Texas Instruments MSP430x1xx manual I2CDCTL, I2C Data Control Register, Unused

Models: MSP430x1xx

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I2C Module Registers

I2CDCTL, I2C Data Control Register

7

6

5

4

3

2

1

0

Unused

Unused

I2CBUSY

I2C

SCLLOW

I2CSBD

I2CTXUDF

I2CRXOVR

I2CBB

r0

r0

r−0

r−0

r−0

r−0

r−0

r−0

Unused

Bits

Unused. Always read as 0.

 

7−6

 

 

I2CBUSY

Bit 5

I2C busy

 

 

0

I2C module is idle

 

 

1

I2C module is not idle

I2C

Bit 4

I2C SCL low. This bit indicates if a slave is holding the SCL line low while the

SCLLOW

 

MSP430 is the master and is unused in slave mode.

 

 

0

SCL is not being held low

 

 

1

SCL is being held low

I2CSBD

Bit 3

I2C single byte data. This bit indicates if the receive register I2CDRW holds

 

 

a word or a byte. I2CSBD is valid only when I2CWORD = 1.

 

 

0

A complete word was received

 

 

1

Only the lower byte in I2CDR is valid

I2CTXUDF

Bit 2

I2C transmit underflow

 

 

0

No underflow occurred

 

 

1

Transmit underflow occurred

I2CRXOVR

Bit 1

I2C receive overrun

 

 

0

No receive overrun occurred

 

 

1

Receiver overrun occurred

I2CBB

Bit 0

I2C bus busy bit. A START condition sets I2CBB to 1. I2CBB is reset by a

 

 

STOP condition or when I2CEN=0.

 

 

0

I2C bus not busy

 

 

1

I2C bus busy

USART Peripheral Interface, I2C Mode

15-23

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Texas Instruments MSP430x1xx manual I2CDCTL, I2C Data Control Register, Unused

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.