Datasheet

MSP430FR4133, MSP430FR4132, MSP430FR4131
www.ti.com SLAS865B –OCTOBER 2014–REVISED AUGUST 2015
6.9.4 Watchdog Timer (WDT)
The primary function of the WDT 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 module can be configured as interval timer and can generate interrupts at
selected time intervals.
Table 6-7. WDT Clocks
NORMAL OPERATION
WDTSSEL
(WATCHDOG AND INTERVAL TIMER MODE)
00 SMCLK
01 ACLK
10 VLOCLK
11 VLOCLK
6.9.5 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, bootstrap loader entry mechanisms, and configuration management (device descriptors). SYS
also includes a data exchange mechanism through SBW called a JTAG mailbox mail box that can be used
in the application.
Table 6-8. System Module Interrupt Vector Registers
INTERRUPT VECTOR
ADDRESS INTERRUPT EVENT VALUE PRIORITY
REGISTER
No interrupt pending 00h
Brownout (BOR) 02h Highest
RSTIFG RST/NMI (BOR) 04h
PMMSWBOR software BOR (BOR) 06h
LPMx.5 wakeup (BOR) 08h
Security violation (BOR) 0Ah
Reserved 0Ch
SVSHIFG SVSH event (BOR) 0Eh
Reserved 10h
Reserved 12h
SYSRSTIV, System Reset 015Eh
PMMSWPOR software POR (POR) 14h
WDTIFG watchdog time-out (PUC) 16h
WDTPW password violation (PUC) 18h
FRCTLPW password violation (PUC) 1Ah
Uncorrectable FRAM bit error detection 1Ch
Peripheral area fetch (PUC) 1Eh
PMMPW PMM password violation (PUC) 20h
Reserved 22h
FLL unlock (PUC) 24h
Reserved 26h to 3Eh Lowest
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