PIC18F4520 Microcontroller: Features, Pinout, and Datasheet

PIC18F4520 is a Microchip PIC microcontroller that is mostly utilized in automation and embedded systems. It is available in three packages: PDIP, QFN, and TQFP. The first is a 40-pin package (which is the most common), while the other two have a 44-pin interface. 

This microcontroller version has a CPU, timers, a 10-bit ADC, and other peripherals for developing connections with external devices. This PIC version, like others in the PIC community, includes everything needed to build an embedded system and automate processes.

The PIC18F4520 has 32K of program memory, 256 bytes of EEPROM data memory, 1536 bytes of RAM, and 256 bytes of EEPROM data memory. It also has two comparators, a 10-bit A/D converter with 13 channels, and decent memory endurance of roughly 1,000,000 for EEPROM and 100,000 for program memory. EUSART (Enhanced Universal Asynchronous Receiver Transmitter) is a feature that can be used to develop serial connections with other devices.

The chip includes an asynchronous serial port that can be connected in either direction, using either the 3-wire Serial Peripheral Interface (SPI™) or the 2-wire Inter-Integrated Circuit (I²C™) Bus.

Pinout

Symbol

Footprint

3D Model

(1) Power Management Features

• Run: CPU on, Peripherals on

• Idle: CPU off, Peripherals on

• Sleep: CPU off, Peripherals off

• Ultra Low 50nA Input Leakage

• Run mode Currents Down to 11 μA Typical

• Idle mode Currents Down to 2.5 μA Typical

• Sleep mode Current Down to 100 nA Typical

• Timer1 Oscillator: 900 nA, 32 kHz, 2V

• Watchdog Timer: 1.4 μA, 2V Typical

• Two-Speed Oscillator Start-up

(2) Flexible Oscillator Structure

• Four Crystal modes, up to 40 MHz

• 4x Phase Lock Loop (PLL) – Available for Crystal and Internal Oscillators

• Two External RC modes, up to 4 MHz

• Two External Clock modes, up to 40 MHz

• Internal Oscillator Block:

- Fast wake from Sleep and Idle, 1 μs typical

- 8 use-selectable frequencies, from 31 kHz to 8 MHz

- Provides a complete range of clock speeds from 31 kHz to 32 MHz when used with PLL

- User-tunable to compensate for frequency drift

• Secondary Oscillator using Timer1 @ 32 kHz

• Fail-Safe Clock Monitor:

- Allows for safe shutdown if peripheral clock stops

(3) Peripheral Highlights

• High-Current Sink/Source 25 mA/25 mA

• Three Programmable External Interrupts

• Four Input Change Interrupts

• Up to 2 Capture/Compare/PWM (CCP) modules, one with Auto-Shutdown (28-pin devices)

• Enhanced Capture/Compare/PWM (ECCP) module (40/44-pin devices only):

- One, two or four PWM outputs

- Selectable polarity

- Programmable dead time

- Auto-shutdown and auto-restart Peripheral Highlights (Continued):

• Master Synchronous Serial Port (MSSP) module Supporting 3-Wire SPI (all 4 modes) and I2C™ Master and Slave modes

• Enhanced Addressable USART module:

- Supports RS-485, RS-232 and LIN/J2602

- RS-232 operation using internal oscillator block (no external crystal required)

- Auto-wake-up on Start bit

- Auto-Baud Detect

• 10-Bit, up to 13-Channel Analog-to-Digital (A/D) Converter module:

- Auto-acquisition capability

- Conversion available during Sleep

• Dual Analog Comparators with Input Multiplexing

• Programmable 16-Level High/Low-Voltage Detection (HLVD) module:

- Supports interrupt on High/Low-Voltage Detection

(4) Special Microcontroller Features

• C Compiler Optimized Architecture

- Optional extended instruction set designed to optimize re-entrant code

• 100,000 Erase/Write Cycle Enhanced Flash Program Memory Typical

• 1,000,000 Erase/Write Cycle Data EEPROM Memory Typical

• Flash/Data EEPROM Retention: 100 Years Typical

• Self-Programmable under Software Control

• Priority Levels for Interrupts

• 8 x 8 Single-Cycle Hardware Multiplier

• Extended Watchdog Timer (WDT)

- Programmable period from 4 ms to 131s

• Single-Supply 5V In-Circuit Serial Programming™ (ICSP™) via Two Pins

• In-Circuit Debug (ICD) via Two Pins

• Wide Operating Voltage Range: 2.0V to 5.5V

• Programmable Brown-out Reset (BOR) with Software Enable Option

Functional Block Diagram

• PIC18F4520 is widely used in home and industrial automation

• Student projects for motor controlling and sensor interfacing

• GPS and security systems

• Gas sensor projects

• Production of temperature data logger

• Serial Communication

• Central heating projects

• Embedded system

Package

Microchip Technology Incorporated is a leading manufacturer of smart, networked, and secure embedded control solutions. Customers may create optimal designs using the company's simple development tools and broad product choices, which reduce risk while lowering overall system costs and time to market. The company's technologies are used by over 120,000 clients in the industrial, automotive, consumer, aerospace and defense, communications, and computing sectors. Microchip, based in Chandler, Arizona, offers outstanding technical support as well as dependable delivery and quality.