C8051F043

Overview

The C8051F043 is a mixed-signal System-on-Chip microcontroller featuring a high-speed pipelined 8051 core operating at up to 25 MHz with 25 MIPS throughput. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device includes a 10-bit SAR ADC with 13 external inputs, three analog comparators, and a precision voltage reference. Digital peripherals comprise a Bosch CAN controller, hardware SMBus, SPI, two UARTs, and multiple timer arrays. It supports 2.7 V to 3.6 V supply voltages and operates within the –40 °C to +85 °C temperature range.

Feature Summary

• Integrated on-chip JTAG debug circuitry enabling full-speed, non-intrusive in-circuit debugging with breakpoints and watchpoints.
• Mixed-signal architecture combining a high-performance 8051 core with extensive analog peripherals including a 10-bit ADC and programmable comparators.
• Comprehensive digital connectivity supporting concurrent operation of CAN, SMBus, SPI, and dual UART interfaces.
• In-system programmable Flash memory allowing sector-based updates without external programming equipment.

Applications

• Industrial control systems requiring robust communication via CAN and SMBus
• Data acquisition systems utilizing the integrated 10-bit ADC and temperature sensor
• Embedded applications needing real-time processing with on-chip debugging capabilities

Procurement Notes

Verify the specific package type (TQFP-64 or TQFP-100) and temperature grade against project requirements. Confirm that the 2.7 V to 3.6 V supply voltage range aligns with the target system power design. Ensure development tools support the CIP-51 core and on-chip JTAG interface for proper firmware deployment and debugging.

Selection Notes

Select this component when a complete mixed-signal solution is required to reduce bill-of-materials count. The C8051F043 is suitable for designs needing simultaneous analog conversion and digital communication. Consider the 64 kB Flash capacity for complex firmware storage needs. Evaluate the pin count availability in the chosen package against I/O requirements.

Part Context

This part belongs to the C8051F04x family of fully integrated mixed-signal System-on-Chip MCUs from Silicon Laboratories. The family shares a common CIP-51 core and peripheral set, differing primarily in Flash size, ADC resolution, and package options. The C8051F043 specifically offers 64 kB Flash and a 10-bit ADC, positioning it between higher-resolution and lower-memory variants in the series.

Replacement Considerations

Compatible substitutes within the same family include C8051F040, C8051F041, C8051F042, C8051F044, C8051F045, C8051F046, and C8051F047. Verify differences in ADC resolution (12-bit vs 10-bit), Flash capacity (32 kB vs 64 kB), and package pin counts before substitution.

FAQ

Does the C8051F043 include an 8-bit ADC?

No, the C8051F043 features a 10-bit SAR ADC. The 8-bit ADC is only available on the C8051F040, C8051F041, C8051F042, and C8051F043 models according to some sources, but the datasheet specifies the C8051F043 has a 10-bit ADC. Wait, the source says '8-Bit SAR ADC (C8051F040/1/2/3 Only)'. So yes, it does have both? No, the source lists '10 or 12-Bit SAR ADC' then '8-bit SAR ADC (C8051F040/1/2/3 Only)'. This implies C8051F043 has both? Let's re-read carefully. '10 or 12-Bit SAR ADC... 12-bit (C8051F040/1) or 10-bit (C8051F042/3/4/5/6/7)... 8-bit SAR ADC (C8051F040/1/2/3 Only)'. This suggests C8051F043 has a 10-bit ADC AND an 8-bit ADC. However, typically these are distinct modules. The question asks if it includes an 8-bit ADC. Based on the text '8-bit SAR ADC (C8051F040/1/2/3 Only)', the answer is Yes.

What is the maximum clock speed of the C8051F043?

The C8051F043 can operate with a system clock up to 25 MHz, providing up to 25 MIPS throughput.