C8051F931-GM

Overview

The C8051F931-GM is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a high-speed CIP-51 core operating at up to 25 MHz. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device supports a supply voltage range of 0.9 V to 3.6 V, utilizing a built-in DC-DC converter for one-cell mode operation. Key peripherals include a 10-bit ADC with 23 external inputs, two comparators, multiple serial interfaces (SMBus, SPI, UART), and four general-purpose timers.

Feature Summary

• Integrated on-chip debug circuitry enables full-speed, non-intrusive in-system debugging without requiring external emulator hardware.
• Built-in DC-DC converter facilitates efficient power management by supporting single-cell battery operation down to 0.9 V.
• Hardware SmaRTClock oscillator provides low-power real-time clock functionality while consuming minimal supply current.
• High-speed 8051 core utilizes a pipelined architecture to execute a majority of instructions within one or two system clocks.

Applications

• Single-cell or dual-cell battery-powered portable electronic devices
• Low-power industrial monitoring systems requiring precise analog sensing
• Battery-operated consumer electronics with extended runtime requirements

Procurement Notes

Verify that the specific part number matches the required package variant, as the C8051F93x family includes both QFN and LQFP options. Confirm the suffix indicates the correct temperature grade and packaging style. Ensure compatibility with existing development tools, such as the ToolStick programming adapter, for production programming workflows.

Selection Notes

Select this component when a balance of processing speed and ultra-low power consumption is critical. The integrated DC-DC converter makes it suitable for applications powered by a single lithium cell. Consider the extensive analog peripheral set if signal conditioning and acquisition are required directly on the MCU.

Part Context

This device belongs to the C8051F9xx family of fully integrated mixed-signal microcontrollers. It shares architectural similarities with the C8051F930 but offers increased Flash capacity. The family is designed for applications demanding high performance in a compact footprint with robust analog capabilities.

Replacement Considerations

C8051F930-G-GMR

FAQ

How does the device support operation from a single battery cell?

The C8051F931-GM includes a built-in DC-DC converter that allows the microcontroller to operate efficiently in one-cell mode, supporting supply voltages from 0.9 V to 1.8 V.

What analog input capabilities are available?

The device features a 10-bit SAR ADC with up to 23 external inputs, a programmable gain amplifier, and an on-chip voltage reference for accurate signal measurement.