MSP430F663x
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SLAS566C –JUNE 2010–REVISED AUGUST 2012
Hardware Multiplier
The multiplication operation is supported by a dedicated peripheral module. The module performs operations with
32-bit, 24-bit, 16-bit, and 8-bit operands. The module is capable of supporting signed and unsigned multiplication
as well as signed and unsigned multiply and accumulate operations.
Real-Time Clock (RTC_B)
The RTC_B module can be configured for real-time clock (RTC) or calendar mode providing seconds, minutes,
hours, day of week, day of month, month, and year. Calendar mode integrates an internal calendar which
compensates for months with less than 31 days and includes leap year correction. The RTC_B also supports
flexible alarm functions and offset-calibration hardware. The implementation on this device supports operation in
LPM3.5 mode and operation from a backup supply.
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, and configuration management (device descriptors). SYS also includes a data
exchange mechanism via JTAG called a JTAG mailbox that can be used in the application.
Table 14. System Module Interrupt Vector Registers
INTERRUPT VECTOR
INTERRUPT EVENT
WORD ADDRESS
OFFSET
PRIORITY
REGISTER
No interrupt pending
Brownout (BOR)
00h
02h
Highest
RST/NMI (BOR)
04h
DoBOR (BOR)
06h
LPM3.5 or LPM4.5 wakeup (BOR)
Security violation (BOR)
SVSL (POR)
08h
0Ah
0Ch
0Eh
SVSH (POR)
SVML_OVP (POR)
SVMH_OVP (POR)
DoPOR (POR)
10h
SYSRSTIV, System Reset
019Eh
12h
14h
WDT timeout (PUC)
WDT key violation (PUC)
KEYV flash key violation (PUC)
Reserved
16h
18h
1Ah
1Ch
1Eh
Peripheral area fetch (PUC)
PMM key violation (PUC)
Reserved
20h
22h to 3Eh
Lowest
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