PIC16LC621-04I/SO

Program Memory Type:	OTP
Base Part Number:	PIC16LC621
Supplier Device Package:	18-SOIC
Package / Case:	18-SOIC (0.295", 7.50mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Oscillator Type:	External
Data Converters:	--
Voltage - Supply (Vcc/Vdd):	2.5 V ~ 6 V
RAM Size:	80 x 8
EEPROM Size:	--
Series:	PIC® 16C
Program Memory Size:	1.75KB (1K x 14)
Number of I/O:	13
Peripherals:	Brown-out Detect/Reset, POR, WDT
Connectivity:	--
Speed:	4MHz
Core Size:	8-Bit
Core Processor:	PIC
Part Status:	Active
Packaging:	Tube

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Embedded - Microcontrollers: PIC16LC621-04I/SO Application Field and Working Principle

The PIC16LC621-04I/SO is a low-cost, low-power, 8-bit microcontroller (MCU) from Microchip Technologies that is optimized for a wide range of general-purpose applications. It is equipped with 4K of program memory, 128K of data RAM, and 368 bytes of data EEPROM, making it exceptionally suitable for both small and large embedded tasks, such as lighting and HVAC control, motor control, and power metering. This MCU also features an enhanced 8-bit Central Processing Unit (CPU) that allows for easier implementation of addressing modes, a multitude of peripherals and communications options, and a wide range of intelligent analog peripherals, thereby making it suitable for a variety of embedded systems.

Applications

The PIC16LC621-04I/SO is primarily designed for general-purpose embedded applications. Due to its enhanced CPU and ample peripheral features, this MCU can easily handle tasks that involve collecting and transferring data from various external sensors, such as temperature and humidity, pressure, light, and sound. Additionally, this MCU features internal non-volatile memory, timers, advanced analog features, and suitable communication interfaces which make it suitable for a variety of applications, such as automation systems, industrial controls, access control devices, garage door openers, and lighting systems.

Pin Configuration

The PIC16LC621-04I/SO is an 8-pin MCU, with two power pins (VSS: ground and VDD/Vdd/VPP: power supply voltage), an input/output pin (GP0), a serial output (SO) pin, an externally-driven port (GP1) pin, and three control pins (MCLR: master clear, GP2: repeater control enable input, and OSC1/T1OSO: oscillator enable).

Memory

This MCU features 4K of program memory and 128K of data RAM, with 368 bytes of data EEPROM. The program memory contains an instruction set with an 8-bit Wide instruction word that allows for addresses to be properly used for direct jump and call operations, bit manipulation, immediate values, and register indirect. The data memory is organized as 128 bytes of RAM for instruction processing, 128 bytes of RAM for data, plus a significant portion dedicated to special function registers.

Interrupts

In addition to its improved CPU, this MCU also features two external interrupts – INT 0 and INT 1 – two programmable timer interrupts – TMR 0 and TMR 1 – and one combined timer/watchdog timer interrupt – TMR 0/WDT. The TMR 0 and TMR 1 interrupts feature individually programmable prescalers, enabling a wide range of interrupt rate programming.

I/O Features

The PIC16LC621-04I/SO features a wide range of I/O features, including 4 analog-to-digital converter inputs, 5 digital-to-analog converter outputs, and 12 input/output pins. These features enable a wide range of functions, such as analog-to-digital conversion, digital-to-analog conversion, Serial Communications Interface (SCI), Universal Asynchronous Receiver/Transmitter (UART), and frequency/pulse width modulation.The VDD/Vdd/VPP power pin controls the power supply to the MCU, enabling better power management for increased reliability and efficiency. Additionally, this MCU features a fast start-up time and utilizes a single-cycle architecture for faster execution of instructions.

Working Principle

The PIC16LC621-04I/SO microcontroller is based on an 8-bit RISC CPU core, with an instruction set optimized for low-power, low-cost embedded applications. This MCU implements an internal memory mapped program memory architecture, which allows for direct access to program memory locations without the need to go through memory-mapped input/output (I/O) ports.The working principle of this MCU is based on the execution of instructions stored in its internal program memory. These instructions are stored in a format that is defined by the instruction set architecture and allow the CPU core to carry out a set of operations. This MCU implements a single-cycle execution architecture, which enables faster execution of instruction, as well as low-power consumption.

Conclusion

The PIC16LC621-04I/SO is a low-cost, low-power 8-bit microcontroller optimized for a wide range of general-purpose applications. It features 4K of program memory, 128K of data RAM, and 368 bytes of data EEPROM, making it an exceedingly desirable solution for a variety of embedded tasks. The CPU core\'s enhanced 8-bit RISC architecture with improved addressing modes enables easier implementation of instructions, and its enhanced analog and communication peripherals provide user flexibility. Its intelligent peripherals, wide range of I/O features, and single-cycle architecture allow for faster processing, improved power management, and ultimately, better reliability.

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