SPRUIJ9C April   2018  – October 2025

 

  1.   1
  2. 1Read This First
    1. 1.1 About This Manual
    2. 1.2 Related Documentation From Texas Instruments
  3.   Trademarks
  4.   6
  5. 2AM5724x Industrial Development Kit (IDK) Evaluation Module (EVM) Hardware
    1. 2.1  Introduction
      1. 2.1.1 Description
      2. 2.1.2 REACH Compliance
      3. 2.1.3 System View
    2. 2.2  Functional Description
      1. 2.2.1 Processor
      2. 2.2.2 Clocks
      3. 2.2.3 Reset Signals
    3. 2.3  Power Supplies
      1. 2.3.1 Power Source
      2. 2.3.2 TPS6590379 PMIC
      3. 2.3.3 AVS Control
      4. 2.3.4 Other Power Supplies
    4. 2.4  Configuration/Setup
      1. 2.4.1 Boot Configuration
      2. 2.4.2 I2C Address Assignments
      3. 2.4.3 SEEPROM Header
      4. 2.4.4 JTAG Emulation
    5. 2.5  Memories Supported
      1. 2.5.1 DDR3L SDRAM
      2. 2.5.2 SPI NOR Flash
      3. 2.5.3 Board Identity Memory
      4. 2.5.4 SD/MMC
      5. 2.5.5 eMMC NAND Flash
    6. 2.6  Ethernet Ports
      1. 2.6.1 100Mb Ethernet Ports on PRU-ICSS
      2. 2.6.2 Gigabit (1000Mb) Ethernet Ports
    7. 2.7  USB Ports
      1. 2.7.1 Processor USB Port 1
      2. 2.7.2 Processor USB Port 2
      3. 2.7.3 FTDI USB Port
    8. 2.8  PCIe
    9. 2.9  Video Input and Output
      1. 2.9.1 Camera
      2. 2.9.2 HDMI
      3. 2.9.3 LCD
    10. 2.10 Industrial Interfaces
      1. 2.10.1 Profibus
      2. 2.10.2 DCAN
      3. 2.10.3 RS-485
    11. 2.11 User Interfaces
      1. 2.11.1 Tri-color LEDs
      2. 2.11.2 Industrial Inputs
      3. 2.11.3 Industrial Outputs / LEDs
    12. 2.12 Pin Use Description
      1. 2.12.1 Functional Interface Mapping
      2. 2.12.2 GPIO Pin Mapping
    13. 2.13 Board Connectors
    14. 2.14 EVM Important Notice
  6. 3Known Deficiencies in AM5724x IDK EVM
    1. 3.1  Power solution not sufficient for full PCIe plug-in card compliance
    2. 3.2  AM574x IDK EVM does not support eMMC HS200 mode
    3. 3.3  PCIe PERSTn line not in proper state at start-up
    4. 3.4  EDIO connectors J4 and J7 should support real-time debugging for both PRU1 and PRU2
    5. 3.5  HDQ implementation not correct
    6. 3.6  Removing the power plug and inserting it again while the power supply is energized may cause damage
    7. 3.7  Software shutdown of PMIC not operational
    8. 3.8  PMIC implementation does not support required SOC shut-down sequence
    9. 3.9  USB port providing UART console and XDS100 emulation not isolated from EVM board supplies
    10. 3.10 Need 47-µf capacitor at camera header
    11. 3.11 Decoupling capacitors do not reflect AM574x PDN recommendations
    12. 3.12 CCS System Reset fails
    13. 3.13 AM574x IDK EVM design contains 2 clamp circuits that may not be necessary
    14. 3.14 Crystal connected to osc0 needs to have 50 ppm or better long term accuracy
    15. 3.15 Software must program the CDCE913 for 0-pf load capacitance
    16. 3.16 PHY address LSB for U9 and U15 can be latched incorrectly
  7. 4Revision History

2.2.3 Reset Signals

The AM574x processor contains 3 reset inputs and an output indicating a reset is in progress. The reset pins are:

  • PORz: PORz is a hard reset that resets everything including emulation logic. It also tri-states most outputs.
  • RESETn: RESETn is a device reset commonly driven by control logic or emulation.
  • RTC_PORz: Separate PORz for the RTC module that must be driven at the same time as PORz. (Note that PORz and RTC_PORz can only be directly connected as long as VDDSHV3 and VDDSHV5 are driven at the same voltage.)
  • RSTOUTn: Output signal from SOC indicating that the device has entered reset. This is used to reset other circuits that must be reset at the same time as the processor.

More details about the behavior of these reset pins within the AM574x processor can be found in the AM574x Sitara Processors Silicon Revision 1.0 Data Manual (SPRS982). There are push buttons on the IDK that can initiate either a RESETn or PORz input. SW1 can drive PORz active (low) and SW2 can drive RESETn active (low).

There is a device erratum in all of the AM574x devices that prevents use of RESETn independent from PORz. The workaround is to generate PORz whenever a device reset occurs even if it is from an internal initiator. This is accomplished through cooperation with the PMIC paired with the AM574x device on the IDK EVM. The RSTOUTn output from the AM574x device is connected to the NRESWARM input of the PMIC. This initiates a re-start that drives RESET_OUT low and resets all voltages to their initial values. Since RESET_OUT from the PMIC is connected to PORz in the AM574x device, a hard reset is forced on the SOC that meets the needs of the erratum workaround.

The AM574x IDK EVM is started by pressing the start-up push button, SW3. The POWERHOLD input can be connected to VRTC_OUT in customer designs to cause the board to power-on as soon as the main supply is stable.

The configuration of the PMIC to provide RESET_OUT from the NRESWARM input creates an always-on implementation. This always-on mode of operation prevents software shut-down of the IDK. Customer designs should have power-good monitoring circuitry such as a TPS3808 connected to the main supply to the PMIC that is connected to the PMIC RESET_IN. The TPS3808 can detect the main supply voltage dropping and then trigger the PMIC to execute a controlled shut-down that meets the requirements in the AM574x Sitara Processors Silicon Revision 1.0 Data Manual (SPRS982).