SPRABJ8B September   2022  – November 2023 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , AM263P4

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
    1. 1.1 Acronyms
  5. 2 Power
    1. 2.1 Discrete DC-DC Power Solution
    2. 2.2 Integrated PMIC Power Solution
    3. 2.3 Power Decoupling and Filtering
    4. 2.4 Power Consumption
    5. 2.5 Power Distribution Network
      1. 2.5.1 Simulations
        1. 2.5.1.1 Core Digital Power 1.2 V
        2. 2.5.1.2 Digital/Analog I/O Power 3.3 V
    6. 2.6 e-Fuse Power
  6. 3 Clocking
    1. 3.1 Crystal and Oscillator Input Options
    2. 3.2 Output Clock Generation
    3. 3.3 Crystal Selection and Shunt Capacitance
    4. 3.4 Crystal Placement and Routing
  7. 4 Resets
  8. 5 Bootstrapping
    1. 5.1 SOP Signal Implementation
    2. 5.2 OSPI/QSPI Memory Implementation
    3. 5.3 ROM OSPI/QSPI Boot Requirements
  9. 6 JTAG Emulators and Trace
  10. 7 Multiplexed Peripherals
  11. 8 Digital Peripherals
    1. 8.1 General Digital Peripheral Routing Guidelines
  12. 9 Analog Peripherals
    1. 9.1 General Analog Peripheral Routing Guidelines
      1. 9.1.1 Resolver ADC Routing Guidelines
  13. 10Layer Stackup
    1. 10.1 Key Stackup Features
  14. 11Vias
  15. 12BGA Power Fan-Out and Decoupling Placement
    1. 12.1 Ground Return
    2. 12.2 1.2 V Core Digital Power
      1. 12.2.1 Key Layout Considerations
    3. 12.3 3.3 V Digital and Analog Power
      1. 12.3.1 Key Layout Considerations
    4. 12.4 1.8 V Digital and Analog Power
      1. 12.4.1 Key Layout Considerations
  16. 13References
  17.   Revision History

2.1 Discrete DC-DC Power Solution

The AM263x Launchpad and AM263x controlCard EVM designs both integrate a set of buck-converter, DC-DC regulators that may be useful as a reference power solution for some systems. This solution consists of a pair of TPS62913 buck-converter regulators for AM263x MCU core, system digital and analog I/O power, and a set of TPS74801 LDO for powering paired industrial Ethernet PHY.

Current and transient requirements of the DC-DC closed-loop and passive power plane and decoupling network are taken from the power consumption and transient loading tables: Table 2-3 and Table 2-4. Many DC-DC regulators can be matched to fit within these requirements and the maximum power consumption.

It is also recommended to use the power-good generation circuits available on these and similar DC-DC regulators to drive the power on reset (PORz) into the AM263x.

GUID-20220808-SS0I-F8S1-0SD6-K0W74XGWKQZ1-low.svg Figure 2-1 AM263x DC-DC Regulator Example Solution
GUID-20220808-SS0I-3BGG-WQ40-QB8DBSGGZ5TC-low.svg Figure 2-2 AM263x LP-AM263 Schematic Excerpt 1.2 V Core Power Implementation
GUID-20220808-SS0I-T4XB-S2ZM-N6NVWMCGZPZQ-low.svg Figure 2-3 AM263x LP-AM263 Schematic Excerpt 3.3 V System Digital/Analog I/O Power Implementation
GUID-20220808-SS0I-PQDN-6QWB-JNRLFG1BJHNR-low.svg Figure 2-4 AM263x LP-AM263 Schematic Excerpt – Power Good Implementation (see PORz Reset Implementation as well)