UxCTL, Usart Control Register, I2C † | Texas Instruments MSP430x1xx

USART Registers: SPI Mode

UxCTL, USART Control Register

Unused

I2C†

CHAR

LISTEN

SYNC

SWRST

rw−0

rw−1

Unused	Bits	Unused
	7−6
I2C†	Bit 5	I2C mode enable. This bit selects I2C or SPI operation when SYNC = 1.
		0	SPI mode
		1	I2C mode
CHAR	Bit 4	Character length
		0	7-bit data
		1	8-bit data
LISTEN	Bit 3	Listen enable. The LISTEN bit selects the loopback mode
		0	Disabled
		1	Enabled. The transmit signal is internally fed back to the receiver
SYNC	Bit 2	Synchronous mode enable

0UART mode

1SPI mode

MMBit 1 Master mode

0USART is slave

1USART is master

SWRST	Bit 0	Software reset enable
		0	Disabled. USART reset released for operation
		1	Enabled. USART logic held in reset state

†Applies to USART0 on MSP430x15x and MSP430x16x devices only.

14-14USART Peripheral Interface, SPI Mode

MSP430x1xx specifications

The Texas Instruments MSP430x1xx series is a family of ultra-low-power microcontrollers that are highly regarded in the embedded systems community for their versatility and performance. Designed for applications ranging from portable instrumentation to low-power industrial devices, the MSP430x1xx combines flexibility and efficiency with advanced features tailored for energy-sensitive applications.

One of the standout characteristics of the MSP430x1xx is its ultra-low-power operation. This series offers several low-power modes that can significantly extend battery life in portable devices. The microcontroller can be in active mode, low-power mode, or even in a deep sleep state, allowing developers to optimize power consumption based on the application's requirements. In fact, some configurations can operate at just a few microamps, making it ideal for battery-operated devices.

Another key feature is the 16-bit RISC architecture that provides powerful processing capabilities while maintaining a low power profile. The MSP430x1xx series supports a maximum clock speed of 16 MHz, allowing for efficient task execution while consuming minimal energy. This architecture ensures that programs run smoothly while the microcontroller remains energy efficient.

The MSP430x1xx is equipped with various integrated peripherals, including analog-to-digital converters (ADCs), timers, and communication interfaces like UART, SPI, and I2C. The inclusion of a powerful ADC enables the microcontroller to handle sensor readings with high accuracy, making it suitable for applications like environmental monitoring and medical devices. The integrated timers provide essential functionality for real-time applications, allowing for event-driven programming and precise timing control.

Memory options in the MSP430x1xx series are also robust, with configurations offering flash memory sizes from 1 KB to 64 KB. This flexibility allows developers to choose the optimal memory size for their specific applications, accommodating a wide range of requirements.

Additionally, the MSP430x1xx microcontrollers are designed with a wide operating voltage range, typically from 1.8V to 3.6V, making them compatible with various power sources and further enhancing their usability in diverse applications.

In summary, the Texas Instruments MSP430x1xx series of microcontrollers is an excellent choice for developers seeking low-power, high-performance solutions for embedded applications. With an efficient architecture, a rich set of peripherals, and flexible memory options, these microcontrollers are positioned to meet the growing demands of modern electronic designs, particularly in battery-powered and energy-sensitive applications.

Texas Instruments MSP430x1xx manual UxCTL, Usart Control Register, I2C †

Models: MSP430x1xx

UxCTL, USART Control Register

Unused

I2C†

MSP430x1xx specifications