MSP430F543X_1 Datasheet, PDF (18/90 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F543x, MSP430F541x
MSP430F543xA, MSP430F541xA
SLAS612 – SEPTEMBER 2008.......................................................................................................................................................................................... www.ti.com
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, 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.
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