W79L658A25FL

Program Memory Size:	128KB (128K x 8)
Package / Case:	44-LCC (J-Lead)
Operating Temperature:	0°C ~ 70°C (TA)
Oscillator Type:	Internal
Data Converters:	A/D 8x10b
Voltage - Supply (Vcc/Vdd):	3 V ~ 4.5 V
RAM Size:	1.25K x 8
EEPROM Size:	--
Program Memory Type:	FLASH
Series:	W79
Number of I/O:	60
Peripherals:	POR, PWM, WDT
Connectivity:	EBI/EMI, I²C, UART/USART
Speed:	25MHz
Core Size:	8-Bit
Core Processor:	8051
Part Status:	Active
Packaging:	Tray

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Embedded - Microcontrollers

W79L658A25FL is a microcontroller introduced by Weltrend Semiconductor Inc., which is specially designed for embedded applications and rich integrated on-chip modules. It is made up of 8051-core based 8-bit MCU, providing excellent performance/cost ratio. With versatile in-system programmability, W79L658A25FL also incorporates high speed flash ROM, ROM/EPROM, SRAM and parallel I/O ports.

Application Field

W79L658A25FL is widely applied in different fields, such as:

• Industrial Control and Automation
• Home appliances
• Automobile Electronics
• Medical electronics
• Consumer electronics

In industrial control, W79L658A25FL is applied as the heartbeat of embedded systems in robot/CNC, material handling, security and safety systems. In home appliances, it is used in intelligent devices such as coffee machines, washing machines and kitchens. In automobile electronics, the microcontroller is employed for in car entertainment, Smartkey, alarm system, etc. Moreover, W79L658A25FL is also used in medical electronic products and consumer electronic products like Eletronic Dictionary, laptop and mobile phone etc.

Advantages of W79L658A25FL

W79L658A25FL is featured by excellent system performance, enhanced connectivity and extended cost efficiency. It provides multiple functions, excellent system performance and enhanced programmability and debug capability, including 8-bit 8051-core CPU, extended on-chip RAM up to 64K, a comprehensive set of peripherals and extended debug capability. W79L658A25FL also supports multiple configuration interfaces and has maximum data baud rate up to 12 Mbps. Furthermore, the microcontroller\'s crystal oscillator provides selectable frequencies such as 16MHz, 24MHz and 32MHz. It also provides a wide range of RAM and ROM/EPROM size up to 64K, which makes its applications become very flexible.

Working Principle

W79L658A25FL is an 8051 core based 8-bit MCU, which contains three components:

• CPU - Central Processing Unit
• Memory - Includes program RAM and data RAM
• Programmer - To encode instructions for the microcontroller

The demands from an application are translated in instructions, which is picked up from the program Microsoft or a similar software. This instructions are written in assembly language or C/C++, and these are what the programmer sends to the microcontroller for the specific application. The instructions are passed via a UART interface, USB or other connection options directly to the microcontroller.The microcontroller then decodes the instructions, working with the CPU, the memory and all the other parts of the controller to execute the instructions. This includes a reading of inputs, like switches and other sensors. Based on the instructions, it should also do some calculations, process the logic, and then control the actuators and other outputs.Finally, the microcontroller executes the instruction and completes the operation as per the logic given in it. After the microcontroller has completed its operation, it returns the status back to the programmer.

Conclusion

The W79L658A25FL is a comprehensive 8-bit 8051 core based microcontroller with high-level performance. It is suitable for industrial control and automation, home appliances, automobile electronics, medical electronics and consumer electronics application. W79L658A25FL microcontroller has excellent system performance and enhanced operational capabilities, making it one of the most powerful microcontroller for various applications.

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