SPRUJE8C December   2024  – June 2025 AM2752-Q1 , AM2754-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Preface Read This First
      1. 1.2.1 Important Usage Notes
    3. 1.3 Kit Contents
    4. 1.4 Device Information
      1. 1.4.1 Security
    5. 1.5 Audio Expansion Connectors
  6. 2Hardware
    1. 2.1  Component Identification
    2. 2.2  Power Requirements
      1. 2.2.1 Power Input Using USB Type-C Connector
      2. 2.2.2 Power Status LEDs
      3. 2.2.3 Power Tree
      4. 2.2.4 Power Sequence
      5. 2.2.5 PMIC
    3. 2.3  Reset
    4. 2.4  Clock
    5. 2.5  Boot Mode Selection
    6. 2.6  Header Information
    7. 2.7  Push Buttons
    8. 2.8  Switches
    9. 2.9  GPIO Mapping
    10. 2.10 Interfaces
      1. 2.10.1  Memory Interface
        1. 2.10.1.1 OSPI Interface
        2. 2.10.1.2 Board ID EEPROM
        3. 2.10.1.3 MMC0 Interface
        4. 2.10.1.4 HYPERRAM
      2. 2.10.2  Ethernet Interface
        1. 2.10.2.1 Ethernet Add-on Connectors
      3. 2.10.3  Audio Interfaces
        1. 2.10.3.1 Audio Clocking
        2. 2.10.3.2 McASP
        3. 2.10.3.3 MLB
      4. 2.10.4  I2C Interface
      5. 2.10.5  SPI
      6. 2.10.6  UART
      7. 2.10.7  MCAN
      8. 2.10.8  JTAG
      9. 2.10.9  USB
      10. 2.10.10 ADC
    11. 2.11 AEC Mapping
      1. 2.11.1 Audio Expansion Connector 1
      2. 2.11.2 Audio Expansion Connector 2
    12. 2.12 Test Points
  7. 3Hardware Design Files
  8. 4Additional Information
    1. 4.1 If You need Assistance
    2. 4.2 Trademarks
    3. 4.3 Rev. E2 Design Changes
  9. 5References
    1. 5.1 Reference Documents
    2. 5.2 Other TI Components Used This Design
  10. 6Revision History

2.10.8 JTAG

The AM275x EVM features an XDS110 class on-board JTAG emulation IC (TM4C1294NCPDTT3R). The XDS110 class on-board JTAG emulator connects to a Micro-B USB 2.0 Connector (J17). The XDS_USB_VBUS signal from the USB connector powers the XDS110 such that connection to the XDS110 JTAG emulator is not lost when the AM275x EVM Power is removed. Voltage translation buffers are used to isolate the XDS110 JTAG emulator from the rest of the EVM.

Optionally, The AM275x EVM features a 20-pin Standard JTAG cTI Header (J19). This gives the option to connect the AM275x EVM to an external JTAG emulator through a JTAG emulator cable. Voltage translation buffers are used to isolate the JTAG signals of cTI header from the rest of the AM275x EVM.

Table 2-22 cTI JTAG Header Pinout
Pin Number Signal
1 JTAG_TMS
2 JTAG_TRST#
3 JTAG_TDI
4 JTAG_TDIS
5 VCC_3V3_SYS
6 NC
7 JTAG_TDO
8 SEL_XDS110_INV
9 JTAG_cTI_RTCK
10 DGND
11 JTAG_cTI_TCK
12 DGND
13 JTAG_EMU0
14 JTAG_EMU1
15 JTAG_EMU_RSTn
16 DGND
17 NC
18 NC
19 NC
20 DGND

The JTAG signal outputs of the translation buffers from the XDS110 Section and the cTI Header Section are muxed and connected to the AM275x SoC JTAG Port. If a connection to the cTI 20 Pin JTAG connector is sensed using an automatic presence-detect circuit, the MUX routes the 20 pin signals from the cTI connector to the AM275x SoC in place of the on-board JTAG emulator.

AM2754, AM2754-Q1, AM2752, AM2752-Q1 JTAG Interface Block Diagram Figure 2-36 JTAG Interface Block Diagram