MSP430F5529, MSP430F5528, MSP430F5527, MSP430F5526
MSP430F5525, MSP430F5524, MSP430F5522, MSP430F5521
MSP430F5519, MSP430F5517, MSP430F5515, MSP430F5514, MSP430F5513
www.ti.com
SLAS590M – MARCH 2009 – REVISED NOVEMBER 2015
6.9.6
Real-Time Clock (RTC_A)
(Link to User's Guide)
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.
6.9.7
Watchdog Timer (WDT_A)
(Link to User's Guide)
The primary function of the 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.
6.9.8
System Module (SYS)
(Link to User's Guide)
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, and configuration management (device descriptors). It also includes a
data exchange mechanism through JTAG called a JTAG mailbox that can be used in the application.
Table 6-9. System Module Interrupt Vector Registers
INTERRUPT VECTOR REGISTER
ADDRESS
INTERRUPT EVENT
VALUE
PRIORITY
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
SYSRSTIV, System Reset
SVMH_OVP (POR)
12h
PMMSWPOR (POR)
14h
WDT time-out (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
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Detailed Description
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