The microcontroller is a single-chip microcomputer that integrates the main part of the microcomputer on a chip. With the development of technology, microcontrollers have become more and more powerful, which makes their applications ubiquitous and in various fields. For example, motor control, barcode reader/scanner, consumer electronics, gaming equipment, telephone, HVAC, building security and access control, industrial control and automation, and white goods (washing machine, microwave oven), etc.

Pin Diagrams:
Pin Diagram - 28-Pin SPDIP/SOIC/SSOP

Microcontroller Features:
? Precision Internal Oscillator:- Factory calibrated to ±1%, typical- Software selectable frequency range from 32 MHz to 31 kHz
? Power-Saving Sleep mode
? Power-on Reset (POR)
? Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
? Brown-out Reset (BOR):- Selectable between two trip points- Disable in Sleep option
? Multiplexed Master Clear with Pull-up/Input Pin
? Programmable Code Protection
? Wide Operating Voltage Range:- 1.8V-5.5V (PIC16F1938)- 1.8V-3.6V (PIC16LF1938)

Low-Power Features:

? Standby Current:- 60 nA @ 1.8V, typical
? Operating Current:-43μA/MHz @ 1.8V, typical
? Timer1 Oscillator Current:- 600 nA @ 32 kHz, 1.8V, typical
? Low-Power Watchdog Timer Current:- 500 nA @ 1.8V, typical

Peripheral Features:
? Up to 35 I/O Pins and 1 Input-only pin:- High-current source/sink for direct LED drive- Individually programmable Interrupt-on- pin change pins- Individually programmable weak pull-ups
? Integrated LCD Controller:- Up to 96 segments- Variable clock input- Contrast control- Internal voltage reference selections
? Capacitive Sensing module (mTouchTM):- Up to 16 selectable channels
? A/D Converter:- 10-bit resolution and up to 14 channels- Selectable 1.024/2.048/4.096V voltage reference
? Timer0: 8-Bit Timer/Counter with 8-Bit Programmable Prescaler
? Enhanced Timer1:- Dedicated low-power 32 kHz oscillator driver- 16-bit timer/counter with prescaler- External Gate Input mode with toggle and single-shot modes - Interrupt-on-gate completion
? Timer2, 4, 6: 8-Bit Timer/Counter with 8-Bit Period Register, Prescaler and Postscaler
? Two Capture, Compare, PWM Modules (CCP):- 16-bit Capture, max. resolution 125 ns- 16-bit Compare, max. resolution 125 ns-10-bit PWM, max. frequency 31.25 kHz
? Three Enhanced Capture, Compare, PWM modules (ECCP):- 3 PWM time-base options- Auto-shutdown and auto-restart- PWM steering- Programmable Dead-band Delay
? Master Synchronous Serial Port (MSSP) with SPI and I2CTM with:- 7-bit address masking- SMBus/PMBusTM compatibility- Auto-wake-up on start
? Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART):- RS-232, RS-485 and LIN compatible- Auto-Baud Detect
? SR Latch (555 Timer):- Multiple Set/Reset input options- Emulates 555 Timer applications
? 2 Comparators:- Rail-to-rail inputs/outputs - Power mode control- Software enable hysteresis
? Voltage Reference module:- Fixed Voltage Reference (FVR) with 1.024V, 2.048V and 4.096V output levels- 5-bit rail-to-rail resistive DAC with positive and negative reference selection