MSP430 UART Register Calculator

Enter value and click on calculate. Result will be displayed.

Universal Asynchronous Receiver/Transmitter Clock:

KHz

Baud Rate:

KHz

Number of bits:

(<13)

Modulation Register:

Baud Rate (LSW):

Baud Rate (MSW):

Bit Error Percent:

	TX	RX
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12

The MSP430 UART Register Calculator is a tool designed to help configure the UART (Universal Asynchronous Receiver/Transmitter) communication settings on MSP430 microcontrollers — a family of low-power microcontrollers from Texas Instruments.

The MSP430's UART module (often called USCI or eUSCI depending on the model) requires specific register settings to establish serial communication, and calculating these values manually can be tricky. The calculator simplifies this process by determining the correct values for the UART control registers based on user-defined parameters like:

Baud rate: The speed of serial communication (e.g., 9600, 115200 bps).
Clock source frequency: The frequency of the clock driving the UART module.
Oversampling mode: Whether the UART uses standard or oversampling mode.
Parity, stop bits, and data length: UART frame configuration options.
The calculator outputs values for key registers like:

UCAxBR0 and UCAxBR1: Baud rate control registers.
UCAxMCTLW: Modulation control for oversampling and baud rate fine-tuning.
UCAxCTLW0: Control register for enabling/disabling UART, setting parity, stop bits, and data length.
Why use the MSP430 UART Register Calculator?

Saves time: Avoids manual calculation of complex register values.
Reduces errors: Ensures accurate configuration, especially for uncommon baud rates or clock sources.
Optimizes performance: Helps achieve the most accurate baud rate and stable communication.