Functional Description - Espressif ESP-WROVER-KIT Getting Started Manual

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3.
Table 3-1 provides the functional description of the modules/interfaces that are featured on
the ESP-WROVER-KIT.
Interface/Module
32.768 KHz
ESP32 Module
CTS/RTS
UART
JTAG
FT2232
Boot
USB
Espressif

Functional Description

Table 3-1. ESP-WROVER-KIT Functional Description
An external precision 32.768 KHz crystal oscillator provides the chip with a clock of
low-power consumption during the Deep-sleep mode.
ESP-WROVER-KIT is compatible with both ESP-WROOM-32 and ESP32-WROVER.
The ESP32-WROVER module features all the functions of ESP-WROOM-32 and
integrates an external 32-MBit PSRAM for flexible extended storage and data
processing capabilities.
⚠ Note:
GPIO16 and GPIO17 are used as the CS and clock signal for PSRAM. To ensure
reliable performance, the two GPIOs are not led out.
Serial port flow control signal: the pin is not connected to the circuitry by default. To
enable it, JP14 must be shorted by a jumper.
Serial port: the serial signals on FT2232HL and ESP32 are led to the two sides of
JP11. By default, the two signals are connected by a jumper. To use the ESP32
module serial interface only, the jumper may be removed and the module can be
connected to another external serial device.
SPI interface: the SPI interface connects to an external flash (PSRAM). To interface
SPI another SPI device, an extra CS signal is needed. If an ESP32-WROVER is being
used, please note that the electrical level on the flash and SRAM is 1.8V.
JTAG interface: the JTAG signals on FT2232HL and ESP32 are led to the two sides
of JP8. By default, the two signals are disconnected. To enable JTAG, shorting
jumpers are required on the signals.
FT2232 chip is a multi-protocol USB-to-serial bridge. The FT2232 chip features USB-
to-UART and USB-to-JTAG functionalities. Users can control and program the
FT2232 chip through the USB interface to establish communication with ESP32.
The embedded FT2232 chip is one of the distinguishing features of the ESP-
WROVER-KIT. It enhances users' convenience in terms of application development
and debugging. In addition, uses do not need to buy a JTAG debugger separately,
which reduces the development cost. The schematics are shown in Figure 3-1.
EN Reset button: pressing this button resets the system.
Boot button: holding down the Boot button and pressing the EN button initiates the
firmware download mode. Then users can download firmware through the serial port.
USB interface. It functions as the power supply for the board and the communication
interface between PC and ESP32 module.
Description
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3. Functional Description
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