Microcontroller
Peripheral Timing
Calculator

Calculators for Special Function Registers (SFR) of microcontrollers and stand-alone peripherals

Supporting 8051 and Philips XA derivatives: Timer, UART, I2C/IIC (Inter Integrated Circuit) and CAN (Controller Area Network)

Recommended books: Programming Embedded Systems The Art of Designing Embedded Systems The 8051 Microcontroller

We add new calculators to this web page all the time.
Check back regularly to see if your favorite microcontroller is supported!

8051 Derivatives

Generic

• Timer 0 and Timer 1

Philips 51LPC 87C768

• PWM (to SFR)
• PWM (from SFR)

Philips 89C51RX2

• UART (baud rate timing)

Philips 8xC591

• Watchdog
• UART (baud rate timing)
• I2C (bus timing)
• CAN (bus timing and acceptance filter setting)

Philips XA Derivatives

Generic

• Timer 0 and Timer 1

XA-C3

• CAN (bus timing and acceptance filter setting)

CAN - Controller Area Network

Includes bus timing and acceptance filter settings

• Worst case scenarios
• Philips SJA1000
• Philips 8xC591
• Philips XA-C3

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