Описание
This family introduces a new line of Microchip devices: a 16-bit RISC microcontroller family with a broad peripheral feature set and enhanced computational performance. The PIC24FJ128GA family offers a new migration option for those high-performance applications which may be outgrowing their 8-bit platforms, but don’t require the numerical processing power of a digital signal processor. Core Features 16-BIT ARCHITECTURE Central to all PIC24 devices is the 16-bit modified Harvard architecture, first introduced with Microchip’s dsPIC digital signal controllers. The PIC24 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 8 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 POWER-SAVING TECHNOLOGY All of the devices in the PIC24FJ128GA 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 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: The microcontroller can suspend all operations, or selectively shut down its core while leaving its peripherals active, with a single instruction in software. OSCILLATOR OPTIONS AND FEATURES All of the devices in the PIC24FJ128GA 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 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 internal RC oscillator (LPRC) with a fixed 31 kHz output, which provides 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.
- High-Performance CPU:
- Modified Harvard Architecture
- Up to 16 MIPS operation @ 32 MHz
- 8 MHz internal oscillator:
- 4x PLL option
- Multiple divide options
- 17-bit x 17-bit Single-Cycle Hardware Fractional/Integer Multiplier
- 32-bit by 16-bit Hardware Divider
- 16 x 16-bit Working Register Array
- C compiler Optimized Instruction Set Architecture:
- 76 base instructions
- Flexible addressing modes
- Linear Program Memory Addressing up to 12 Mbytes
- Linear Data Memory Addressing up to 64 Kbytes
- Two Address Generation Units for separate Read and Write Addressing of Data Memory
- Special Microcontroller Features:
- Operating Voltage Range of 2.0V to 3.6V
- Flash Program Memory:
- 1000 erase/write cycles, typical
- Flash retention 20 years, typical
- Self-Reprogrammable under Software Control
- Selectable Power Management modes:
- Sleep, Idle and Alternate Clock modes
- Fail-Safe Clock Monitor operation:
- Detects clock failure and switches to on-chip, low-power RC oscillator
- On-Chip LDO Regulator
- JTAG Boundary Scan and Programming Support
- Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
- Flexible Watchdog Timer (WDT) with On-Chip, Low-Power RC Oscillator for reliable operation
- In-Circuit Serial Programming™ (ICSP™) and In-Circuit Emulation (ICE) via 2 pins
- Analog Features:
- 10-bit, up to 16-channel Analog-to-Digital Converter (A/D):
- 500 ksps conversion rate
- Conversion available during Sleep and Idle
- Dual Analog Comparators with Programmable Input/Output Configuration
- Peripheral Features:
- Two 3-wire/4-wire SPI modules, supporting 4 Frame modes with 4-level FIFO Buffer
- Two I2C™ modules support Multi-Master/Slave mode and 7-bit/10-bit Addressing
- Two UART modules:
- Supports RS-232, RS-485 and LIN 1.2
- Supports IrDA® with on-chip hardware endec
- Auto-Wake-up on Start bit
- Auto-Baud Detect
- 4-level FIFO buffer
- Parallel Master Slave Port (PMP/PSP):
- Supports 8-bit or 16-bit data
- Supports 16 address lines
- Hardware Real-Time Clock/Calendar (RTCC):
- Provides clock, calendar and alarm functions
- Five 16-bit Timers/Counters with Programmable prescaler
- Five 16-bit Capture Inputs
- Five 16-bit Compare/PWM Outputs
- High-Current Sink/Source on select I/O pins: 18 mA/18 mA
- Configurable Open-Drain Output on Digital I/O pins
- Up to 5 External Interrupt Sources
