MSP430F673x
MSP430F672x
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SLAS731A –DECEMBER 2011–REVISED APRIL 2012
System Module (SYS)
The SYS module handles many of the system functions within the device. These include power on reset (POR)
and power up clear (PUC) handling, NMI source selection and management, reset interrupt vector generators,
boot strap loader entry mechanisms, as well as, configuration management (device descriptors). It also includes
a data exchange mechanism via JTAG called a JTAG mailbox that can be used in the application.
Table 16. System Module Interrupt Vector Registers
WORD
ADDRESS
INTERRUPT VECTOR REGISTER
INTERRUPT EVENT
OFFSET
PRIORITY
No interrupt pending
Brownout (BOR)
RST/NMI (POR)
DoBOR (BOR)
Wakeup from LPMx.5 (BOR)
Security violation (BOR)
SVSL (POR)
00h
02h
Highest
04h
06h
08h
0Ah
0Ch
SVSH (POR)
0Eh
SVML_OVP (POR)
SVMH_OVP (POR)
DoPOR (POR)
WDT timeout (PUC)
WDT key violation (PUC)
KEYV flash key violation (PUC)
Reserved
10h
SYSRSTIV, System Reset
019Eh
12h
14h
16h
18h
1Ah
1Ch
Peripheral area fetch (PUC)
PMM key violation (PUC)
Reserved
1Eh
20h
22h to 3Eh
00h
Lowest
Highest
No interrupt pending
SVMLIFG
02h
SVMHIFG
04h
DLYLIFG
06h
DLYHIFG
08h
SYSSNIV, System NMI
VMAIFG
019Ch
0Ah
JMBINIFG
0Ch
JMBOUTIFG
0Eh
VLRLIFG
10h
VLRHIFG
12h
Reserved
14h to 1Eh
00h
Lowest
Highest
No interrupt pending
NMIFG
02h
OFIFG
04h
SYSUNIV, User NMI
019Ah
ACCVIFG
06h
AUXSWNMIFG
Reserved
08h
0Ah to 1Eh
Lowest
Watchdog Timer (WDT_A)
The primary function of the watchdog timer (WDT_A) module is to perform a controlled system restart after a
software problem occurs. If the selected time interval expires, a system reset is generated. If the watchdog
function is not needed in an application, the timer can be configured as an interval timer and can generate
interrupts at selected time intervals.
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