C8051F2xx Small Form Factor Microcontrollers

The C8051F2xx is a family of fully integrated, mixed-signal System-on-a-Chip small form factor microcontrollers (MCUs) available with a true 12-bit (C8051F206) multi-channel ADC, 8-bit multi-channel ADC (C8051F220/221/226 and C8051F206) or without an ADC (C8051F230/231/236). Each model features an 8051-compatible microcontroller core with 8 kB of Flash memory. There are also UART and SPI serial interfaces implemented in hardware.
Products in this family feature 22 or 32 general purpose I/O pins, some of which can be used for assigned digital peripheral interface. Any of the pins may be configured for use as analog input to the analog-to-digital converter (C8051F220/221/226 and C8051F206 only). Other features include an on-board VDD monitor, WDT and clock oscillator. On-board Flash memory can be reprogrammed in-circuit, and may also be used for non-volatile data storage. Integrated peripherals can also individually shut down any or all of the peripherals to conserve power. All parts have 256 bytes of SRAM. An additional 1024 bytes of RAM is available in the C8051F206/226/236 devices.


  • Up to 25 MIPS
  • 8 kB Flash
  • 256 bytes internal RAM
  • 1024 bytes XRAM (F206/226/236 only)
  • 12-bit, 100 ksps, ±1 LSB INL (F206 only)
  • 8-bit, 100 ksps, ±1/4 LSB INL (F220/221/226)
  • 4 digital I/O, 5 V tolerant
  • 2.7 to 3.6 V supply
  • –40 to +85 °C
  • On-chip debug



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Data Sheet (1)

C8051F2xx Mixed-Signal 8 kB ISP Flash MCU Family
1.61099 kB

Data Short (7)

C8051F206 Data Short
1.10.20111/13/201186 kB
C8051F220 Data Short
6.15.2004441 kB
C8051F221 Data Short
1.10.20111/13/201184 kB
C8051F226 Data Short
6.15.2004443 kB
C8051F230 Data Short
6.15.2004425 kB
C8051F231 Data Short
1.10.20111/13/201177 kB
C8051F236 Data Short
6.15.2004426 kB

User Guides (5)

Quick Start Guide (1)

MCU Quick-Start Guide Featuring the USB Debug Adapter
0.51246 kB

Application Notes (27)

AN0822: Simplicity Studio User's Guide
0.12/12/20141412 kB
AN102: Configuring the Internal and External Oscillators
2.1385 kB
AN104: Integrating Keil 8051 Tools into the IDE
3.06/18/2013525 kB
AN105: Programming FLASH through the JTAG Interface
1.4706 kB
AN110: Implementing 16-bit PWM Using an On-Chip Timer
1.2246 kB
AN111: Using the C8051Fxxx in 5 Volt Systems
1.37/20/2013243 kB
AN114: Hand Soldering Tutorial for Fine Pitch QFP Devices
1.13034 kB
AN115: Software UART Examples
1.1406 kB
AN117: Using the C8051Fxxx On-Chip Interface Utilities DLL
3.37/19/2013268 kB
AN119: Calculating Settling Time for Switched Capacitor ADCs
1.27/19/2013301 kB
AN120: FLASH Security Users Guide
1.1174 kB
AN125: Integrating Raisonance 8051 Tools into the IDE
1.3162 kB
AN126: Integrating Tasking 8051 Tools into the Silicon Labs IDE
2.4207 kB
AN134: Multiple-Device JTAG Configuration in the IDE
1.2182 kB
AN136: Production Programming Options for MCU Devices
1.37/19/2013200 kB
AN140: Integrating HI-TECH 8051 Tools into the IDE
1.3207 kB
AN148: Magnetic Stripe Reader
1.38/12/20081674 kB
AN198: Integrating SDCC 8051 Tools into the Silicon Labs IDE
0.2224 kB
AN201: Writing to Flash from Firmware
0.77/19/2013201 kB
AN203: C8051Fxxx Printed Circuit Board Design Notes
0.27/19/2013314 kB
AN236: Integrating IAR 8051 Tools into the Silicon Laboratories IDE
0.3442 kB
AN324: Advanced Encryption Standard
0.1176 kB
AN533: Modular Bootloader Framework for Silicon Labs C8051Fxxx Microcontrollers
0.112/3/2010165 kB
AN568: EEPROM Emulations for Flash Microcontrollers
0.11/5/201158 kB
AN767: SMBus Bootloader
0.14/24/201397 kB
AN778: UART Bootloader
0.16/18/2013224 kB
AN798: EEPROM Emulation with Wear-Leveling for 8-Bit Flash MCUs
0.110/21/201361 kB

White Papers (5)

Miscellaneous (1)

C2 Specification
1.1273 kB

PCN (4)

Development Kits

Design Tools

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Software (33)

Interfacing an External SRAM to the C8051Fxxx
2 kB
16-bit PWM using an on-chip timer
1 kB
8 Bits Tools Installer
4.907/23/2014680562 kB
Advanced encryption standard
20 kB
AN767SW: SMBus Bootloader Software
4/25/2013252 kB
AN778 Software
6/21/2013448 kB
Configuration Wizard 2 Installer
4.4012/11/201316076 kB
Configuring the internal and external oscillators
7 kB
Configuring the Port I/O Crossbar Decoder
0 kB
EEPROM emulation for flash microcontrollers
16 kB
F850_BLDC_RD software kB
Flash programming via the C2 interface
97 kB
FLASHUtil Installer
4.407/23/20147754 kB
Hex to Svf conversion utility software
V 1.317/17/20123623 kB
IDE Installer
4.907/23/201425866 kB
Implementing a real-time clock
2 kB
Improving ADC resolution by oversampling and averaging
3 kB
Integrating Hi-Tech 8051 tools into the Silicon Labs IDE
1 kB
Integrating IAR 8051 tools into the Silicon Labs IDE
12 kB
Integrating SDCC 8051 tools into the Silicon Labs IDE
7 kB
Integrating Tasking 8051 tools into the Silicon Labs IDE
1 kB
IR Performance Analysis Tool
7641 kB
Low Pin-Count LCD Interface Software
4 kB
Modular bootloader framework for Silicon Labs MCUs
372 kB
Production Programmer
3.207/23/20142594 kB
Programming flash through the JTAG interface
23 kB
SMBus communication for small form factor devices
223 kB
Software UART examples
13 kB
Three-Channel Power Sequencer.
25 kB
ToolStick Development Tools
2.60.18/2/201345699 kB
USB Debug Adapter Reset Utility
1.76/1/201349 kB
uVision Driver
4.107/23/20144982 kB
Writing to flash from firmware
76 kB

Schematics/Layout (11)

Training (2)

Product Matrix
Part NumberMCU CoreMHzFlashRAMDig I/O PinsTimers (16-bit)PCA ChannelsInternal Osc.ADC 1ADC 2DACTemp SensorVREFComparatorsDebug InterfaceOtherPackage TypePackage SizeAlternativeDev KitAEC-Q100CommunicationsFootnotes
C8051F2068051258 kB1.25323±20%12-bit, 32-ch., 100 kspsNoNo2C2TQFP489x9 mmC8051F206DK
C8051F2208051258 kB0.25323±20%8-bit, 32-ch., 100 kspsNoNo2C2TQFP489x9 mmC8051F226DK
C8051F2218051258 kB0.25223±20%8-bit, 22-ch., 100 kspsNoNo2C2LQFP329x9 mmC8051F226DK
C8051F2268051258 kB1.25323±20%8-bit, 32-ch., 100 kspsNoNo2C2TQFP489x9 mmC8051F226DK
C8051F2308051258 kB0.25323±20%NoNo2C2TQFP489x9 mmC8051F226DK
C8051F2318051258 kB0.25223±20%NoNo2C2LQFP329x9 mmC8051F226DK
C8051F2368051258 kB1.25323±20%NoNo2C2TQFP489x9 mmC8051F226DK
    On-board JTAG debug support allows non-intrusive (uses no on-chip resources), full speed, in-circuit debug using the production MCU installed in the final application. This debug system supports inspection and modification of memory and registers, setting breakpoints, watchpoints, single stepping and run and halt commands. All analog and digital peripherals are fully functional when emulating using JTAG.
    Each MCU is specified for 2.7 to 3.6 V operation over the industrial temperature range (–45 to +85 °C) and is available in 48-pin TFQP and 32-pin LFQP packaging. The Port I/Os are tolerant for input signals up to 5 V.


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