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MSP430F2121IRGE Datasheet(PDF) 6 Page - Texas Instruments |
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MSP430F2121IRGE Datasheet(HTML) 6 Page - Texas Instruments |
6 / 62 page MSP430x21x1 MIXED SIGNAL MICROCONTROLLER SLAS439C − SEPTEMBER 2004 − REVISED JULY 2006 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 interrupt vector addresses The interrupt vectors and the power-up starting address are located in the address range of 0FFFFh−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 (e.g. flash is not programmed) the CPU will go into LPM4 immediately after power−up. INTERRUPT SOURCE INTERRUPT FLAG SYSTEM INTERRUPT WORD ADDRESS PRIORITY Power-up External reset Watchdog Flash key violation PC out-of-range (see Note 1) PORIFG RSTIFG WDTIFG KEYV (see Note 2) Reset 0FFFEh 31, highest NMI Oscillator fault Flash memory access violation NMIIFG OFIFG ACCVIFG (see Notes 2 & 4) (non)-maskable, (non)-maskable, (non)-maskable 0FFFCh 30 0FFFAh 29 0FFF8h 28 Comparator_A+ CAIFG maskable 0FFF6h 27 Watchdog Timer+ WDTIFG maskable 0FFF4h 26 Timer_A2 TACCR0 CCIFG (see Note 3) maskable 0FFF2h 25 Timer_A2 TACCR1 CCIFG, TAIFG (see Notes 2 & 3) maskable 0FFF0h 24 0FFEEh 23 0FFECh 22 0FFEAh 21 0FFE8h 20 I/O Port P2 (eight flags) P2IFG.0 to P2IFG.7 (see Notes 2 & 3) maskable 0FFE6h 19 I/O Port P1 (eight flags) P1IFG.0 to P1IFG.7 (see Notes 2 & 3) maskable 0FFE4h 18 0FFE2h 17 0FFE0h 16 (see Note 5) 0FFDEh 15 (see Note 6) 0FFDCh ... 0FFC0h 14 ... 0, lowest NOTES: 1. A reset is generated if the CPU tries to fetch instructions from within the module register memory address range (0h−01FFh). 2. Multiple source flags 3. Interrupt flags are located in the module 4. (non)-maskable: the individual interrupt-enable bit can disable an interrupt event, but the general interrupt enable cannot. 5. This location is used as bootstrap loader security key (BSLSKEY). A value of 0AA55h at this location disables the BSL completely. A value of 0h disables the erasure of the flash if an invalid password is supplied. 6. The interrupt vectors at addresses 0FFDCh to 0FFC0h are not used in this device and can be used for regular program code if necessary. |
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