C8051F231

Overview

The C8051F231 is a mixed-signal System on a Chip MCU featuring an 8051-compatible core with 8 kB of ISP Flash memory and 256 bytes of internal data RAM. It operates within a supply voltage range of 2.7 to 3.6 V and supports frequencies up to 25 MHz, delivering 25 MIPS throughput. The device includes hardware UART and SPI interfaces, three 16-bit counter/timers, and a dedicated watchdog timer. It provides 22 general-purpose I/O pins in a 32-pin LQFP package.

Feature Summary

• Integrated JTAG debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Hardware-implemented UART and SPI serial interfaces for reliable communication protocols.
• On-chip VDD monitor and brown-out detector for system stability.
• Pipelined instruction architecture executing 70% of instructions in one or two system clocks.

Applications

• In-circuit programming and firmware updates via ISP Flash capabilities.
• Industrial control systems requiring robust digital I/O and serial communication.
• Sensor interface applications utilizing the onboard analog peripherals.
• Embedded systems needing low-power sleep and shutdown modes.

Procurement Notes

Verify the specific suffix (e.g., GQ) against the manufacturer's current datasheet to confirm package type and temperature rating. Ensure the ordering code matches the exact pin count and peripheral configuration required for your design. Cross-reference the revision number to guarantee compatibility with existing development tools and documentation.

Selection Notes

Select this model when 8 kB of Flash and 22 I/O pins are sufficient for the application. It is suitable for designs requiring hardware UART and SPI without bit-banging overhead. Consider alternative models in the F2xx family if additional RAM, higher ADC resolution, or different package options are needed. Verify that the 2.7-3.6 V operating range aligns with the target power supply.

Part Context

The C8051F231 belongs to the C8051F2xx family of fully integrated mixed-signal System on a Chip MCUs from Silicon Laboratories. This family shares a common CIP-51 microcontroller core and peripheral set, differing primarily in memory size, ADC resolution, and I/O pin counts. The series is designed for high-performance, cost-sensitive embedded applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Silicon Laboratories documentation for end-of-life notices or recommended replacements.

FAQ

Does the C8051F231 include an Analog-to-Digital Converter?

No, the C8051F231 model does not include an ADC. Other models in the F2xx family, such as the C8051F206 or C8051F220, feature 12-bit or 8-bit ADCs respectively.

What is the maximum clock frequency for the C8051F231?

The C8051F231 supports a maximum clock frequency of 25 MHz, which provides a throughput of 25 MIPS.