C8051F971-A-GM 8051 8-bit Microcontroller

The C8051F971-A-GM is an ultra-low power capacitive sensing MCU featuring a powerful 8051 core with 25 MHz performance.  This MCU provides the lowest power and highest sensitivity touch sensing solution for capacitive buttons, sliders, wheels and capacitive proximity sensing. With sub micro amp (<1 uA) wake on touch average current consumption, the C8051F971-A-GM achieves unparalleled touch sensitivity, speed and ultra-low power in a 5x5 mm, QFN32. Silicon Labs also offers demos, examples and Capacitive Sense Profiler within the Simplicity Studio to accelerate development of capacitive touch sensing solutions.

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Specifications Summary

MCU Core: 8051

MHz: 25

Flash (kB): 32

RAM (kB): 8

HS I²C Slave: 1

I²C: 1

SPI: 1


Dig I/O Pins: 28

ADC: 10-bit, 28-ch., 300 ksps


Comparators: 0

PCA Channels: 3

Timers: 4

Package Type: QFN32

Package Size (mm): 5x5

Development Tools Type
C8051F970DK C8051 MCU Development Kit Development Kits
Title Version Resource Type
IDE Installer 5.30 Software
Production Programmer 3.90 Software
FLASHUtil Installer 4.78 Software
Configuration Wizard 2 Installer 4.40 Software
uVision Driver 4.30 Software
KeilC51 Install 9.55 Software
RD-0039-0201 - ZigBee Capsense Dimmer Reference Design with EM3587, EFM8SB1 and PCB Antenna 2.1 Reference Designs
USB Debug Adapter Reset Utility 1.7 Software
ToolStick University DC Development Tools Software
ToolStick Development Tools 2.60.1 Software
Simplicity Studio Production Programmer 1.0 Software
Simplicity Studio v3, Mac Installer v3 Software
Simplicity Studio v3, Linux Installer v3 Software
Simplicity Studio v3 v3 Software
Simplicity Studio v4, Linux Installer v4.1.8 Software
Simplicity Studio v4, Mac Installer v4.1.8 Software
Simplicity Studio v4 (Windows) v4.1.8 Software
Simplicity Studio v4 (Windows64) v4.1.8 Software
Chip Scale Packages Wearables Technology White Papers
Low Power Design Basics: How to Choose the Optimal Low Power MCU for Your Embedded System White Paper White Papers
AN0822: Simplicity Studio™ User's Guide 0.5 Application Notes
AN1121: Headless Builds with Simplicity Studio v4 0.1 Application Notes
AN1160: Project Collaboration with Simplicity Studio 0.1 Application Notes
C8051F97x Data Sheet 1.1 Data Sheets
ToolStick Base Adapter User Guide 0.1 User Guides
C8051F970 DK Quick Start Guide 0.2 Quick Start Guides
PB #1701251: C8051F97x Datasheet Update Product Change Notifications (PCN)
AN447: Printed Circuit Design Notes for Capacitive Sensing with the CS0 Module 0.3 Application Notes
AN507: Low Power Capacitive Sensing 0.2 Application Notes
AN367: Understanding Capacitive Sensing Signal to Noise Ratios 0.4 Application Notes
C8051F970-DK User's Guide 0.1 User Guides
AN778 Software 0.2 Example Code
AN767SW: SMBus Bootloader Software Example Code
The C8051 Core: A Viable Compute Engine for 8-bit MCU Design 1.0 White Papers
How to Pick the Right Microcontroller Based on Low-Power Specifications 1.0 White Papers
Selecting the Optimal Battery for your Embedded Application 1.1 White Papers
克服智慧節點與物聯網的連接挑戰 1.0 White Papers
Die Wahl der optimalen Batterie für Ihr Embedded-System 1.0 White Papers
8 Bit Tools package, Release Notes 4.90 Software
QSG150: C8051Fxxx Development Kit Quick-Start Guide 0.6 Quick Start Guides
C8051Fxxx Dev Kit Quick Start Guide for Kits Featuring the USB Debug Adapter 0.5 Quick Start Guides
AN119: Calculating Settling Time for Switched Capacitor ADCs 1.3 Application Notes
AN124: Pin Sharing Techniques for the C2 Interface 1.4 Application Notes
AN0828: Capacitive Sensing Library Overview 0.3 Application Notes
AN0829: Capacitive Sensing Library Configuration Guide 0.2 Application Notes
8-Bit USB Debug Adapter User's Guide 0.3 User Guides
ToolStick Debug Adapter User Guide 0.1 User Guides
Si10xx Quick-Start Guide 0.2 Quick Start Guides
Si10xx Quick-Start Guide 0.1 Quick Start Guides
uVision Driver Rev History 4.30 Release Notes
ToolStick Dev Tools Release Notes 2.60.1 Release Notes
VCP Driver v6.7.3 Release Notes v6.7.3 Release Notes
IR Performance Analysis Tool Release Notes 1.11 Release Notes
USBXpress v6.7.3 Release Notes 6.7.3 Release Notes
Hex to Svf Release Notes 1.31 Release Notes
8051 Instruction Set Presentations
WMBUS Setup Software
AN111: Using the 8-Bit MCUs in 5 Volt Systems 1.4 Application Notes
AN1096: Simplicity Studio v4 Offline Installation 0.1 Application Notes
AN533: Modular Bootloader Framework for Silicon Labs C8051Fxxx Microcontrollers 0.1 Application Notes
AN203: 8-Bit MCU Printed Circuit Board Design Notes 0.3 Application Notes
AN236: Integrating IAR 8051 Tools into the Silicon Laboratories IDE 0.3 Application Notes
AN198: Integrating SDCC 8051 Tools into the Silicon Labs IDE 0.2 Application Notes
MCUniversity Course Lectures - Chinese 1 Miscellaneous
IEC-60730 Certificate Miscellaneous
MCUniversity Course Lectures 1 Miscellaneous
AN249: Human Interface Device Tutorial Example Code
AN141: SMBus Communication for Small Form Factor Devices Example Code
AN127: Flash Programming via the C2 Interface Example Code
Embedded programming Textbook 1 White Papers
CIP-51 Performance for Standard Library Math Routines 2.1 White Papers
Accuracy Considerations for Microcontroller-Based Temperature Sensors 1.0 White Papers
How to Overcome Technical Hurdles During Microcontroller Development 1.0 White Papers
EFM8 BRD5204A Reference Design Schematic Schematic and Layout Files
EFM8 BRD5204A Reference Design Bill of Materials Schematic and Layout Files
Production Programmer Release Notes 3.90 Release Notes
AN1121SW.zip 0.1 Example Code
PB #1606031: Inner Box Label Change Product Change Notifications (PCN)
Simplicity Studio v3, Offline Installer v3 Software
QuickSense Front Panel STB Software
AN136: Silicon Labs Production Programming Options 1.6 Application Notes
AN101: Configuring the Port I/O Crossbar Decoder Example Code
Interfacing an External SRAM to the C8051Fxxx Example Code
Configuring the internal and external oscillators Example Code
16-bit PWM using an on-chip timer Example Code
Implementing a real-time clock Example Code
Software UART examples Example Code
Integrating Hi-Tech 8051 tools into the Silicon Labs IDE Example Code
Integrating Tasking 8051 tools into the Silicon Labs IDE Example Code
Integrating SDCC 8051 tools into the Silicon Labs IDE Example Code
Integrating IAR 8051 tools into the Silicon Labs IDE Example Code
Improving ADC resolution by oversampling and averaging Example Code
Low Pin-Count LCD Interface Software Example Code
Writing to flash from firmware Example Code
Advanced encryption standard Example Code
Three-Channel Power Sequencer. Example Code
AN798: EEPROM Emulation with Wear-Leveling for 8-Bit Flash MCUs 0.1 Example Code
Modular bootloader framework for Silicon Labs MCUs Example Code
ToolStick Daughter Card Template Software
Standard Outerbox Label Change to Include RoHS and Halogen Free Mark Product Change Notifications (PCN)
Hex to Svf conversion utility software V 1.31 Software
AN568: EEPROM Emulation for Flash Microcontrollers 0.1 Application Notes
AN568: EEPROM Emulation for Flash Microcontrollers Example Code
Keil C51 Release Notes Release Notes
Simplicity Commander Release Notes 1.5.0 Software
Simplicity Commander -- Windows 1.5.0 Software
Simplicity Commander -- Mac 1.5.0 Software
Simplicity Commander -- Linux 1.5.0 Software
AN0823: Configuring Peripherals for 8-Bit Devices in Simplicity Studio 0.4 Application Notes
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