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Silicon Laboratories, Inc. C8051F381

The Silicon Laboratories, Inc. C8051F381 is a High-speed 8051 MCU with up to 48 MIPS Throughput, 48MHz System Clock, with 64KBytes ISP Flash, 4KBytes XRAM, 256Bytes RAM, Up to 21 interrupts with two priority levels, 25 I/O Lines, 4 16-Bit Timer/Counters, 1 Watchdog Timer, 5-Channel PCA (with 5 Capture/Compare-Units), 21-Channel 10-bit SAR-ADC unit with up to 500 ksps, 1 USB 2.0 full speed unit with 1KByte FIFO, 2 Voltage comparators, 2-SMBusses, Enhanced SPI, 2 UARTs, On-Chip peripherals: temperature sensor, 48MHz oscillator, VDD monitor, Missing clock detector, and non-intrusive debug interface.

[Chip Vendor] [Distributors]

Development Tools
Compiler, Assembler, Linker, Debugger
Data Sheets
Data Sheet
1,674,548 bytes
Data Short
78,894 bytes
Errata Sheet
38,332 bytes
Silabs USB application note
1,618,676 bytes

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Header Files
Device Programmers
Real-Time OS
Simulated Features
Simulation for this device is provided by the default peripheral simulation driver.

Complete peripheral simulation is not available and is not planned to be implemented by ARM.

The following on-chip peripherals are not simulated.

  • Crossbar
  • External & On-Chip memory
  • Interrupts (Including External)
  • Port 0
  • Port 1
  • Port 2
  • Port 3
  • Power Saving Modes (Idle and Power Down)
  • Serial UART 0 (Enhanced Interface)
  • Timer 0
  • Timer 1
  • Timer 2
AGSI Drivers

The following AGSI Drivers are available for the Keil Software µVision Simulator.

AGDI Drivers

The following AGDI Drivers are available for the Keil Software µVision Debugger.

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