Описание
PIC18LF2539 offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price – with the addition of high-endurance Enhanced FLASH program memory. The PIC18FXX39 family also provides an off-the-shelf solution for simple motor control applications, allowing users to create speed control solutions with small part counts and short development times The integrated motor control kernel uses on-chip Pulse Width Modulation (PWM) to provide speed control for single phase induction motors. Through a convenient set of Application Program Interfaces (APIs) and variable frequency technology for open loop control, users can develop applications with little or no previous experience in motor control techniques. ProMPT motor control provides modulated output over a range of 0 to 127 Hz, and has a pre-defined V/F curve that can be reprogrammed to suit the application. Memory Endurance: The Enhanced FLASH cells for both program memory and data EEPROM are rated to last for many thousands of erase/write cycles – up to 100,000 for program memory, and 1,000,000 for EEPROM. Data retention without refresh is conservatively estimated to be greater than 100 years at 25°C. Self-programmability: These devices can write to their own program memory spaces under internal software control. By using a bootloader routine located in the protected Boot Block at the top of program memory, it becomes possible to create an application that can update itself in the field. Addressable USART: This serial communication module is capable of standard RS-232 operation using the internal oscillator block, removing the need for an external crystal (and its accompanying power requirement) in applications that talk to the outside world. 10-bit A/D Converter: This module offers up to 8 conversion channels for flexibility in sensor monitoring and control, as well as the ability to do conversions while the device is in SLEEP mode.
- High Performance RISC CPU:
- Linear program memory addressing to 24 Kbytes
- Linear data memory addressing to 1.4 Kbytes
- 20 MHz operation (5 MIPs):
- 20 MHz oscillator/clock input
- 5 MHz oscillator/clock input with PLL active
- 16-bit wide instructions, 8-bit wide data path
- 8 x 8 Single Cycle Hardware Multiplier
- Special Microcontroller Features:
- 100,000 erase/write cycle Enhanced FLASH program memory typical
- 1,000,000 erase/write cycle Data EEPROM memory
- FLASH/Data EEPROM Retention: > 100 years
- Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
- Programmable code protection
- Power saving SLEEP mode
- Single supply 5V In-Circuit Serial Programming™ (ICSP™) via two pins
- In-Circuit Debug (ICD) via two pins Analog Features:
- Compatible 10-bit Analog-to-Digital Converter module (A/D) with:
- Fast sampling rate
- Conversion available during SLEEP
- DNL = ±1 LSb, INL = ±1 LSb
- Programmable Low Voltage Detection (PLVD)
- Supports interrupt on Low Voltage Detection
- Programmable Brown-out Reset (BOR) Peripheral Features:
- High current sink/source 25 mA/25 mA
- Three external interrupt pins
- Timer0 module: 8-bit/16-bit timer/counter with 8-bit programmable prescaler
- Timer1 module: 16-bit timer/counter
- Timer3 module: 16-bit timer/counter
- Secondary oscillator clock option – Timer1/Timer3
- Two PWM modules:
- Resolution is 1- to 10-bit, Max. PWM freq. @ 8-bit resolution = 156 kHz 10-bit resolution = 39 kHz
- Single Phase Induction Motor Control kernel
- Programmable Motor Control Technology (ProMPT™) provides open loop Variable Frequency (VF) control
- User programmable Voltage vs. Frequency curve
- Most suitable for shaded pole and permanent split capacitor type motors
- Master Synchronous Serial Port (MSSP) module with two modes of operation:
- 3-wire SPI™ (supports all 4 SPI modes)
- I2C™ Master and Slave mode
- Addressable USART module:
- Supports RS-485 and RS-232
- Parallel Slave Port (PSP) module CMOS Technology:
- Low power, high speed FLASH/EEPROM technology
- Fully static design
- Wide operating voltage range (2.0V to 5.5V)
- Industrial and Extended temperature ranges
