MSP430FR6889 Datasheet, PDF (80/176 Pages) Texas Instruments – Mixed-Signal Microcontrollers

MSP430FR6889, MSP430FR68891, MSP430FR6888, MSP430FR6887
MSP430FR5889, MSP430FR58891, MSP430FR5888, MSP430FR5887
SLASE32A – AUGUST 2014 – REVISED MARCH 2015
www.ti.com
6.11.4 Hardware Multiplier (MPY)
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 supports signed and unsigned
multiplication as well as signed and unsigned multiply-and-accumulate operations.
6.11.5 Real-Time Clock (RTC_C)
The RTC_C module contains an integrated real-time clock (RTC) with the following features implemented:
• Calendar mode with leap year correction.
• General-purpose counter mode.
The internal calendar compensates months with less than 31 days and includes leap year correction. The
RTC_C also supports flexible alarm functions and offset-calibration hardware. RTC operation is available
in LPM3.5 modes to minimize power consumption.
6.11.6 Watchdog Timer (WDT_A)
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.
NOTE
In watchdog mode the watchdog timer WDT prevents entry into LPM3.5 or LPM4.5 because
this would deactivate the watchdog.
Table 6-7. WDT_A Clocks
WDTSSELx
00
01
10
11
Normal Operation
(watchdog and interval timer mode)
SMCLK
ACLK
VLOCLK
LFMODCLK
6.11.7 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.
Table 6-8. System Module Interrupt Vector Registers
INTERRUPT VECTOR REGISTER
SYSRSTIV, System Reset
ADDRESS
019Eh
INTERRUPT EVENT
No interrupt pending
Brownout (BOR)
RSTIFG RST/NMI (BOR)
PMMSWBOR software BOR (BOR)
LPMx.5 wakeup (BOR)
Security violation (BOR)
Reserved
VALUE
00h
02h
04h
06h
08h
0Ah
0Ch
PRIORITY
Highest
80
Detailed Description
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MSP430FR58891 MSP430FR5888 MSP430FR5887