C8051F930-G-GMR

Overview

The C8051F930-G-GMR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, housed in a 32-QFN (5x5 mm) package. It features a high-speed pipelined 8051 core operating at up to 25 MHz with 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 SAR ADC with 23 external inputs, two comparators, four general-purpose timers, a Programmable Counter Array, and multiple serial communication interfaces including SMBus, SPI, and UART.

Feature Summary

• Integrated on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Built-in DC-DC converter and LDO regulator allowing flexible power management across single or dual battery configurations.
• Hardware SmaRTClock oscillator providing real-time clock functionality with ultra-low power consumption down to 0.9 V.
• Crossbar architecture allowing dynamic assignment of digital I/O pins to peripheral functions.

Applications

• Single-cell or dual-cell battery-powered embedded systems
• Industrial control applications requiring low-power operation
• Portable instrumentation and smart sensor nodes

Procurement Notes

Verify that the specific suffix GMR corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component meets RoHS3 compliance standards as indicated in official documentation. Ensure that the operating temperature range of -40°C to +85°C aligns with the environmental requirements of the target application before finalizing procurement orders.

Selection Notes

Select this component when a fully static 8051 architecture with mixed-signal capabilities is required for cost-sensitive designs. The inclusion of a 10-bit ADC and hardware comparators makes it suitable for analog signal conditioning tasks. Consider the 25 MHz throughput if instruction execution speed is critical, while noting that the device is marked as not recommended for new designs by the manufacturer.

Part Context

This part belongs to the C8051F9xx family of mixed-signal microcontrollers designed for low-voltage applications. The 'G' suffix typically denotes the industrial temperature grade, while 'GMR' specifies the reel packaging variant. The device integrates significant analog peripherals alongside the standard digital 8051 core, distinguishing it from purely digital MCU offerings in the broader portfolio.

Replacement Considerations

Silicon Laboratories explicitly marks the C8051F93x-C8051F92x series as Not Recommended for New Designs. Engineers should evaluate newer EFM8 or C8051T series alternatives for long-term supply stability and updated feature sets before committing to this legacy platform.

FAQ

How does the built-in DC-DC converter affect power consumption?

The integrated DC-DC converter allows the device to operate efficiently in one-cell mode (0.9 V to 1.8 V) by stepping up the supply voltage, significantly reducing current draw compared to using only an LDO regulator in low-voltage scenarios.

What is the maximum sampling rate of the onboard ADC?

The 10-bit SAR ADC supports a programmable throughput of up to 300 ksps, which can be further enhanced by the 16-bit Auto-Averaging Accumulator in burst mode for increased resolution.