C8051F066

Overview

The C8051F066 is a mixed-signal System-on-a-Chip microcontroller from Silicon Labs, featuring a high-speed 8051 core operating at up to 25 MHz. It integrates 32 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device includes two 16-bit SAR ADCs capable of 1 Msps throughput, a 10-bit SAR ADC, two 12-bit DACs, three analog comparators, and a precision voltage reference. Digital peripherals consist of 59 general-purpose I/O pins, hardware SMBus, SPI, dual UARTs, five 16-bit timers, and a Programmable Counter Array. It supports an external memory interface and operates within a supply voltage range of 2.7 V to 3.6 V across the -40 °C to +85 °C temperature range.

Feature Summary

• Features two separate 16-bit high-speed SAR ADCs with direct memory access for efficient data handling without software overhead.
• Includes on-chip JTAG debug circuitry enabling full-speed, non-intrusive in-circuit debugging with breakpoints and stack monitoring.
• Provides flexible digital peripheral configuration via a programmable digital crossbar allowing user-defined pin assignments.
• Supports in-system programming of Flash memory in 512-byte sectors for field upgrades and non-volatile data storage.

Applications

• Analog-intensive signal processing systems requiring high-resolution data acquisition
• Industrial control applications utilizing CAN or serial communication interfaces
• Portable instrumentation and battery-powered devices due to low power modes
• Embedded systems requiring precise waveform generation via synchronized DAC outputs

Procurement Notes

Verify the specific package variant and ordering suffix against the manufacturer's current datasheet before procurement. Confirm that the required Flash size (32 kB) meets application needs, as other family members offer different capacities. Ensure development tools such as the Keil PK51 kit or Silicon Labs IDE are compatible with the selected revision. Check RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select the C8051F066 when the application requires two independent 16-bit ADCs with DMA support alongside standard 8051 compatibility. This model is suitable for designs needing 59 GPIOs and an external memory interface. Consider alternative models like the C8051F060 if CAN bus connectivity is necessary, as this feature is absent in the F066. Evaluate power consumption requirements against the available sleep and shutdown modes.

Part Context

The C8051F066 belongs to the C8051F06x family of highly integrated mixed-signal microcontrollers produced by Silicon Labs. These devices utilize the CIP-51 core, which offers improved instruction throughput compared to traditional 8051 architectures. The family is designed to reduce system component count by integrating extensive analog and digital peripherals onto a single chip, facilitating compact and cost-effective embedded solutions.

Replacement Considerations

Direct replacements within the same family include the C8051F060, C8051F062, and C8051F064, which share similar pinouts and core features but may differ in Flash capacity or peripheral availability such as CAN controllers. Verify pin compatibility and peripheral mapping before substitution.

FAQ

Does the C8051F066 include a Controller Area Network (CAN) interface?

No, the C8051F066 does not integrate a CAN controller. This peripheral is available only in the C8051F060/1/2/3 variants of the family.

What is the maximum sampling rate of the 16-bit ADCs?

The two 16-bit SAR ADCs can operate at a programmable throughput of up to 1 Msps.

Can the Flash memory be updated in the field?

Yes, the 32 kB Flash memory is in-system programmable in 512-byte sectors, allowing for field upgrades and non-volatile data storage.