C8051F808-GM

Overview

The C8051F808-GM is a mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F80x-83x family. It features an 8-bit 8051 core operating at up to 25 MHz, providing 25 MIPS throughput. The device includes 16 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC with up to 500 ksps sampling rate, a Capacitance to Digital Converter (CapSense), three 16-bit timers, and a Programmable Counter Array. Communication interfaces consist of hardware-enhanced UART, SMBus, and SPI. The unit operates on a supply voltage of 1.8 V to 3.6 V within a temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated Capacitance to Digital Converter supporting buttons, sliders, wheels, and capacitive proximity sensing with auto-scan capabilities.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• High-speed pipelined 8051 core architecture executing 70% of instructions in one or two system clocks.
• Versatile analog peripherals including a 10-bit ADC, programmable comparators, and built-in temperature sensor.

Applications

• Battery chargers
• Electronic toys and games
• Motor control systems
• Optical communications

Procurement Notes

Verify component status before procurement as this part is marked Not Recommended for New Designs. Confirm package type matches design requirements, as the C8051F808-GM specifically utilizes the QFN-20 package. Ensure development tools are compatible with the C2 interface for programming and debugging. Review the datasheet for any specific ordering suffix variations that may affect pinout or electrical characteristics.

Selection Notes

Select this MCU for applications requiring mixed-signal processing with integrated capacitive touch sensing. The high-speed 8051 core and extensive peripheral set suit complex control loops. Consider the limited I/O count and memory size against application demands. Evaluate power consumption profiles across different clock speeds and sleep modes. Verify compatibility with existing firmware architectures targeting the CIP-51 instruction set.

Part Context

This component belongs to the C8051F80x-83x series of mixed-signal microcontrollers. The family shares common architectural features but varies in memory size and peripheral configurations. The C8051F808 variant specifically offers 16 kB Flash and 512 bytes RAM. It is designed for cost-sensitive embedded applications requiring robust analog capabilities and digital control.

Replacement Considerations

Consult the manufacturer's product selection guide for direct functional equivalents within the same family. Cross-reference pinouts and register maps when migrating to newer or alternative silicon. Verify that replacement parts support the required communication protocols and analog peripheral counts.

FAQ

What is the maximum sampling rate of the ADC?

The 10-bit ADC supports a maximum sampling rate of up to 500 ksps.

Does the device support capacitive touch sensing?

Yes, it includes a Capacitance to Digital Converter (CapSense) that supports buttons, sliders, wheels, and capacitive proximity sensing.

How is in-system programming handled?

The Flash memory is in-system programmable in 512-byte sectors using the C2 interface.