SLAS701B November   2010  – June 2018 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253

PRODUCTION DATA.  

  1. 1Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2Revision History
  3. 3Device Comparison
    1. 3.1 Related Products
  4. 4Terminal Configuration and Functions
    1. 4.1 Pin Diagrams
    2. 4.2 Signal Descriptions
      1. Table 4-1 Terminal Functions
  5. 5Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Resistance Characteristics for PW-24 Package
    5. 5.5  Active Mode Supply Current (Into DVCC and AVCC) Excluding External Current
    6. 5.6  Typical Characteristics – Active-Mode Supply Current (Into DVCC and AVCC)
    7. 5.7  Low-Power-Mode Supply Currents (Into VCC) Excluding External Current
    8. 5.8  Typical Characteristics – LPM4 Current
    9. 5.9  Schmitt-Trigger Inputs (Ports Px and RST/NMI)
    10. 5.10 Leakage Current (Ports Px)
    11. 5.11 Outputs (Ports Px)
    12. 5.12 Output Frequency (Ports Px)
    13. 5.13 Typical Characteristics – Outputs
    14. 5.14 POR, BOR
    15. 5.15 Typical Characteristics – POR, BOR
    16. 5.16 Supply Voltage Supervisor (SVS), Supply Voltage Monitor (SVM)
    17. 5.17 Main DCO Characteristics
    18. 5.18 DCO Frequency
    19. 5.19 Calibrated DCO Frequencies – Tolerance
    20. 5.20 Wake-up Times From Lower-Power Modes (LPM3, LPM4)
    21. 5.21 Typical Characteristics – DCO Clock Wake-up Time
    22. 5.22 Internal Very-Low-Power Low-Frequency Oscillator (VLO)
    23. 5.23 Crystal Oscillator (XT2)
    24. 5.24 Typical Characteristics – XT2 Oscillator
    25. 5.25 SD24_A, Power Supply
    26. 5.26 SD24_A, Input Range
    27. 5.27 SD24_A, Performance
    28. 5.28 SD24_A, Temperature Sensor and Built-In VCC Sense
    29. 5.29 SD24_A, Built-In Voltage Reference
    30. 5.30 SD24_A, Reference Output Buffer
    31. 5.31 SD24_A, External Reference Input
    32. 5.32 USART0
    33. 5.33 Timer_A3
    34. 5.34 Flash Memory
    35. 5.35 RAM
    36. 5.36 JTAG and Spy-Bi-Wire Interface
    37. 5.37 JTAG Fuse
  6. 6Detailed Description
    1. 6.1  CPU
    2. 6.2  Instruction Set
    3. 6.3  Operating Modes
    4. 6.4  Interrupt Vector Addresses
    5. 6.5  Special Function Registers
      1. Table 6-4 Interrupt Enable Register 1 Field Descriptions
      2. Table 6-5 Interrupt Flag Register 1 Field Descriptions
      3. Table 6-6 Module Enable Register 1 Field Descriptions
    6. 6.6  Memory Organization
    7. 6.7  Flash Memory
    8. 6.8  Peripherals
    9. 6.9  Oscillator and System Clock
    10. 6.10 Brownout, Supply Voltage Supervisor
    11. 6.11 Digital I/O
    12. 6.12 Watchdog Timer (WDT+)
    13. 6.13 Timer_A3
    14. 6.14 USART0
    15. 6.15 Hardware Multiplier
    16. 6.16 SD24_A
    17. 6.17 Peripheral File Map
    18. 6.18 I/O Port Schematics
      1. 6.18.1 Port P1 Pin Schematic: P1.0 Input/Output With Schmitt Trigger
      2. 6.18.2 Port P1 Pin Schematic: P1.1 and P1.2 Input/Output With Schmitt Trigger
      3. 6.18.3 Port P1 Pin Schematic: P1.3 Input/Output With Schmitt Trigger
      4. 6.18.4 Port P1 Pin Schematic: P1.4 Input/Output With Schmitt Trigger
      5. 6.18.5 Port P1 Pin Schematic: P1.5 to P1.7 Input/Output With Schmitt Trigger
      6. 6.18.6 Port P2 Pin Schematic: P2.0 Input/Output With Schmitt Trigger
      7. 6.18.7 Port P2 Pin Schematic: P2.6, Input/Output With Schmitt Trigger
      8. 6.18.8 Port P2 Pin Schematic: P2.7, Input/Output With Schmitt Trigger
      9. 6.18.9 JTAG Fuse Check Mode
  7. 7Device and Documentation Support
    1. 7.1 Getting Started
    2. 7.2 Device Nomenclature
    3. 7.3 Tools and Software
    4. 7.4 Documentation Support
    5. 7.5 Related Links
    6. 7.6 Community Resources
    7. 7.7 Trademarks
    8. 7.8 Electrostatic Discharge Caution
    9. 7.9 Glossary
  8. 8Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.9 Oscillator and System Clock

The clock system is supported by the Basic Clock module that includes support for an internal digitally controlled oscillator (DCO), a high-frequency crystal oscillator, and an internal very-low-power low-frequency oscillator (VLO). The clock module is designed to meet the requirements of both low system cost and low power consumption. The internal DCO provides a fast turnon clock source and stabilizes in less than 1 µs. The clock module provides the following clock signals:

  • Auxiliary clock (ACLK), sourced from the VLO
  • Main clock (MCLK), the system clock used by the CPU
  • Sub-Main clock (SMCLK), the subsystem clock used by the peripheral modules

Table 6-8 lists the addresses of the available DCO calibration data.

Table 6-8 DCO Calibration Data
(Provided From Factory in Flash Information Memory Segment A)

DCO FREQUENCY CALIBRATION REGISTER SIZE ADDRESS
8 MHz CALBC1_8MHZ byte 010FDh
CALDCO_8MHZ byte 010FCh
12 MHz CALBC1_12MHZ byte 010FBh
CALDCO_12MHZ byte 010FAh