C8051F812-GMR

Overview

The C8051F812-GMR is an 8-bit mixed-signal ISP Flash MCU from the C8051F80x-83x family, manufactured by Silicon Labs. It features a high-speed CIP-51 core operating at up to 25 MHz with 25 MIPS throughput. The device includes 8 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC supporting up to 500 ksps, a capacitance-to-digital converter for capacitive sensing, and digital interfaces such as UART, SMBus, and SPI. It operates on a supply voltage range of 1.8 V to 3.6 V and is available in a QFN-20 package.

Feature Summary

• Integrated capacitance-to-digital converter supports buttons, sliders, wheels, and proximity sensing with fast conversion times and auto-scan capabilities.
• On-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• Pipelined instruction architecture executes a majority of instructions in one or two system clocks for efficient processing.
• Built-in voltage supply monitor and multiple reset sources ensure reliable operation under varying power conditions.

Applications

• Capacitive touch sensing interfaces including buttons and sliders
• Portable battery-powered devices requiring low voltage operation
• Industrial control systems utilizing analog signal acquisition
• Embedded applications needing in-system programming capabilities

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official documentation. Check for obsolescence notices as this family may be marked not recommended for new designs. Ensure packaging specifications match project requirements before finalizing orders.

Selection Notes

Select this MCU for applications requiring integrated capacitive sensing alongside standard analog-to-digital conversion. Consider the 25 MHz clock speed and memory size relative to code complexity. Evaluate the QFN-20 package constraints against PCB layout limitations. Verify that the 1.8 V to 3.6 V supply range aligns with the target system power architecture.

Part Context

This component belongs to the C8051F80x-83x mixed-signal ISP Flash MCU family. It shares architectural similarities with other members like the C8051F800 and C8051F818 but differs in specific peripheral configurations and memory sizes. The family emphasizes ease of development through comprehensive on-chip debug resources.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.