Datasheet

 Bottom side
3.2. Introduction to Functions
3.2.1. The Working Mode of USB Bridge
ESP-Prog uses FT2232HL, which is provided by FTDI, as its USB Bridge Controller chip. The board can
be configured to convert the USB 2.0 interface to serial and parallel interfaces that support a wide
range of industry standards. ESP-Prog uses FT2232HL's default dual-asynchronous serial interface
mode, allowing users to use the board easily by installing the FT2232HL driver on their PCs.
Note: The PC is able to identify the ESP-Prog's two ports by their port numbers. The bigger port
number represents the Program interface, while the other one represents the JTAG interface.
3.2.2. Communication Interface
ESP-Prog can connect to ESP32 user boards, using both the Program interface and the JTAG
interface. Users should connect the user board interfaces in a way that corresponds to the ESP-Prog
board.
 Program Interface
The Program interface has six pins, including the UART interface (TXD, RXD), boot mode
selection pin (ESPIO0) and reset pin (ESPEN). The design for the Program interface on the
user board should follow the reference provided in the figure below.