SPRADP6A February   2025  – May 2025 AM2612 , AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Power Net Checks
    1. 2.1 Verify Proper AM26x Power Rail Voltage Levels
    2. 2.2 Verify Maximum Current Loading
    3. 2.3 AM26x Power Sequencing
    4. 2.4 AM26x Power Topology References
  6. 3Device Boot Status
    1. 3.1 AM26x SOP Pin Status
    2. 3.2 SOP Boot Mode Latch Timing
    3. 3.3 AM26x SOP Pin Isolation
  7. 4Verify UART Output
    1. 4.1 Configure AM26x for UART Boot
    2. 4.2 Configure Host PC for UART Boot Validation
  8. 5Verify JTAG Connection
    1. 5.1 Configure AM26x for JTAG
    2. 5.2 Configure Host PC for JTAG Debug
    3. 5.3 Test the JTAG Connection
    4. 5.4 Connect to the AM26x R5F Core
  9. 6Loading and Executing a Code Example
    1. 6.1 Importing, Building, and Loading the Project
  10. 7Summary
  11. 8References
  12. 9Revision History

2.1 Verify Proper AM26x Power Rail Voltage Levels

Once the visual inspection is complete and no issues are identified, the PCB is ready for initial power-on. Once powered on, each critical voltage net for the AM26x device must be probed and verified to be within the recommended operating conditions. This is shown in Table 2-1.

Table 2-1 AM26x Power Nets - Recommended Operating Conditions
PARAMETER DESCRIPTION MIN NOM MAX UNIT
VDD SOC VDD Core Supply R5F = 400MHz 1.140 1.200 1.260 V
R5F = 500MHz1 1.188 1.250 1.320 V
VDDAR12, VDDAR2, VDDAR3 SRAM Array Supplies R5F = 400MHz 1.140 1.200 1.260 V
R5F = 500MHz1
VDDS18 1.8V IO Bias Supply from Bias LDO routed through board 1.710 1.800 1.890 V
VDDS33 3.3V IO Supply 3.135 3.300 3.465 V
VDDA18_OSC_PLL 1.8V Analog supply for PLL. Routed from the Analog LDO out through board 1.710 1.800 1.890 V
VDDA33 Analog 3.3V Supply 3.135 3.300 3.465 V
VDDA18 1.8V Analog supply. Routed from 1.8V Analog LDO out through Board 1.710 1.800 1.890 V
(1) AM261x devices of 'O' speed grade require 1.25V nominal core voltage regardless of the core frequency settings
(2) AM263x and AM263Px only