Interrupt/General Control Register

3.4 Interrupt/General Control Register

The interrupt/general control (IntGenCtrl) is a 16-bit wide port-mapped register located at address 0x38. The primary component in the IntGenCtrl is the 8-bit interrupt mask register (IMR). The service branch enable status for each of the eight interrupts is registered in the IMR. A SET bit in the IMR enables that interrupt to assume the service branch (at the time that the associated trigger event occurs). A CLEAR bit disables the service branch for that interrupt. The IMR is located at bits 0 through 7 in the IntGenCtrl. Bit 0 is associated with INT0, which is the highest priority interrupt. Bit 7 is associated with INT7. Refer to Section 2.7, Interrupt Logic, for more information regarding the interrupt-system logic and initialization sequence.

IntGenCtrl register

address 0x38

(16-bit wide location)

low

high

priority

0x0000 : State after RESET low

Interrupt mask register

CE : Comparator enable

: port D5 falling-edge

AR : ARM bit

: port D4 rising-edge

PD : Pulse-density clock: PDMCD

: port D3 falling-edge

EP : Enable pullup resistors on port F

: port D2 rising-edge

: Enable TIMER2 (1 value starts timer)

: any port F falling-edge

: Enable TIMER 1 (1 value starts timer)

T2 : TIMER2 underflow

: Clock source for TIMER2 (0 chooses 1/2 MC)

T1 : TIMER1 underflow

: Clock source for TIMER1 (0 chooses 1/2 MC)

DA : DAC timer underflow

(1 value enables interrupt service)

The remaining bits in the IntGenCtrl have various control functions which are not directly related to the interrupt system. Four of these are related to the timer functions. Bits 8 and 9 are used to select the clock sources which govern the rates of TIMER1 and TIMER2. Clearing bit 8 chooses 1/2 MC as the source for TIMER1 (i.e., the TIMER runs at one-half the frequency of the Master Clock). Setting bit 8 chooses the oscillator reference (RTO or CRO) as the source for TIMER1. (The same applies for bit 9 and TIMER2.) Bits 10 and 11 in the IntGenCtrl are used to enable TIMER1 and TIMER2, respectively. Setting bit 10 starts TIMER1, and clearing bit 10 stops TIMER1. (The same applies for bit 11 and TIMER2).

Peripheral Functions

3-17

MSP50C614 specifications

The Texas Instruments MSP50C614 is a microcontroller that belongs to the MSP430 family, renowned for its low power consumption and versatile functionality. Primarily designed for embedded applications, this microcontroller is favored in various industries, including consumer electronics, industrial automation, and healthcare devices.

One of the standout features of the MSP50C614 is its ultra-low power technology, which enables it to operate in various power modes. This makes it ideal for battery-powered applications, where energy efficiency is crucial. The MSP430 architecture allows for a flexible power management system, ensuring that energy is conserved while providing robust performance.

The MSP50C614 is equipped with a 16-bit RISC CPU that delivers high performance while maintaining low power usage. With a maximum clock frequency of 16 MHz, it can execute most instructions in a single cycle, resulting in swift operation and responsive performance. This microcontroller also comes with a generous flash memory capacity, allowing developers to store large amounts of code and data conveniently.

In terms of peripherals, the MSP50C614 is highly versatile. It features a range of digital and analog input/output options, including multiple timers, GPIO ports, and various communication interfaces like UART, SPI, and I2C. This extensive set of peripherals allows for seamless integration with other components and simplifies the design of complex systems.

The integrated 12-bit Analog-to-Digital Converter (ADC) stands out as a valuable characteristic of the MSP50C614. This feature enables the microcontroller to convert physical analog signals into digital data, making it particularly useful for sensing applications and real-time monitoring.

Another noteworthy technology employed in the MSP50C614 is its support for low-voltage operations. With a broad supply voltage range, this microcontroller can function efficiently in diverse environments and is suitable for low-power applications, enhancing its practicality.

Moreover, Texas Instruments provides software support in the form of Code Composer Studio and various libraries that make it easier for developers to program and utilize the MSP50C614 effectively.

In summary, the Texas Instruments MSP50C614 microcontroller is a powerful, low-power solution equipped with the features and technologies necessary for efficient operation in a wide array of applications. Its blend of performance, flexibility, and energy efficiency makes it a popular choice among engineers and designers looking to create innovative, sustainable designs in the rapidly evolving tech landscape.

Texas Instruments MSP50C614 manual Interrupt/General Control Register, IntGenCtrl register

Models: MSP50C614