SPRUJA1 October   2023

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  Additional Images
    2. 2.2  Key Features
      1. 2.2.1 Processor
      2. 2.2.2 Power Supply
      3. 2.2.3 Memory
      4. 2.2.4 JTAG/Emulator
      5. 2.2.5 Support Interfaces and Peripherals
      6. 2.2.6 Expansion Connectors/Headers
    3. 2.3  Interface Mapping
    4. 2.4  Power ON/OFF Procedure
      1. 2.4.1 Power ON Procedure
      2. 2.4.2 Power OFF Procedure
      3. 2.4.3 Power Test Points
    5. 2.5  Clocking
      1. 2.5.1 Peripheral Ref Clock
    6. 2.6  Reset
    7. 2.7  CSI Interface
    8. 2.8  Audio Codec Interface
    9. 2.9  HDMI Display Interface
    10. 2.10 JTAG Interface
    11. 2.11 Test Automation Header
    12. 2.12 UART Interface
    13. 2.13 USB Interface
      1. 2.13.1 USB 2.0 Type A Interface
      2. 2.13.2 USB 2.0 Type C Interface
    14. 2.14 Memory Interfaces
      1. 2.14.1 OSPI Interface
      2. 2.14.2 MMC Interfaces
        1. 2.14.2.1 MMC0 - eMMC Interface
        2. 2.14.2.2 MMC1 - Micro SD Interface
        3. 2.14.2.3 MMC2 - M.2 Key E Interface
      3. 2.14.3 Board ID EEPROM
    15. 2.15 Ethernet Interface
      1. 2.15.1 CPSW Ethernet PHY 1 Default Configuration
      2. 2.15.2 CPSW Ethernet PHY 2 Default Configuration
    16. 2.16 GPIO Port Expander
    17. 2.17 GPIO Mapping
    18. 2.18 OLDI Display Interface
    19. 2.19 Power
      1. 2.19.1 Power Requirements
      2. 2.19.2 Power Input
      3. 2.19.3 Power Supply
      4. 2.19.4 Power Sequencing
      5. 2.19.5 AM62x SIP SoC Power
      6. 2.19.6 Current Monitoring
    20. 2.20 EVM User Setup/Configuration
      1. 2.20.1 EVM DIP Switches
      2. 2.20.2 Boot Modes
      3. 2.20.3 User Test LEDs
    21. 2.21 Expansion Headers
      1. 2.21.1 PRU Connector
      2. 2.21.2 User Expansion Connector
      3. 2.21.3 MCU Connector
    22. 2.22 Interrupt
    23. 2.23 I2C Address Mapping
  8. 3Hardware Design Files
  9. 4Compliance Information
    1. 4.1 Compliance and Certifications
  10. 5Additional Information
    1. 5.1 Trademarks

2.12 UART Interface

The four UART ports of the SoC (MCU UART0, WKUP UART0, SoC UART0 and SoC UART1) provided by the AM62x SIP are interfaced with an FTDI FT4232HL for UART-to-USB functionality and terminated on a USB micro-B connector (J15) on board. When the AM62x SIP SKEVM 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 is bus powered.

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

Table 2-7 UART Port Interface
UART Port USB to UART Bridge USB Connector COM Port
SoC_UART0 FT4232HL J15 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 and takes the configuration file from the external SPI EEPROM connected to the FT4232 chip. The EEPROM (93LC46B) supports 1Mbit/s clock rate. The EEPROM is programmable in-circuit over USB using a utility program called FT_PROG available from the FTDI 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-20231006-SS0I-JMPZ-Z0MG-SCK6V1W002PC-low.png Figure 2-12 UART Interface