SLAA649G October   2014  – August 2021 MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2013-EP , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2254 , MSP430F2272 , MSP430F2274 , MSP430F2274-EP , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F249-EP , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430F2619S-HT , MSP430FR2032 , MSP430FR2033 , MSP430FR2110 , MSP430FR2111 , MSP430FR2153 , MSP430FR2155 , MSP430FR2310 , MSP430FR2311 , MSP430FR2353 , MSP430FR2355 , MSP430FR2433 , MSP430FR2475 , MSP430FR2476 , MSP430FR2532 , MSP430FR2533 , MSP430FR2632 , MSP430FR2633 , MSP430FR2672 , MSP430FR2673 , MSP430FR2675 , MSP430FR2676 , MSP430FR4131 , MSP430FR4132 , MSP430FR4133 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2230-EP , MSP430G2231 , MSP430G2231-EP , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2302-EP , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2332-EP , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430I2020 , MSP430I2021 , MSP430I2030 , MSP430I2031 , MSP430I2040 , MSP430I2041

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Comparison of MSP430FR4xx and MSP430FR2xx Devices
  4. 3 In-System Programming of Nonvolatile Memory
    1. 3.1 Ferroelectric RAM (FRAM) Overview
    2. 3.2 FRAM Cell
    3. 3.3 Protecting FRAM Using the Memory Write Protection Bit
    4. 3.4 FRAM Memory Wait States
    5. 3.5 Bootloader (BSL)
    6. 3.6 JTAG and Security
    7. 3.7 Production Programming
  5. 4 Hardware Migration Considerations
  6. 5 Device Calibration Information
  7. 6 Important Device Specifications
  8. 7 Core Architecture Considerations
    1. 7.1 Power Management Module (PMM)
      1. 7.1.1 Core LDO and LPM3.5 LDO
      2. 7.1.2 SVS
      3. 7.1.3 VREF
      4. 7.1.4 Debug in Low-Power Mode
    2. 7.2 Clock System
      1. 7.2.1 DCO Frequencies
      2. 7.2.2 FLL, REFO, and DCO Tap
      3. 7.2.3 FRAM Access at 16 MHz, ADC Clock, and Clocks-on-Demand
    3. 7.3 Operating Modes, Wake-up Times, and Reset
      1. 7.3.1 LPMx.5
      2. 7.3.2 Reset
        1. 7.3.2.1 Behavior of POR and BOR
        2. 7.3.2.2 Reset Generation
        3. 7.3.2.3 Determining the Cause of Reset
    4. 7.4 Interrupt Vectors
    5. 7.5 FRAM and the FRAM Controller
      1. 7.5.1 Flash and FRAM Overview Comparison
      2. 7.5.2 Cache Architecture
  9. 8 Peripheral Considerations
    1. 8.1  Watchdog Timer
    2. 8.2  Ports
      1. 8.2.1 Digital Input/Output
      2. 8.2.2 Capacitive Touch I/O
    3. 8.3  Analog-to-Digital Converters
      1. 8.3.1 ADC10 to ADC
    4. 8.4  Communication Modules
      1. 8.4.1 USI to eUSCI
      2. 8.4.2 USCI to eUSCI
    5. 8.5  Timer and IR Modulation Logic
    6. 8.6  Backup Memory
    7. 8.7  Hardware Multiplier (MPY32)
    8. 8.8  RTC Counter
    9. 8.9  Interrupt Compare Controller (ICC)
    10. 8.10 LCD
    11. 8.11 Smart Analog Combo (SAC)
    12. 8.12 Comparator
  10. 9 ROM Libraries
  11. 10Conclusion
  12. 11References
  13. 12Revision History

8.8 RTC Counter

A Real-Time Clock (RTC) counter module is available in FR4xx family devices. The RTC counter is a 16-bit counter that is functional in active mode (AM), LPM0, LPM3, and LPM3.5 low-power modes. The RTC counter accepts multiple clock sources, selected by control register settings, to generate timing from less than 1 µs up to many hours. One example use of the RTC counter module is for a software calendar. Combined with the LFXT clock and LPM3.5, an ultra-low-power RTC application can be achieved. The base address for the RTC registers is different for FR413x and FR203x devices compared to other FR4xx devices. See the device-specific data sheet for details.

MSP430FR231x, MSP430FR21xx, MSP430FR2000, MSP430FR235x, MSP430FR215x, MSP430FR267x, and MSP430FR247x devices support the control bit RTCCKSEL in the SYSCFG2 register. This bit is not available in other FR4xx devices. The RTCCKSEL bit can select ACLK or SMCLK as the clock source for the RTC.