to as little as 4% of normal
operation requirements.
On-the-Fly Mode Switching: The
power-managed modes are invoked by user code
during operation, allowing the user to incorporate
power-saving ideas into their application’s
software design.
1.1.2
OSCILLATOR OPTIONS AND
FEATURES
All of the devices in the PIC18F87J11 family offer four
different oscillator options, allowing users a range of
choices in developing application hardware. These
include:
Two Crystal modes, using crystals or ceramic
resonators.
Two External Clock modes, offering the option of
a divide-by-4 clock output.
An internal oscillator block which provides an
8 MHz clock and an INTRC source (approximately
31 kHz, stable over temperature and VDD).
The oscillator block also provides a range of
6 user-selectable clock frequencies, between
125 kHz to 4 MHz, for a total of 8 clock
frequencies. This option frees an oscillator pin for
use as an additional general purpose I/O.
A Phase Lock Loop (PLL) frequency multiplier,
available to all of the oscillator modes, which
allows a wide range of clock speeds from 16 MHz
to 40 MHz
The internal oscillator block provides a stable reference
source that gives the family additional features for
robust operation:
Fail-Safe Clock Monitor: This option constantly
monitors the main clock source against a reference
signal provided by the internal oscillator. If a clock
failure occurs, the controller is switched to the
internal oscillator, allowing for continued low-speed
operation or a safe application shutdown.
Two-Speed Start-up: This option allows the
internal oscillator to serve as the clock source
from Power-on Reset, or wake-up from Sleep
mode, until the primary clock source is available.
1.1.3
EXPANDED MEMORY
The PIC18F87J11 family provides ample room for
application code, from 64 Kbytes to 128 Kbytes of code
space. The Flash cells for program memory are rated
to last up to 10,000 erase/write cycles. Data retention
without refresh is conservatively estimated to be
greater than 20 years.
The Flash program memory is readable, writable, and
during normal operation, the PIC18F87J11 family also
provides plenty of room for dynamic application data,
with up to 3904 bytes of data RAM.
1.1.4
EXTERNAL MEMORY BUS
In the event that 128 Kbytes of memory are inadequate
for an application, the 80-pin members of the
PIC18F87J11 family also implement an External Mem-
ory Bus (EMB). This allows the controller’s internal
Program Counter (PC) to address a memory space of
up to 2 Mbytes, permitting a level of data access that
few 8-bit devices can claim. This allows additional
memory options, including:
Using combinations of on-chip and external
memory up to the 2-Mbyte limit
Using external Flash memory for reprogrammable
application code or large data tables
Using external RAM devices for storing large
amounts of variable data
1.1.5
EXTENDED INSTRUCTION SET
The PIC18F87J11 family implements the optional
extension to the PIC18 instruction set, adding 8 new
instructions and an Indexed Addressing mode.
Enabled as a device configuration option, the extension
has been specifically designed to optimize re-entrant
application code, originally developed in high-level
languages, such as ‘C’.
PIC18F66J11
PIC18F86J11
PIC18F66J16
PIC18F86J16
PIC18F67J11
PIC18F87J11
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