SPRUJ66A February   2023  – December 2023

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1EVM Revisions and Assembly Variants
  5. 2Inside the Box
  6. 3EMC, EMI, and ESD Compliance
  7. 4System Description
    1. 4.1 Key Features
      1. 4.1.1 Processor
      2. 4.1.2 Power Supply
      3. 4.1.3 Memory
      4. 4.1.4 JTAG Emulator
      5. 4.1.5 Supported Interfaces and Peripherals
      6. 4.1.6 Expansion Connectors Headers to Support Application Specific Add On Boards
    2. 4.2 Functional Block Diagram
    3. 4.3 AM62A Low Power SK EVM Interface Mapping
    4. 4.4 Power ON/OFF Procedures
      1. 4.4.1 Power-On Procedure
      2. 4.4.2 Power-Off Procedure
      3. 4.4.3 Power Test Points
    5. 4.5 Peripheral and Major Component Description
      1. 4.5.1  Clocking
        1. 4.5.1.1 Peripheral Ref Clock
      2. 4.5.2  Reset
      3. 4.5.3  CSI Interface
      4. 4.5.4  Audio Codec Interface
      5. 4.5.5  HDMI Display Interface
      6. 4.5.6  JTAG Interface
      7. 4.5.7  Test Automation Header
      8. 4.5.8  UART Interface
      9. 4.5.9  USB Interface
        1. 4.5.9.1 USB 2 0 Type A Interface
        2. 4.5.9.2 USB 2 0 Type C Interface
      10. 4.5.10 Memory Interfaces
        1. 4.5.10.1 LPDDR4 Interface
        2. 4.5.10.2 OSPI Interface
        3. 4.5.10.3 MMC Interfaces
          1. 4.5.10.3.1 MMC0 - eMMC Interface
          2. 4.5.10.3.2 MMC1 - Micro SD Interface
          3. 4.5.10.3.3 MMC2 - M.2 Key E Interface
        4. 4.5.10.4 Board ID EEPROM
      11. 4.5.11 Ethernet Interface
        1. 4.5.11.1 CPSW Ethernet PHY Default Configuration
      12. 4.5.12 GPIO Port Expander
      13. 4.5.13 GPIO Mapping
      14. 4.5.14 Power
        1. 4.5.14.1 Power Requirements
        2. 4.5.14.2 Power Input
        3. 4.5.14.3 Power Supply
        4. 4.5.14.4 AM62A SoC Power
        5. 4.5.14.5 Current Monitoring
      15. 4.5.15 AM62A Low Power SK EVM User Setup and Configuration
        1. 4.5.15.1 Boot Modes
        2. 4.5.15.2 User Test LEDs
      16. 4.5.16 Expansion Headers
        1. 4.5.16.1 User Expansion Connector
        2. 4.5.16.2 MCU Connector
      17. 4.5.17 I2C Address Mapping
  8. 5Revision History

4.5.8 UART Interface

The four UART ports of the SOC (MCU UART0, WKUP UART0, SOC UART0 and SOC UART1) are interfaced with an FTDI Bridge FT4232HL for UART-to-USB functionality and then terminated on a USB micro-B connector (J17) on board. When the AM62A Low Power SK EVM is connected to a Host using USB cable, the computer can establish a Virtual COM Port which can be used with any terminal emulation application. The FT4232HL device is bus powered.

Since the circuit is powered through the USB BUS, the connection to the COM port will not be lost when the SKEVM power is removed.

Table 4-6 UART Interface
UART Port USB to UART Bridge USB Connector COM Port
SOC_UART0 FT4232HL J17 COM1
SOC_UART1 COM2
WKUP_UART0 COM3
MCU_UART0 COM4

The FT4232 chip is configured to operate in ‘Single chip USB to four channel UART’ mode using the configuration file from an external SPI EEPROM connected to it. The EEPROM (93LC46B) supports 1 Mbit/s clockrate. The EEPROM is programmable in-circuit over USB using a utility program called FT_PROG available from FTDI's web site. The FT_PROG is also used for programming the board serial number for users to identify the connected COM port with board serial number when one or more boards are connected to the computer.

GUID-20221013-SS0I-V2XD-9WDB-LZ8JK6FNZXHT-low.png Figure 4-17 UART Interface block diagram