SLASEO7C March   2019  – September 2021 MSP430FR2475 , MSP430FR2476

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Functional Block Diagram
  5. 5 Revision History
  6. 6 Device Comparison
    1. 6.1 Related Products
  7. 7 Terminal Configuration and Functions
    1. 7.1 Pin Diagrams
    2. 7.2 Pin Attributes
    3. 7.3 Signal Descriptions
    4. 7.4 Pin Multiplexing
    5. 7.5 Buffer Types
    6. 7.6 Connection of Unused Pins
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Active Mode Supply Current Into VCC Excluding External Current
    5. 8.5  Active Mode Supply Current Per MHz
    6. 8.6  Low-Power Mode LPM0 Supply Currents Into VCC Excluding External Current
    7. 8.7  Low-Power Mode (LPM3, LPM4) Supply Currents (Into VCC) Excluding External Current
    8. 8.8  Low-Power Mode LPMx.5 Supply Currents (Into VCC) Excluding External Current
    9. 8.9  Typical Characteristics – Low-Power Mode Supply Currents
    10. 8.10 Current Consumption Per Module
    11. 8.11 Thermal Resistance Characteristics
    12. 8.12 Timing and Switching Characteristics
      1. 8.12.1  Power Supply Sequencing
        1. 8.12.1.1 PMM, SVS and BOR
      2. 8.12.2  Reset Timing
        1. 8.12.2.1 Wake-up Times From Low-Power Modes and Reset
      3. 8.12.3  Clock Specifications
        1. 8.12.3.1 XT1 Crystal Oscillator (Low Frequency)
        2. 8.12.3.2 DCO FLL, Frequency
        3. 8.12.3.3 DCO Frequency
        4. 8.12.3.4 REFO
        5. 8.12.3.5 Internal Very-Low-Power Low-Frequency Oscillator (VLO)
        6. 8.12.3.6 Module Oscillator (MODOSC)
      4. 8.12.4  Digital I/Os
        1. 8.12.4.1 Digital Inputs
        2. 8.12.4.2 Digital Outputs
        3. 8.12.4.3 Typical Characteristics – Outputs at 3 V and 2 V
      5. 8.12.5  Internal Shared Reference
        1. 8.12.5.1 Internal Reference Characteristics
      6. 8.12.6  Timer_A and Timer_B
        1. 8.12.6.1 Timer_A
        2. 8.12.6.2 Timer_B
      7. 8.12.7  eUSCI
        1. 8.12.7.1 eUSCI (UART Mode) Clock Frequency
        2. 8.12.7.2 eUSCI (UART Mode) Timing Characteristics
        3. 8.12.7.3 eUSCI (SPI Master Mode) Clock Frequency
        4. 8.12.7.4 eUSCI (SPI Master Mode)
        5. 8.12.7.5 eUSCI (SPI Slave Mode)
        6. 8.12.7.6 eUSCI (I2C Mode)
      8. 8.12.8  ADC
        1. 8.12.8.1 ADC, Power Supply and Input Range Conditions
        2. 8.12.8.2 ADC, Timing Parameters
        3. 8.12.8.3 ADC, Linearity Parameters
      9. 8.12.9  Enhanced Comparator (eCOMP)
        1. 8.12.9.1 eCOMP0 Characteristics
      10. 8.12.10 FRAM
        1. 8.12.10.1 FRAM Characteristics
      11. 8.12.11 Debug and Emulation
        1. 8.12.11.1 JTAG, 4-Wire and Spy-Bi-Wire Interface
  9. 9 Detailed Description
    1. 9.1  Overview
    2. 9.2  CPU
    3. 9.3  Operating Modes
    4. 9.4  Interrupt Vector Addresses
    5. 9.5  Bootloader (BSL)
    6. 9.6  JTAG Standard Interface
    7. 9.7  Spy-Bi-Wire Interface (SBW)
    8. 9.8  FRAM
    9. 9.9  Memory Protection
    10. 9.10 Peripherals
      1. 9.10.1  Power-Management Module (PMM)
      2. 9.10.2  Clock System (CS) and Clock Distribution
      3. 9.10.3  General-Purpose Input/Output Port (I/O)
      4. 9.10.4  Watchdog Timer (WDT)
      5. 9.10.5  System (SYS) Module
      6. 9.10.6  Cyclic Redundancy Check (CRC)
      7. 9.10.7  Enhanced Universal Serial Communication Interface (eUSCI_A0, eUSCI_B0)
      8. 9.10.8  Timers (TA0, TA1, TA2, TA3 and TB0)
      9. 9.10.9  Hardware Multiplier (MPY)
      10. 9.10.10 Backup Memory (BAKMEM)
      11. 9.10.11 Real-Time Clock (RTC)
      12. 9.10.12 12-Bit Analog-to-Digital Converter (ADC)
      13. 9.10.13 eCOMP0
      14. 9.10.14 Embedded Emulation Module (EEM)
    11. 9.11 Input/Output Diagrams
      1. 9.11.1 Port P1 (P1.0 to P1.7) Input/Output With Schmitt Trigger
      2. 9.11.2 Port P2 (P2.0 to P2.7) Input/Output With Schmitt Trigger
      3. 9.11.3 Port P3 (P3.0 to P3.7) Input/Output With Schmitt Trigger
      4. 9.11.4 Port P4 (P4.0 to P4.7) Input/Output With Schmitt Trigger
      5. 9.11.5 Port P5 (P5.0 to P5.7) Input/Output With Schmitt Trigger
      6. 9.11.6 Port P6 (P6.0 to P6.2) Input/Output With Schmitt Trigger
    12. 9.12 Device Descriptors
    13. 9.13 Memory
      1. 9.13.1 Memory Organization
      2. 9.13.2 Peripheral File Map
    14. 9.14 Identification
      1. 9.14.1 Revision Identification
      2. 9.14.2 Device Identification
      3. 9.14.3 JTAG Identification
  10. 10Applications, Implementation, and Layout
    1. 10.1 Device Connection and Layout Fundamentals
      1. 10.1.1 Power Supply Decoupling and Bulk Capacitors
      2. 10.1.2 External Oscillator
      3. 10.1.3 JTAG
      4. 10.1.4 Reset
      5. 10.1.5 Unused Pins
      6. 10.1.6 General Layout Recommendations
      7. 10.1.7 Do's and Don'ts
    2. 10.2 Peripheral- and Interface-Specific Design Information
      1. 10.2.1 ADC Peripheral
        1. 10.2.1.1 Partial Schematic
        2. 10.2.1.2 Design Requirements
        3. 10.2.1.3 Layout Guidelines
  11. 11Device and Documentation Support
    1. 11.1 Getting Started and Next Steps
    2. 11.2 Device Nomenclature
    3. 11.3 Tools and Software
    4. 11.4 Documentation Support
    5. 11.5 Support Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Export Control Notice
    9. 11.9 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

8.12.3.1 XT1 Crystal Oscillator (Low Frequency)

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)(1)(2)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
fXT1, LF XT1 oscillator crystal, low frequency LFXTBYPASS = 0 32768 Hz
DCXT1, LF XT1 oscillator LF duty cycle Measured at MCLK,
fLFXT = 32768 Hz		 30% 70%
fXT1,SW XT1 oscillator logic-level square-wave input frequency LFXTBYPASS = 1 (3)(4) 32.768 kHz
DCXT1, SW LFXT oscillator logic-level square-wave input duty cycle LFXTBYPASS = 1 40% 60%
OALFXT Oscillation allowance for LF crystals (5) LFXTBYPASS = 0, LFXTDRIVE = {3},
fLFXT = 32768 Hz, CL,eff = 12.5 pF		 200 kΩ
CL,eff Integrated effective load capacitance(6) See (7) 1 pF
tSTART,LFXT Start-up time (9) fOSC = 32768 Hz,
LFXTBYPASS = 0, LFXTDRIVE = {3},
TA = 25°C, CL,eff = 12.5 pF		 1000 ms
fFault,LFXT Oscillator fault frequency (10) XTS = 0(8) 0 3500 Hz
(1) To improve EMI on the LFXT oscillator, observe the following guidelines:
  • Keep the trace between the device and the crystal as short as possible.
  • Design a good ground plane around the oscillator pins.
  • Prevent crosstalk from other clock or data lines into oscillator pins XIN and XOUT.
  • Avoid running PCB traces underneath or adjacent to the XIN and XOUT pins.
  • Use assembly materials and processes that avoid any parasitic load on the oscillator XIN and XOUT pins.
  • If conformal coating is used, make sure that it does not induce capacitive or resistive leakage between the oscillator pins.
(2) See the MSP430 32-kHz Crystal Oscillators application note for details on crystal section, layout, and testing.
(3) When LFXTBYPASS is set, LFXT circuits are automatically powered down. Input signal is a digital square wave with parametrics defined in the Schmitt-trigger inputs section of this data sheet. Duty cycle requirements are defined by DCLFXT, SW.
(4) Maximum frequency of operation of the entire device cannot be exceeded.
(5) Oscillation allowance is based on a safety factor of 5 for recommended crystals. The oscillation allowance is a function of the LFXTDRIVE settings and the effective load. In general, comparable oscillator allowance can be achieved based on the following guidelines, but should be evaluated based on the actual crystal selected for the application:
  • For LFXTDRIVE = {0}, CL,eff = 3.7 pF
  • For LFXTDRIVE = {1}, 6 pF ≤ CL,eff ≤ 9 pF
  • For LFXTDRIVE = {2}, 6 pF ≤ CL,eff ≤ 10 pF
  • For LFXTDRIVE = {3}, 6 pF ≤ CL,eff ≤ 12 pF
(6) Includes parasitic bond and package capacitance (approximately 2 pF per pin).
(7) Requires external capacitors at both terminals to meet the effective load capacitance specified by crystal manufacturers. Recommended effective load capacitance values supported are 3.7 pF, 6 pF, 9 pF, and 12.5 pF. Maximum shunt capacitance of 1.6 pF. The PCB adds additional capacitance, so it must also be considered in the overall capacitance. Verify that the recommended effective load capacitance of the selected crystal is met.
(8) Measured with logic-level input frequency but also applies to operation with crystals.
(9) Includes start-up counter of 1024 clock cycles.
(10) Frequencies above the MAX specification do not set the fault flag. Frequencies between the MIN and MAX specifications might set the flag. A static condition or stuck at fault condition sets the flag.