Oscillator Fault Detection

Basic Clock Module Operation

Signal XT_OscFault triggers the OFIFG flag as shown in Figure 4−10. The

LFXT1_OscFault signal is low when LFXT1 is in LF mode.

On devices without XT2, the OFIFG flag cannot be cleared when LFXT1 is in LF mode. MCLK may be sourced by LFXT1CLK in LF mode by setting the SELMx bits, even though OFIFG remains set.

On devices with XT2, the OFIFG flag can be cleared by software when LFXT1 is in LF mode and it remains cleared. MCLK may be sourced by LFXT1CLK in LF mode regardless of the state of the OFIFG flag.

Figure 4−10. Oscillator-Fault-Interrupt

XT1off

LFXT1_OscFault

POR

Oscillator Fault Interrupt Request

XT_OscFault

XT2off

XT2_OscFault

XT2

IFG1.1

IE1.1

Clear

OFIFG

OFIE

OF_IRQ_NMI

XTS

SELM1

SELM0

DCOR

PUC IRQA

Oscillator Fault Fail-Safe Logic

XSELM1

Fault_from

XT2

Fault_from

XT1

XDCOR

XT2 Is an internal signal. XT2 = 0 on devices without XT2 (MSP430x11xx and MSP430x12xx). XT2 = 1 on devices with XT2 (MSP430F13x, MSP430F14x, MSP430F15x, and(MSP430F16x) IRQA: Interrupt request accepted

LFXT1_OscFault: Only applicable to LFXT1 oscillator in HF mode.

Basic Clock Module

4-11

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 Oscillator Fault Detection, 10. Oscillator-Fault-Interrupt

Models: MSP430x1xx