Usart Registers Uart Mode | Texas Instruments MSP430x1xx instruction

USART Registers: UART Mode

13.3 USART Registers: UART Mode

Table 13−3 lists the registers for all devices implementing a USART module.

Table 13−4 applies only to devices with a second USART module, USART1.

Table 13−3.USART0 Control and Status Registers

Register	Short Form	Register Type	Address	Initial State
USART control register	U0CTL	Read/write	070h	001h with PUC
Transmit control register	U0TCTL	Read/write	071h	001h with PUC
Receive control register	U0RCTL	Read/write	072h	000h with PUC
Modulation control register	U0MCTL	Read/write	073h	Unchanged
Baud rate control register 0	U0BR0	Read/write	074h	Unchanged
Baud rate control register 1	U0BR1	Read/write	075h	Unchanged
Receive buffer register	U0RXBUF	Read	076h	Unchanged
Transmit buffer register	U0TXBUF	Read/write	077h	Unchanged
SFR module enable register 1†	ME1	Read/write	004h	000h with PUC
SFR interrupt enable register 1†	IE1	Read/write	000h	000h with PUC
SFR interrupt flag register 1†	IFG1	Read/write	002h	082h with PUC

†Does not apply to ’12xx devices. Refer to the register definitions for registers and bit positions for these devices.

Table 13−4.USART1 Control and Status Registers

Register	Short Form	Register Type	Address	Initial State
USART control register	U1CTL	Read/write	078h	001h with PUC
Transmit control register	U1TCTL	Read/write	079h	001h with PUC
Receive control register	U1RCTL	Read/write	07Ah	000h with PUC
Modulation control register	U1MCTL	Read/write	07Bh	Unchanged
Baud rate control register 0	U1BR0	Read/write	07Ch	Unchanged
Baud rate control register 1	U1BR1	Read/write	07Dh	Unchanged
Receive buffer register	U1RXBUF	Read	07Eh	Unchanged
Transmit buffer register	U1TXBUF	Read/write	07Fh	Unchanged
SFR module enable register 2	ME2	Read/write	005h	000h with PUC
SFR interrupt enable register 2	IE2	Read/write	001h	000h with PUC
SFR interrupt flag register 2	IFG2	Read/write	003h	020h with PUC

Note: Modifying SFR bits

To avoid modifying control bits of other modules, it is recommended to set or clear the IEx and IFGx bits using BIS.B or BIC.B instructions, rather than MOV.B or CLR.B instructions.

USART Peripheral Interface, UART Mode

13-21

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.

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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.

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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 Usart Registers Uart Mode, 3.USART0 Control and Status Registers

Models: MSP430x1xx

13.3 USART Registers: UART Mode

Table 13−3.USART0 Control and Status Registers

Register

Read/write

002h

082h with PUC

Table 13−4.USART1 Control and Status Registers

Register

MSP430x1xx specifications