PIC16F688 Microcontroller: Circuit, Pinout, and Datasheet

The PIC16F688 Flash microcontroller combines the benefits of the well-known mid-range x14 architecture with standardized features such as a 2.0-5.5 volt working voltage range, on-board EEPROM Data Memory, and nanoWatt Technology. Up to 8 channels of 10-bit A/D, an analog comparator module with programmable on-chip voltage reference, and an Enhanced USART (EUSART) peripheral that supports communications protocols such as RS232/485 and the LIN protocol are among the standard analog peripherals.

Symbol

Footprint

3D Model

(1) High-Performance RISC CPU

• Only 35 Instructions to Learn

- All single-cycle instructions except branches

• Speed of operation:

- Oscillator/clock input DC – 20 MHz

- DC – instruction cycle of 200 nanoseconds

• The capacity to interrupt

• Deep Hardware Stack with 8 levels

• Addressing modes: direct, indirect, and relative

(2) Special Microcontroller Features

• Precision Internal Oscillator

- Factory calibrated to 1% accuracy - Frequency range adjustable via software 125 kHz to 8 MHz

- Software that can be tweaked

- Start-Up Mode with Two Speeds

- For critical applications, crystal fail detection

- Changing the clock mode during operation energy conservation

• Sleep mode that saves energy

• Wide range of operating voltages (2.0V-5.5V)

• Wide Temperature Range (Industrial and Extended)

• Reset the power (POR)

• Oscillator Start-up and Power-up Timer (PWRT) Set a timer (OST)

• Software Controlled Brown-out Reset (BOR) Option

• Enhanced Low-Current Watchdog Timer (WDT) with an on-chip oscillator (nominal 268 seconds with full Prescaler, software adjustable) and software enable

• Weak Pull-up or Input Only Pin on Multiplexed Master Clear

• High-Endurance • Programmable Code Protection Cell for Flash/EEPROM:

- 100,000 writes in Flash memory - 1,000,000 writes in EEPROM memory

- Retention of Flash/Data EEPROM: > 40 years

(3) Low-Power Features

• Standby Current

- 50 nA @ 2.0V, typical

• Operating Current: Typical: 11μA @ 32 kHz, 2.0V

- Typical 220μA @ 4 MHz, 2.0V

• Current of the Watchdog Timer: 1μA @ 2.0V, typical

(4) Peripheral Features

• 12 I/O Pins, each having its own direction Control:

- Direct LED drive using a high-current source/sink

- Change-on-interrupt pin

- Weak pull-ups that can be programmed individually

- Wake-up with Ultra-Low Power

• Two analog comparators are included in the Analog Comparator module.

- On-chip Voltage Reference (CVREF) module that can be programmed ( percent of VDD)

- Externally accessible comparator inputs and outputs

• Analog-to-Digital Converter (A/D):

- 8 channels and 10-bit resolution

• Timer0: 8-bit Timer/Counter with Programmable Prescaler of 8 bits

• Improved Timer1:

- Prescaler and 16-bit timer/counter

- Timer1 Gate (External) (count enable)

• Enhanced USART Module: Use OSC1 and OSC2 in LP mode as Timer1 oscillators if INTOSC mode is enabled.

- RS-485, RS-232, LIN 2.0/2.1, and J2602 are all supported.

- Automatic Baud Detection

• In-Circuit Serial ProgrammingTM (ICSPTM) via two pins • Auto-wake-up on Start bit

Microchip Technology PIC16F688-I/P technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology PIC16F688-I/P.

We'll start with a simple experiment that turns an LED on and off. While it appears to be a basic project, it is the perfect place to begin because it ensures that we have properly written the software, compiled it, loaded it into the PIC, and built the circuit correctly on the breadboard.

In this lab, we'll attach an LED to one of the PIC16F688's port pins and have it flash constantly for 1 second.We'll start with a simple experiment that turns an LED on and off. While it appears to be a basic project, it is the perfect place to begin because it ensures that we have properly written the software, compiled it, loaded it into the PIC, and built the circuit correctly on the breadboard.

In this lab, we'll attach an LED to one of the PIC16F688's port pins and have it flash constantly for 1 second.

We'll add a light-emitting-diode (LED) to port pin RC0 (10) and a current-limiting resistor (470 Ohm) in series to our basic breadboard setup. The circuit diagram in its entirety is presented below.

Flashing LED circuit

Prototyped circuit on the breadboard

Functional Block Diagram

• Consumer Electronics

• Embedded Design & Development

• System Monitoring

• Test & Measurement

• Clock & Timing

• Automotive

Microchip Technology Incorporated is a major producer of embedded control solutions that are smart, connected, and secure. Customers can generate optimal designs with its easy-to-use development tools and extensive product selection, which decrease risk while cutting overall system cost and time to market. More than 120,000 customers use the company's solutions in the industrial, automotive, consumer, aerospace and defense, communications, and computing areas. Microchip, based in Chandler, Arizona, provides excellent technical support as well as consistent delivery and quality.

Download datasheets and manufacturer documentation for Microchip Technology PIC16F688-I/P.