

JTAG Interface

The design for the JTAG interface on the user board should follow the reference provided in

the figure below.



Fool-proof Design

The ESP-Prog board uses header connectors (DC3-6P / DC3-10P) which support reverse-

current circuitry protection. In such cases, it is recommended that users also use header

connectors on their user boards, such as FTSH-105-01-S-DV-* or DC3-*P.

Note: The flat cables used here are directional. Please use the cables provided by Espressif.

3.2.3. Automatic Downloading Function

ESP-Prog supports automatic downloading. After connecting the Program interface of ESP-Prog to

the user board, the downloading program can download data or run programs automatically by

controlling the states of the start-mode selection pin (ESPIO0) and reset pin (ESPEN), which spares

the users from manually restarting the device and selecting the downloading modes. The two

buttons on the ESP-Prog board enable users to reset and control the boot mode of the device

manually.

The schematics of the automatic downloading circuit is displayed below.