Datasheet

Table Of Contents
MSP430F5342, MSP430F5341, MSP430F5340
SLAS706E JULY 2011REVISED AUGUST 2013
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Real-Time Clock (RTC_A)
The RTC_A module can be used as a general-purpose 32-bit counter (counter mode) or as an integrated real-
time clock (RTC) (calendar mode). In counter mode, the RTC_A also includes two independent 8-bit timers that
can be cascaded to form a 16-bit timer/counter. Both timers can be read and written by software. Calendar mode
integrates an internal calendar which compensates for months with less than 31 days and includes leap year
correction. The RTC_A also supports flexible alarm functions and offset-calibration hardware.
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 module can be configured as an interval timer and can generate
interrupts at selected time intervals.
System Module (SYS)
The SYS module handles many of the system functions within the device. These include power on reset and
power up clear handling, NMI source selection and management, reset interrupt vector generators, bootstrap
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 10. System Module Interrupt Vector Registers
INTERRUPT VECTOR REGISTER ADDRESS INTERRUPT EVENT VALUE PRIORITY
SYSRSTIV, System Reset 019Eh No interrupt pending 00h
Brownout (BOR) 02h Highest
RST/NMI (POR) 04h
PMMSWBOR (BOR) 06h
Wakeup from LPMx.5 08h
Security violation (BOR) 0Ah
SVSL (POR) 0Ch
SVSH (POR) 0Eh
SVML_OVP (POR) 10h
SVMH_OVP (POR) 12h
PMMSWPOR (POR) 14h
WDT timeout (PUC) 16h
WDT password violation (PUC) 18h
KEYV flash password violation (PUC) 1Ah
Reserved 1Ch
Peripheral area fetch (PUC) 1Eh
PMM password violation (PUC) 20h
Reserved 22h to 3Eh Lowest
SYSSNIV, System NMI 019Ch No interrupt pending 00h
SVMLIFG 02h Highest
SVMHIFG 04h
SVSMLDLYIFG 06h
SVSMHDLYIFG 08h
VMAIFG 0Ah
JMBINIFG 0Ch
JMBOUTIFG 0Eh
SVMLVLRIFG 10h
SVMHVLRIFG 12h
Reserved 14h to 1Eh Lowest
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