Datasheet

 2010 Microchip Technology Inc. DS39940D-page 9
PIC24FJ64GB004 FAMILY
1.0 DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
This family expands on the existing line of Microchip‘s
16-bit microcontrollers, combining an expanded
peripheral feature set and enhanced computational
performance with a new connectivity option: USB
On-The-Go (OTG). The PIC24FJ64GB004 family
provides a new platform for high-performance USB
applications which may need more than an 8-bit
platform, but do not require the power of a digital signal
processor.
1.1 Core Features
1.1.1 16-BIT ARCHITECTURE
Central to all PIC24F devices is the 16-bit modified
Harvard architecture, first introduced with Microchip’s
dsPIC
®
digital signal controllers. The PIC24F CPU core
offers a wide range of enhancements, such as:
• 16-bit data and 24-bit address paths with the
ability to move information between data and
memory spaces
• Linear addressing of up to 12 Mbytes (program
space) and 64 Kbytes (data)
• A 16-element working register array with built-in
software stack support
• A 17 x 17 hardware multiplier with support for
integer math
• Hardware support for 32 by 16-bit division
• An instruction set that supports multiple
addressing modes and is optimized for high-level
languages, such as ‘C’
• Operational performance up to 16 MIPS
1.1.2 POWER-SAVING TECHNOLOGY
All of the devices in the PIC24FJ64GB004 family
incorporate a range of features that can significantly
reduce power consumption during operation. Key
items include:
• On-the-Fly Clock Switching: The device clock
can be changed under software control to the
Timer1 source or the internal, Low-Power Internal
RC Oscillator during operation, allowing the user
to incorporate power-saving ideas into their
software designs.
• Doze Mode Operation: When timing-sensitive
applications, such as serial communications,
require the uninterrupted operation of peripherals,
the CPU clock speed can be selectively reduced,
allowing incremental power savings without
missing a beat.
• Instruction-Based Power-Saving Modes: There
are three instruction-based power-saving modes:
- Idle Mode – The core is shut down while leaving
the peripherals active.
- Sleep Mode – The core and peripherals that
require the system clock are shut down, leaving
the peripherals active that use their own clock or
the clock from other devices.
- Deep Sleep Mode – The core, peripherals
(except RTCC and DSWDT), Flash and SRAM
are shut down for optimal current savings to
extend battery life for portable applications.
1.1.3 OSCILLATOR OPTIONS AND
FEATURES
All of the devices in the PIC24FJ64GB004 family offer
five 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-2 clock output.
• A Fast Internal RC Oscillator (FRC) with a
nominal 8 MHz output, which can also be divided
under software control to provide clock speeds as
low as 31 kHz.
• A Phase Lock Loop (PLL) frequency multiplier
available to the external oscillator modes and the
FRC Oscillator, which allows clock speeds of up
to 32 MHz.
• A separate Low-Power Internal RC Oscillator
(LPRC) with a fixed 31 kHz output, which pro-
vides a low-power option for timing-insensitive
applications.
The internal oscillator block also provides a stable
reference source for the Fail-Safe Clock Monitor. This
option constantly monitors the main clock source
against a reference signal provided by the internal
oscillator and enables the controller to switch to the
internal oscillator, allowing for continued low-speed
operation or a safe application shutdown.
1.1.4 EASY MIGRATION
Regardless of the memory size, all devices share the
same rich set of peripherals, allowing for a smooth
migration path as applications grow and evolve. The
consistent pinout scheme used throughout the entire
family also aids in migrating from one device to the next
larger device.
The PIC24F family is pin-compatible with devices in the
dsPIC33 family, and shares some compatibility with the
pinout schema for PIC18 and dsPIC30 devices. This
extends the ability of applications to grow from the
relatively simple, to the powerful and complex, yet still
selecting a Microchip device.
• PIC24FJ32GB002 • PIC24FJ32GB004
• PIC24FJ64GB002 • PIC24FJ64GB004