MSP430F2012IN datasheet(13/91 Pages) TI

13 / 91 page

MSP430F20x3

MSP430F20x2

MSP430F20x1

www.ti.com

SLAS491G

– AUGUST 2005 – REVISED APRIL 2011

Interrupt Vector Addresses

The interrupt vectors and the power-up starting address are located in the address range of 0FFFFh to 0FFC0h.

The vector contains the 16-bit address of the appropriate interrupt handler instruction sequence.

If the reset vector (located at address 0FFFEh) contains 0FFFFh (for example, flash is not programmed) the

CPU goes into LPM4 immediately after power-up.

Table 7. Interrupt Sources

SYSTEM

INTERRUPT SOURCE

INTERRUPT FLAG

WORD ADDRESS

PRIORITY

INTERRUPT

Power-up

PORIFG

External reset

RSTIFG

Watchdog Timer+

WDTIFG

Reset

0FFFEh

31, highest

Flash key violation

KEYV

PC out-of-range(1)

See (2)

NMI

NMIIFG

(non)-maskable,

Oscillator fault

OFIFG

(non)-maskable,

0FFFCh

Flash memory access violation

ACCVIFG(2)(3)

(non)-maskable

0FFFAh

0FFF8h

Comparator_A+ (MSP430F20x1)

CAIFG(4)

maskable

0FFF6h

Watchdog Timer+

WDTIFG

maskable

0FFF4h

Timer_A2

TACCR0 CCIFG(4)

maskable

0FFF2h

Timer_A2

TACCR1 CCIFG.TAIFG(2)(4)

maskable

0FFF0h

0FFEEh

0FFECh

ADC10 (MSP430F20x2)

ADC10IFG(4)

maskable

0FFEAh

SD16CCTL0 SD16OVIFG,

SD16_A (MSP430F20x3)

maskable

SD16CCTL0 SD16IFG(2)(4)

USI

USIIFG, USISTTIFG(2)(4)

maskable

0FFE8h

(MSP430F20x2, MSP430F20x3)

I/O Port P2 (two flags)

P2IFG.6 to P2IFG.7(2)(4)

maskable

0FFE6h

I/O Port P1 (eight flags)

P1IFG.0 to P1IFG.7(2)(4)

maskable

0FFE4h

0FFE2h

0FFE0h

See (5)

0FFDEh to 0FFC0h

15 to 0, lowest

(1)

A reset is generated if the CPU tries to fetch instructions from within the module register memory address range (0h to 01FFh) or from

within unused address ranges.

(2)

Multiple source flags

(3)

(non)-maskable: the individual interrupt-enable bit can disable an interrupt event, but the general interrupt enable cannot.

(4)

Interrupt flags are located in the module.

(5)

The interrupt vectors at addresses 0FFDEh to 0FFC0h are not used in this device and can be used for regular program code if

necessary.

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