What is the address of reset interrupt vector in MSP430?

What is the address of reset interrupt vector in MSP430?

The most important interrupt vector is the reset vector, which holds the starting address of the program running on power-up. The reset vector is stored at 0xFFFE and 0xFFFF .

What is interrupt MSP430?

Interrupts are generally any trigger that causes the CPU to deviate from executing instructions in the order set by the instructions. When an interrupt occurs, the CPU of the MSP430 saves its current state and goes to handle the interrupt handler if one exists.

Which is non maskable interrupt?

In computing, a non-maskable interrupt (NMI) is a hardware interrupt that standard interrupt-masking techniques in the system cannot ignore. Such uses include reporting non-recoverable hardware errors, system debugging and profiling, and handling of special cases like system resets.

Which interrupt source has the highest priority and lowest priority in MSP430 microcontroller?

MSP430 checks for the fired interrupts and selects the highest priority that is not masked. The current state of the MSP430 need to be stored before it jumps go handle an interrupt so the processor can return successfully: The Program Counter (PC) holds the address of the next instruction to be executed.

How large of a memory can be connected to MSP430?

The MSP430 does not have an external memory bus, so it is limited to on-chip memory, up to 512 KB flash memory and 66 KB random-access memory (RAM), which may be too small for applications needing large buffers or data tables.

How many interrupts are allocated in 8051 including reset interrupt?

8051 architecture handles 5 interrupt sources, out of which two are internal (Timer Interrupts), two are external and one is a serial interrupt. Each of these interrupts has its interrupt vector address. The highest priority interrupt is the Reset, with vector address 0x0000.

What needs to be controlled to disable interrupts for an MSP430 microcontroller?

Depending on your MSP there might not be too many registers you will need to check to disable interrupts. Mainly you will need to check IE1, IE2, P1IE, P2IE, timer control registers etc.

How many low power modes are used in MSP430?

5 low power modes
MSP430 has 5 low power modes named as LPM0 to LPM4 .

What is maskable?

Maskable interrupt is a hardware Interrupt that can be disabled or ignored by the instructions of CPU. A non-maskable interrupt is a hardware interrupt that cannot be disabled or ignored by the instructions of CPU. 2. When maskable interrupt occur, it can be handled after executing the current instruction.

What is NMI in arm?

Posted by Erich Styger. The NMI is a special interrupt on ARM Cortex-M architecture: as the name indicates, it cannot be ‘masked’ by the usual ‘disable interrupts’ flags (PRIMASK, BASEPRI), similar to the Reset signal.

Which are the low power operating modes of MSP430?

Low power modes

• LPM0 – The CPU is disabled.
• LPM1 – The loop control for the fast clock (MCLK) is also disabled.
• LPM2 – The fast clock (MCLK) is also disabled.
• LPM3 – The DCO oscillator and its DC generator are also disabled.
• LPM4 – The crystal oscillator is also disabled.

Is MSP430 ARM based?

The MSP430 MCU just gained an ARM-based cousin, the M4-based MSP432.