SPRUIW7A October 2020 – February 2022
Three main domain UART ports of the SoC are interfaced with FT4232H for UART-to-USB functionality and terminated on a micro B connector (J44) provided on the CPB. When the EVM is connected to a Host using the provided USB cable, the computer can establish a Virtual Com Port which can be used with any terminal emulation application. The FT4232H is bus powered. Virtual Com Port drivers for the FT4232H can be obtained from https://www.ftdichip.com/Products/ICs/FT4232H.htm.
Out of Three UART ports, one UART port (UART0) is supports RS232 with Hardware flow control.
MCU and WKUP UART ports of the SoC are interfaced with FT2232H for UART-to-USB functionality and terminated on a micro B connector (J43) provided on the CPB. When the EVM is connected to a Host using the provided USB cable, the computer can establish a Virtual Com Port which can be used with any terminal emulation application. The FT2232H is bus powered. Virtual Com Port drivers for the FT4232H can be obtained from https://www.ftdichip.com/Products/ICs/FT2232H.html.
RS232 hardware control feature is supported on MCU UART0.
Both FT2232H and FT4232H circuits powered through USB VBUS. Since the circuits are powered through BUS power, the connection to the COM port will not be lost when the EVM power is removed. The maximum length of the IO cables should not exceed 3 meters.
UART Port | FTDI Bridge | USB Connector | COM Port | Remarks |
---|---|---|---|---|
MAIN_UART0 | FT4232H | J44 | COM 1 | Supports Hardware Flow control |
MAIN_UART1 | COM 2 | |||
MAIN_UART3 | COM 3 | |||
NA | COM 4 | NA | ||
MCU_UART0 | FT2232H | J43 | COM 5 | Supports Hardware Flow control |
WKUP_UART0 | COM 6 |
The EEPROM of FTDI bridges are programmed with the CPB serial number, which makes it easier for users to identify the connected COM port with the board serial number when one or more boards connected to the computer.
Example Programming content:
FT4232H (Main)
CPB Serial number: 14197900028
Programmed Serial number on FT4232H EEPROM: 141979000280A
FT2232H (MCU and WKUP)
CPB Serial number: 14197900028
Programmed Serial number on FT4232H EEPROM: 141979000280B