W79E227ALG

Microcontrollers Overview

The W79E227ALG is an 8-bit microcontroller based on the 4T-8051 architecture, operating at frequencies up to 40MHz. It features 64KB of in-system programmable Flash EPROM and a 4KB auxiliary loader Flash. Data memory includes 256 bytes of scratch-pad RAM, 2KB of auxiliary RAM, and 2KB of NVM Data Flash. The device supports multiple I/O ports, three 16-bit timers, a Motion Feedback Module with QEI, eight 12-bit PWM channels, and an 8-channel 10-bit ADC.

Microcontrollers Feature Summary

• High-performance 4T-8051 core delivering up to 2.5 times better throughput than traditional 8051 designs.
• Integrated Motion Feedback Module supporting Quadrature Encoder Interface (QEI) and input capture for motor control.
• Eight-channel 12-bit PWM outputs with complementary paired modes, programmable dead-time insertion, and output override.
• Flexible memory architecture with separate main Flash, auxiliary loader Flash, and non-volatile data storage.

Microcontrollers Applications

• Brushless DC (BLDC) motor control systems
• Motion feedback and encoder interface applications
• Industrial automation controllers

Microcontrollers Procurement Notes

Verify the specific package type and lead-free status against the manufacturer's current documentation. Confirm that the ordering suffix corresponds to the LQFP-48 pin configuration. Ensure compatibility with existing design constraints regarding voltage levels and interrupt priorities before finalizing procurement.

Microcontrollers Selection Notes

Select this component when high-speed 8051 performance combined with advanced motion control peripherals is required. The inclusion of dedicated QEI and multi-channel PWM hardware makes it suitable for complex motor drive applications without requiring external logic.

Microcontrollers Part Context

This part belongs to the W79E22X series, which shares architectural similarities with the W79E225A and W79E226A models. The primary distinction lies in the program memory size, with the W79E227 variant offering 64KB of Flash compared to smaller capacities in other series members.

Microcontrollers Replacement Considerations

W79E226ALG

Microcontrollers FAQ

What is the maximum operating frequency of the W79E227ALG?

The device supports operating frequencies up to 40MHz.

Does the W79E227ALG support external memory expansion?

Yes, the datasheet indicates support for external memory access via Port 0 and Port 2 address/data buses.