C8051F411-GMR

Overview

The C8051F411-GMR is a fully mixed-signal System-on-a-Chip microcontroller from the C8051F41x family, manufactured by Silicon Labs. It features an 8051-compatible core operating at up to 50 MHz with pipelined architecture delivering 50 MIPS throughput. The device integrates 32 kB of in-system programmable Flash memory and 2304 bytes of internal data RAM. Analog peripherals include a 24-channel 12-bit ADC with ±1 LSB INL and two 12-bit current-mode DACs. Digital interfaces comprise SMBus, SPI, and UART ports alongside four general-purpose 16-bit timers and a Programmable Counter Array. The unit operates on a supply voltage range of 2.0 V to 5.25 V within an industrial temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated high-precision analog subsystem featuring a 24-channel 12-bit ADC with burst mode capability and dual 12-bit current-mode DACs for signal generation.
• On-chip debug circuitry enables full-speed, non-intrusive in-system debugging without external emulators, supporting breakpoints and register inspection.
• Hardware smaRTClock provides real-time clock functionality with battery-backed RAM and backup voltage regulator, allowing operation down to 1 V.
• Pipelined 8051 core executes instructions in one or two system clocks, offering expanded interrupt handling and crossbar logic for flexible peripheral pin mapping.

Applications

• Voice recording systems utilizing hardware accumulation and suspend modes for power efficiency
• Data acquisition systems requiring multi-channel analog input processing
• Industrial control applications needing precise timing and robust digital communication interfaces

Procurement Notes

Verify component status before procurement as this part is designated Not Recommended for New Designs (NRND). Confirm that existing designs can accommodate potential future obsolescence or supply constraints associated with legacy silicon families. Ensure compatibility with current firmware requirements given the specific memory and peripheral configuration of the C8051F411 variant.

Selection Notes

Select this component when a compact mixed-signal solution is required with extensive analog integration. The C8051F411 offers a balance of processing speed and analog precision suitable for sensor interfacing. Consider the 28-pin QFN package for space-constrained layouts. Evaluate the NRND status against long-term production lifecycle needs compared to newer Silicon Labs alternatives.

Part Context

This microcontroller belongs to the C8051F41x series, which Silicon Labs describes as highly analog-intensive small form factor devices. The family emphasizes standalone system-on-a-chip capabilities by integrating essential support circuits like power-on resets, watchdog timers, and clock oscillators directly onto the die alongside the CPU and I/O peripherals.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the C8051F411 is marked Not Recommended for New Designs, consult official Silicon Labs migration guides for compatible successors within the C8051F or EFM8 families.

FAQ

How does the C8051F411 handle low-power states?

The device supports Idle, Stop, and Suspend modes. The Suspend mode allows the MCU to sleep while retaining the ability to wake and respond to user input or interrupts without requiring a hardware reset, similar to traditional 8051 stop modes but with enhanced wake-up capabilities.

What are the specifications of the onboard ADC?

The integrated ADC is a 12-bit converter with up to 24 external inputs. It features programmable throughput up to 200 ksps, ±1 LSB Integral Non-Linearity (INL), no missing codes, and includes a built-in temperature sensor and data-dependent windowed interrupt generator.