Datasheet

MSP430F6638, MSP430F6637, MSP430F6636
MSP430F6635, MSP430F6634, MSP430F6633
MSP430F6632, MSP430F6631, MSP430F6630
www.ti.com SLAS566D –JUNE 2010–REVISED AUGUST 2013
Hardware Multiplier (MPY) (Link to User's Guide)
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) (Link to User's Guide)
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) (Link to User's Guide)
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) (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). SYS also includes a data
exchange mechanism via JTAG called a JTAG mailbox that can be used in the application.
Table 13. System Module Interrupt Vector Registers
INTERRUPT VECTOR
INTERRUPT EVENT WORD ADDRESS OFFSET PRIORITY
REGISTER
No interrupt pending 00h
Brownout (BOR) 02h Highest
RST/NMI (BOR) 04h
DoBOR (BOR) 06h
LPM3.5 or LPM4.5 wakeup (BOR) 08h
Security violation (BOR) 0Ah
SVSL (POR) 0Ch
SVSH (POR) 0Eh
SVML_OVP (POR) 10h
SYSRSTIV, System Reset 019Eh
SVMH_OVP (POR) 12h
DoPOR (POR) 14h
WDT timeout (PUC) 16h
WDT key violation (PUC) 18h
KEYV flash key violation (PUC) 1Ah
Reserved 1Ch
Peripheral area fetch (PUC) 1Eh
PMM key violation (PUC) 20h
Reserved 22h to 3Eh Lowest
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Product Folder Links: MSP430F6638 MSP430F6637 MSP430F6636 MSP430F6635 MSP430F6634 MSP430F6633
MSP430F6632 MSP430F6631 MSP430F6630