PIC18F458-E/PT chip overview
PIC18F458-E/PT belongs to PIC18 series MCU of Microchip, which is widely used in embedded system design. Its built-in high-performance features make it very suitable for various applications with high requirements for speed and flexibility. This chip combines powerful data processing capability, rich peripheral integration and low power consumption characteristics, making it an ideal choice for industries such as industrial control, household appliances, automotive electronics and consumer electronics.
PIC18F458-E/PT is a single-chip microcomputer based on Enhanced Mid Range architecture. It has an execution speed of up to 10 MIPS and supports multiple operation modes. Its built-in Flash program memory makes the development process more simple, and program updates and upgrades become convenient and fast. In addition, PIC18F458 is also equipped with a number of PWM, ADC, UART and other rich peripheral interfaces, which is convenient for users to apply in different occasions.
Detailed parameters
PIC18F458-E/PT has a variety of technical characteristics and detailed parameters, including but not limited to the following:
-Processor core: high-performance 8-bit microprocessor. -Program memory: 32 KB Flash. -Data memory: 1536 byte SRAM, 256 byte EEPROM. -I/O ports: Up to 36 programmable I/O pins (18 digital I/O ports, and specific pins that support multiple functions). -Operating frequency: max. 20 MHz. -Timer: 3 8-bit timers and 1 16 bit timer. -Analog digital conversion: 10 bit ADC, supporting up to 13 input channels. -Communication interface: including multiple serial communication UART, SPI, I2C, etc. -PWM characteristics: up to 6 PWM signal outputs can be provided. -Operating voltage range: 2.0V to 5.5V.
Manufacturer, packaging and packaging
The manufacturer of PIC18F458-E/PT is Microchip Technology Inc., a leading global provider of micro controllers and analog semiconductor solutions. The package type of the chip is DIP (dual in-line package), and the specific package size is 28 pins. DIP packaging is suitable for beginners and rapid prototyping, because it can be easily inserted into bread boards and other experimental equipment.
Description of pin and circuit diagram
The pin distribution design of PIC18F458-E/PT is relatively reasonable, and each functional pin is clear and easy to connect peripherals. The following is a brief description of the pins:
-VDD (pin 20): power supply pin, connected to positive power supply. -VSS (pin 9): ground pin, used to connect to system ground. -RA0-RA7 (pins 1-8): Programmable I/O port, supporting input and output operations. -RB0-RB7 (pins 17-10): It is also a programmable I/O port, and some pins can be used for external interrupts. -RC0-RC7 (pin 18-15): Multi purpose I/O port including PWM output and serial communication function. -TX/RX (pins 6, 7): transmit and receive pins for serial communication. -MCLR (pin 1): reset the pin. Pull it down to reset the chip. The specific circuit connection list of this pin diagram can be found in the official documents and design manuals of Microchip, and is usually used to create reference circuits.
Use Cases
The use cases of PIC18F458-E/PT in different application scenarios are extremely rich, and several typical applications are shown below.
1. Data acquisition system: ADC function of this chip can be used to read analog signals of sensors, such as temperature, pressure and humidity. By using SPI or I2C interface, data can also be sent to external devices, such as LCD display or other control units.
2. Motor control: In combination with PWM output, PIC18F458-E/PT can achieve accurate control of DC motor or stepping motor. By adjusting the PWM duty cycle, the speed and direction of the motor can be controlled.
3. Home automation: In the field of smart home, PIC18F458 can be combined with various wireless modules (such as RF and Bluetooth modules) to perform remote control and monitoring. In this application, various I/O and communication interfaces of the chip can easily connect various sensors and actuators.
4. Portable instrument: PIC18F458's low power consumption makes it suitable for portable equipment. In the case of battery power supply, optimize the software to reduce power consumption and improve the ability to run for a long time.
5. Retail and payment system: PIC18F458 can be used to build payment terminals in combination with user input devices (such as keyboards or touch screens) and network modules. In this situation, the chip's fast data processing capability and rich peripheral interfaces complement each other.
The above example shows the extensive application of PIC18F458-E/PT in various industries, giving full play to its characteristics of high performance and high integration. Whether in industrial control, intelligent devices or consumer electronics, the chip plays an indispensable role and provides a powerful tool for developers.
