SPRUJ64 September   2022

 

  1.   Abstract
  2.   Trademarks
  3. 1Key Features
  4. 2AM64x SKEVM Overview
    1. 2.1 Board Version Identification
  5. 3Functional Block Diagram
  6. 4System Description
    1. 4.1  Clocking
      1. 4.1.1 Ethernet PHY Clock
      2. 4.1.2 AM64x SoC Clock
    2. 4.2  Reset
    3. 4.3  Power Requirements
      1. 4.3.1 Power Input
      2. 4.3.2 USB Type-C Interface for Power Input
      3. 4.3.3 Power Fault Indication
      4. 4.3.4 Power Supply
      5. 4.3.5 Power Sequencing
      6. 4.3.6 SOC Power
    4. 4.4  Configuration
      1. 4.4.1 Boot Modes
    5. 4.5  JTAG
    6. 4.6  Test Automation
    7. 4.7  UART Interface
    8. 4.8  Memory Interfaces
      1. 4.8.1 LPDDR4 Interface
      2. 4.8.2 MMC Interface
        1. 4.8.2.1 Micro SD Interface
        2. 4.8.2.2 WiLink Interface
        3. 4.8.2.3 OSPI Interface
        4. 4.8.2.4 Board ID EEPROM Interface
    9. 4.9  Ethernet Interface
      1. 4.9.1 DP83867 PHY Default Configuration
      2. 4.9.2 DP83867 – Power, Clock, Reset, Interrupt, and LEDs
      3. 4.9.3 Industrial Application LEDs for Indication
    10. 4.10 USB 3.0 Interface
    11. 4.11 PRU Connector
    12. 4.12 User Expansion Connector
    13. 4.13 MCU Connector
    14. 4.14 Interrupt
    15. 4.15 I2C Interface
    16. 4.16 IO Expander (GPIOs)
  7. 5Known Issues and Modifications
    1. 5.1 Issue 1 - Silkscreen Missprint on Initial Board Batch
  8. 6Revision History

4.3.4 Power Supply

The AM64x SKEVM uses one PMIC and three discrete regulators to supply the necessary voltage and power to the SoC, various memories, Wilink module, and other peripherals on the board. Probe points for power supplies provided on the SKEVM Board are mentioned in Table 4-4.

Table 4-4 Power Test Points
Points on Bottom Side
SI. No Power Supply Probe Point Ground Probe Point Expected Voltage (V)
1 VUSB_MAIN TP28 DGND J3.2 5
2 XDS_USB_VBUS TP75 DGND J3.2 5
3 VCC_3V3_SYS TP80 DGND J3.2 3.3
4 VDDAR_CORE TP85 DGND J3.2 0.85
5 VPP_1V8 TP89 DGND J3.2 0
6 VDD_CORE TP81 DGND J3.2 0.75
7 VDD_LPDDR4 TP83 DGND J3.2 1.1
8 VDD_1V0 TP88 DGND J3.2 1
9 VCC1V8 TP82 DGND J3.2 1.8
10 VDD_PHY_2V5 TP87 DGND J3.2 2.5
11 VDDSHV_SD_IO_PMIC TP84 DGND J3.2 3.3
12 VDD_MMC1 C47.1 DGND J3.2 3.3
13 VBUS_USB_CP2105 TP76 DGND J3.2 5
14 VCC3V3_XDS TP74 DGND J3.2 3.3
15 VDDSHV_SD_IO TP15 DGND J3.2 3.3
Points on Top Side
16 VCC3V3SYS_EXT TP78 DGND J3.2 3.3
17 VDDA_1V8 TP86 DGND J3.2 1.8
18 VCC3V3_TA C340.1 DGND J3.2 3.3
19 VCC3V3_TA_XDS C421.1 DGND J3.2 3.3

Table 4-5 gives details about power-good LEDs provided on SKEVM board to give users positive confirmation of the status of each supply.

Table 4-5 Power LEDs
SI.No Power Supply LED Part Reference
1 VCC3V3SYS_EXT LD2
2 VCC_3V3_SYS LD16
3 VDDAR_CORE LD16
4 VDDA_1V8 LD16
5 VDD_LPDDR4 LD16
6 VDD_CORE LD16
7 VCC1V8 LD16
8 VDDSHV_SD_IO_PMIC LD16
9 VDD_PHY_2V5 LD16
10 VDDA_1V8 LD16
11 VDD_CP2105 LD18