The Texas Instruments MSP430x2xxx Users Guide (Literature Number SLAU144J Revise

Question

The Texas Instruments MSP430x2xxx Users Guide (Literature Number SLAU144J Revised July 2013) indicates, on page 37, that the interrupt vector table contains an interrupt vector (a 16-bit value) for Watchdog Timer events in the two bytes which can be read beginning at memory location 0xFFF4.

(a) If the content of these two bytes beginning at 0xFFF4 is 0x92 and then 0xC6 (at address 0xFFF5), what is the interrupt vector value?

(b) Knowing that an “interrupt vector” is just the address of the start of a function which should know how to deal with that kind of interrupt, what kind of memory block (RAM/FLASH/Peripheral Register) is your answer pointing to if the precise device in use is an MSP430G2553?

Explanation / Answer

a) 0xC692 is the vector value that is read from vector address and gets loaded into PC

b) Flash Memory is used for the purpose by MSP430G2553

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