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

2.10.1.3 MMC0 Interface

The AM275x SoC features a single MMC0 port (MMC0). MMC0 can be routed to either an eMMC Flash (MTFC32GAZAQHD-IT) or a Micro SD Card connector (MEM2052-00-195-00-A) through a 1:2 FET Switch (TS3DDR3812RUAR). MMC0 routing direction is determined by the MMC0_SEL_3V3 signal tied to the SELx pins of the FET Switch. MMC0_SEL_3V3 signal state (High or Low) is controlled by SW9 as shown in Figure 2-19.

Table 2-15 MMC0 Routing Truth Table
MMC0_SEL_3V3 MMC0 VDDSHV5 IO Voltage SW9 Position
0 Micro SD interface 3.3V ON
1 eMMC interface 1.8V OFF

The AM275x EVM features a 32GB eMMC Flash memory (MTFC32GAZAQHD-IT), to which MMC0 can be routed to when SW9 (Figure 2-19) is OFF.

The eMMC Flash is a communication and mass data storage device that includes a Multimedia Card (MMC) interface and a NAND Flash component.

The AM275x SoC MMC0 Interface supports High Speed Double Data Rates (DDR) up to 50MHz or 100MBps when routed to the eMMC Flash. The AM275x EVM features the option to populate external pull-up resistors on data lines eMMC0_D[1:7] to prevent bus floating. A series resistor close to the AM275X SoC is provided for the clock signal MMC0_CLK for signal integrity.

The eMMC Flash is powered by 3.3V (VCC_3V3_SYS) for NAND Memory and 1.8V (VCC1V8_SYS) for the eMMC Interface. The MMC0 I/O group is powered by the VDDSHV5 power domain, which is connected to 1.8V IO supply (SW9 OFF).

The eMMC Flash requires an active low reset from the host. By default, the hardware reset function is temporarily disabled in the eMMC Flash. The host must set ECSD register byte 162, bits [1:0] to 0x1 to enable this functionality before the host can use it. External Reset is provided by ANDing RESETSTATz from the AM275x SoC, and the eMMC specific reset signal GPIO_eMMC_RSTn from the 1.8V I/O Expander.

AM2754, AM2754-Q1, AM2752, AM2752-Q1 eMMC Interface Block Diagram Figure 2-23 eMMC Interface Block Diagram

Additionally, MMC0 can be routed to a Micro SD card connector (MEM2052-00-195-00-A) when SW9 (Figure 2-19) is ON.

The AM275x SoC MMC0 Interface supports Ultra High-Speed Phase I (UHS_I) operation when routed to the Micro SD card.

The Micro SD card interface is set to operate in SD mode by default. For high-speed cards, the ROM Code of the AM275x SoC attempts to find the fastest speed that the card and the controller can support, then transition to 1.8V I/O through the VSEL_SD_SoC signal from the AM275x SoC.

AM2754, AM2754-Q1, AM2752, AM2752-Q1 Micro SD Card Interface Block Diagram Figure 2-24 Micro SD Card Interface Block Diagram