SPRUJE9 August   2025 F28E120SB , F28E120SC , TMS320F2800132 , TMS320F2800133 , TMS320F2800135 , TMS320F2800137 , TMS320F2800152-Q1 , TMS320F2800153-Q1 , TMS320F2800154-Q1 , TMS320F2800155 , TMS320F2800155-Q1 , TMS320F2800156-Q1 , TMS320F2800157 , TMS320F2800157-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Feature Differences Between F280015x, F280013x, and F28E12x
    1. 1.1 F280015x, F280013x, and F28E12x Feature Comparison
      1. 1.1.1 F28E12x, F280013x and F280015x Superset Device Comparison
  5. 2PCB Hardware Changes
    1. 2.1 PCB Hardware Changes for the 80-Pin PN, 64-Pin PM and 48-Pin PT or PHP Packages
    2.     F28E12x vs F280013x vs F280015x Pinout Difference Compatibility
    3.     F28E12x vs F280013x vs F280015x Pinout Difference Compatibility
  6. 3Feature Differences for System Consideration
    1. 3.1 New Modules in F28E12x
      1. 3.1.1 Programmable Gain Amplifier (PGA)
    2. 3.2 Communication Module Changes
    3. 3.3 Control Module Changes
    4. 3.4 Analog Module Differences
      1. 3.4.1 Analog Module Register Differences
      2. 3.4.2 ADC Module Changes
      3. 3.4.3 CMPSS Module Variants
    5. 3.5 Other Device Changes
      1. 3.5.1 PLL
      2. 3.5.2 Clock Sources
      3. 3.5.3 PIE Channel Mapping
        1. 3.5.3.1 F28E12x vs. F280015x PIE Channel Map Differences
        2. 3.5.3.2 F28E12x vs. F280013x PIE Channel Map Differences
      4. 3.5.4 Boot ROM
    6. 3.6 Power Management
      1. 3.6.1 LDO/VREG
      2. 3.6.2 POR/BOR
      3. 3.6.3 Power Consumption
    7. 3.7 Memory Module Changes
    8. 3.8 GPIO Multiplexing Changes
      1. 3.8.1 F28E12x vs. F280013x GPIO Mux Changes
      2. 3.8.2 F28E12x vs. F280015x GPIO Mux Changes
    9. 3.9 Analog Multiplexing Changes
  7. 4Application Code Migration From F280015x or F280013x to F28E12x
    1. 4.1 C2000Ware Header Files
    2. 4.2 Linker Command Files
    3. 4.3 C2000Ware Examples
  8. 5Specific Use Cases Related to F28E12x New Features
    1. 5.1 PGA
  9. 6EABI Support
    1. 6.1 Flash API
  10. 7References

3.5.2 Clock Sources

The are four clock sources in F280013x and F280015x devices and all the clocks in the device are derived from one of four clock sources: Primary Internal Oscillator (INTOSC2), Backup Internal Oscillator (INTOSC1), Auxiliary Clock Input (AUXCLKIN), and External Oscillator (XTAL). However, in F28E12x, the clock sources are: Wide Range Oscillator (WROSC), System Oscillator (SYSOSC), Auxiliary Clock Input (AUXCLKIN), and External Oscillator (XTAL). By default, SYSOSC is set as the source for the system reference clock (OSCCLK) and WROSC is set as the backup clock source.

Table 3-8 Clock Sources
Clock Sources F280013x/F280015x F28E12x
Min Max Min Max
XTAL 10MHZ 20MHZ 10MHZ 20MHZ
INTOSC1 10MHZ -
INTOSC2 10MHZ -
SYSOSC - 32MHZ
WROSC - 20MHZ 70MHZ