PIC16C621-20E/SS

Program Memory Type:	OTP
Base Part Number:	PIC16C621
Supplier Device Package:	20-SSOP
Package / Case:	20-SSOP (0.209", 5.30mm Width)
Operating Temperature:	-40°C ~ 125°C (TA)
Oscillator Type:	External
Data Converters:	--
Voltage - Supply (Vcc/Vdd):	3 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:	20MHz
Core Size:	8-Bit
Core Processor:	PIC
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The PIC16C621-20E/SS is an 8-bit microcontroller manufactured by Microchip Technology. It is one the most popular among the family of PIC microcontrollers in terms of cost, features, and performance. This microcontroller is mainly used for system control and automation such as motor control, home automation, and industrial control applications. It is often used in wearable devices and other small embedded applications due to its small package size.

Application Fields

The PIC16C621-20E/SS microcontroller has a wide range of applications in embedded systems. It is often used in motor control applications, such as controlling stepper motors, and can also be used for controlling points such as servo motors, DC motors, and AC motors. The PIC16C621-20E/SS can also be used in home automation systems due to its low power consumption, small size, and high performance. Home automation systems often use the PIC16C621-20E/SS to control lights, temperature, and other home appliances. It can also be used in industrial control applications, such as controlling production machinery.

Architecture

The PIC16C621-20E/SS microcontroller has a Harvard architecture, meaning that it uses separate buses for instruction and data. This allows for the simultaneous execution of code and data. The PIC16C621-20E/SS has a 16-bit instruction set, with 32 instructions and 65 bytes of RAM. It also has two 16-bit Timer/Counter modules, two 8-bit I/O ports, and an 8-bit A/D converter. The microcontroller has an operating voltage of 2.0V – 5.5V and a temperature range of -40°C to 85°C. It features a small 14-pin PDIP package which allows for easy implementation in large and small embedded systems.

Memory Organization

The PIC16C621-20E/SS has an elfa-byte instruction and data memory. The instruction memory can store up to 1024 instructions, divided into 8-bit bytes. The data memory can store up to 256 bytes of data, which can be used to store variables, constants, and lookup tables. The data memory is divided into two banks, each of which has 128 bytes. The first bank is the user bank, while the second bank is the kernel bank. The kernel bank is used by the firmware to store and execute code, while the user bank can be used by the program to store data.

Peripherals

The PIC16C621-20E/SS microcontroller has various peripherals that can be used to control external devices and communicate with other systems. It has two 16-bit Timer/Counter modules which can be used to measure time periods and generate PWM signals. It also has an 8-bit I/O port and an 8-bit A/D converter, which can be used for sensing analog values. It also features an EEPROM which can store up to 128 bytes of non-volatile data, and an SPI interface which can be used to communicate with other devices.

Working Principle

The PIC16C621-20E/SS microcontroller operates on its own embedded processor, called the Harvard Architecture RISC-like processor. It contains the registers, ALU (Arithmetic Logic Unit), I/O logic, interrupt logic, memory management logic, clock, power supply, and timer hardware. The Harvard Architecture processor has three main parts: the CPU, the micro-program, and the instruction set. The CPU contains the ALU and the registers and is responsible for executing instructions. The micro-program is a series of control signals that are used to control the CPU and the peripheral devices. The instruction set contains the instructions used to program the microcontroller. The PIC16C621-20E/SS microcontroller can be programmed in either assembly language or C language. Assembly language is used to directly manipulate the registers and memory contents, while C language is used to write structured, more readable, and more maintainable code. The microcontroller is programmed by writing the code to the micro-program, and then using the instruction set to load the micro-program into the program memory of the microcontroller. Once the program is loaded, the microcontroller can begin executing instructions.

Conclusion

The PIC16C621-20E/SS microcontroller is a low-cost, low-power, high-performance 8-bit microcontroller manufactured by Microchip Technology. Its small 14-pin PDIP package makes it ideal for small embedded systems, while its Harvard architecture allows it to simultaneously execute code and data. The PIC16C621-20E/SS has a wide range of applications in motor control, home automation, and industrial control systems. It can be programmed in both assembly language and C language, and its various peripherals allow it to control external devices and communicate with other systems.

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