SPRUJ51 june   2023

 

  1.   1
  2. 1Abstract
  3. 2EVM Revisions and Assembly Variants
    1. 2.1 Inside the Box
    2. 2.2 EMC, EMI and ESD Compliance
  4.   Trademarks
  5. 3System Description
    1. 3.1 Key Features
      1. 3.1.1 Processor
      2. 3.1.2 Power Supply
      3. 3.1.3 Memory
      4. 3.1.4 JTAG Emulator
      5. 3.1.5 Supported Interfaces and Peripherals
      6. 3.1.6 Expansion Connectors Headers to Support Application Specific Add On Boards
    2. 3.2 Functional Block Diagram
    3. 3.3 AM62x-Low Power SK EVM Interface Mapping
    4. 3.4 Power ON OFF Procedures
      1. 3.4.1 Power-On Procedure
      2. 3.4.2 Power-Off Procedure
      3. 3.4.3 Power Test Points
    5. 3.5 Peripheral and Major Component Description
      1. 3.5.1  Clocking
      2. 3.5.2  Reset
      3. 3.5.3  OLDI Display Interface
      4. 3.5.4  CSI Interface
      5. 3.5.5  Audio Codec Interface
      6. 3.5.6  HDMI Display Interface
      7. 3.5.7  JTAG Interface
      8. 3.5.8  Test Automation Header
      9. 3.5.9  UART Interface
      10. 3.5.10 USB Interface
        1. 3.5.10.1 USB 2.0 Type A Interface
        2. 3.5.10.2 USB 2.0 Type C Interface
      11. 3.5.11 Memory Interfaces
        1. 3.5.11.1 LPDDR4 Interface
        2. 3.5.11.2 OSPI Interface
        3. 3.5.11.3 MMC Interfaces
          1. 3.5.11.3.1 MMC0 - eMMC Interface
          2. 3.5.11.3.2 MMC1 - Micro SD Interface
          3. 3.5.11.3.3 MMC2 - M2 Key E Interface
        4. 3.5.11.4 EEPROM
      12. 3.5.12 Ethernet Interface
        1. 3.5.12.1 CPSW Ethernet PHY1 Default Configuration
        2. 3.5.12.2 CPSW Ethernet PHY2 Default Configuration
      13. 3.5.13 GPIO Port Expander
      14. 3.5.14 GPIO Mapping
      15. 3.5.15 Power
        1. 3.5.15.1 Power Requirements
        2. 3.5.15.2 Power Input
        3. 3.5.15.3 Power Supply
        4. 3.5.15.4 Power Sequencing
        5. 3.5.15.5 AM62x 17x17 SoC Power
        6. 3.5.15.6 Current Monitoring
      16. 3.5.16 AM62x-Low Power SK EVM User Setup and Configuration
        1. 3.5.16.1 EVM DIP Switches
        2. 3.5.16.2 Boot Modes
        3. 3.5.16.3 User Test LEDs
      17. 3.5.17 Expansion Headers
        1. 3.5.17.1 User Expansion Connector
        2. 3.5.17.2 MCU Connector
        3. 3.5.17.3 PRU Connector
      18. 3.5.18 Push Buttons
      19. 3.5.19 I2C Address Mapping
  6. 4Known Issues and Modifications
  7. 5Revision History
  8. 6IMPORTANT NOTICE AND DISCLAIMER

3.5.15.1 Power Requirements

AM62x-Low Power SK EVM can be powered through either of the two USB Type C Connectors –

  • Connector 1(J13) - Power role – SINK, No Data role
  • Connector 2(J15) - Power role – DRP, Data role – USB2.0 DFP or UFP

The AM62x-Low Power SK EVM supports voltage input ranges of 5V - 15V and 3A of current. A USB PD controller Mfr. Part#TPS65988DHRSHR is used for PD negotiation upon cable detection to get necessary power required for the board. Connector 1 is configured to be an UFP Port and has no Data role. Connector 2 is configured as a DRP port, it can act as DFP only when the board is being powered by Connector 1. When both the connectors are connected to external power supply, the port with highest PD power contract will be selected to power the board.

Table 3-13 Type-C port Power roles
J13(UFP) J15(DRP) BoardPower Remarks
Plugged in NC ON - J13 J13will be UFP and will only sink power & J15 can act as DFP if a peripheral is connected
NC Plugged in ON - J15 J15will be UFP and can only sink power
Plugged in Plugged in ON- J13 or J15 Boardwill be powered by the port with highest PD power contract

The PD IC uses a SPI EEPROM to load the necessary configuration on power up so it can negotiate a power contract with a compatible power source.

The configuration file is loaded to the EEPROM using header J23. Once the EEPROM is programmed the PD obtainsthe configuration files via SPI communication. Upon loading the configuration files the PD negotiates with the source to obtain the necessary power requirement.

Power indication LEDs are provided for both the Type-C connectors for the user to identify which connector is powering the SKEVM Board. An external power supply (Type-C output) can be used to power the EVM but is not included as part of the SKEVM kit.
Table 3-14 Recommended External Power Supplies
DigiKeyPart# Manufacturer Manufacturer Part #
1939-1794-ND GlobTek, Inc. TR9CZ3000USBCG2R6BF2(*)
Q1251-ND Qualtek QADC-65-20-08CB
Note: Minimum Voltage: 5 VDC, Recommended Minimum Current: 3000 mA, Maximum Voltage: 15VDC, Maximum current: 5000mA. Because SK-AM62-LP implements USB PD for power, the device is able to negotiate to the highest Voltage/Current combination supported by both the Device and Power Adapter, as such, if the power supply exceeds the maximum voltage and current requirements listed above is acceptable as long as the power adapter is compliant with the USB-C PD specification.

(*) This is the adapter part number used for compliance testing.

Note: TI recommends using an external power supply or power accessory which complies with applicable regional safety standards such as (by example) UL, CSA, VDE, CCC, PSE, etc.
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