Texas Instruments MSP430x1xx manual

I2C Module Registers

U0CTL, USART0 Control Register-I2C Mode

RXDMAEN

TXDMAEN

I2C

LISTEN

SYNC

MST

I2CEN

rw−0

rw−1

RXDMAEN	Bit 7	Receive DMA enable. This bit enables the DMA controller to be used to
		transfer data from the I2C module after the I2C modules receives data. When
		RXDMAEN = 1, RXRDYIE is ignored.
		0	Disabled
		1	Enabled
TXDMAEN	Bit 6	Transmit DMA enable. This bit enables the DMA controller to be used to
		provide data to the I2C module for transmission. When TXDMAEN = 1,
		TXRDYIE, is ignored.
		0	Disabled
		1	Enabled
I2C	Bit 5	I2C mode enable. This bit select I2C or SPI operation when SYNC = 1.
		0	SPI mode
		1	I2C mode
XA	Bit 4	Extended Addressing
		0	7-bit addressing
		1	10-bit addressing
LISTEN	Bit 3	Listen. This bit selects loopback mode. LISTEN is only valid when MST = 1
		and I2CTRX = 1 (master transmitter).
		0	Normal mode
		1	SDA is internally fed back to the receiver (loopback).
SYNC	Bit 2	Synchronous mode enable
		0	UART mode
		1	SPI or I2C mode
MST	Bit 1	Master. This bit selects master or slave mode. The MST bit is automatically
		cleared when arbitration is lost or a STOP condition is generated.
		0	Slave mode
		1	Master mode
I2CEN	Bit 0	I2C enable. The bit enables or disables the I2C module. The initial condition
		for this bit is set, and SWRST function for UART or SPI. When the I2C and
		SYNC bits are first set after a PUC, this bit becomes I2CEN function and is
		automatically cleared.
		0	I2C operation is disabled
		1	I2C operation is enabled

USART Peripheral Interface, I2C Mode

15-21

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 U0CTL, USART0 Control Register-I2C Mode

Models: MSP430x1xx

U0CTL, USART0 Control Register-I2C Mode

MSP430x1xx specifications