WT9932P4C61-TINY Feature Introduction

Note: The MIPI CSI/DSI interfaces use Raspberry Pi pin order. Carefully check the FPC direction and pin order before connecting a display or camera.

1. Introduction

WT9932P4C61-TINY is a mini development board designed for lightweight IoT development. It is based on Espressif ESP32-P4 + ESP32-C61 chips and uses the Wireless-Tag WT01P461-S1 module. With a compact 33 x 69 mm form factor, the board combines high-performance processing, wireless connectivity, and rich peripheral expansion. It is suitable for smart home products, low-power IoT terminals, HMI development, image display, and camera application validation.

The ESP32-P4 on the board runs at up to 400MHz and is suitable for display, image, USB, and general peripheral control tasks. The ESP32-C61 provides Bluetooth and Wi-Fi 6 dual-mode wireless communication. For hardware development, the board brings available pins out to 2.54mm pin headers for breadboard prototyping, and integrates serial flashing, an RGB indicator, EN and BOOT buttons, and a power indicator. The power section uses a DCDC design and supports up to 2A output current for stable peripheral power.

1.1 Core Hardware Configuration

• Core module: Wireless-Tag WT01P461-S1 module.
• Main processor: ESP32-P4, up to 400MHz.
• Wireless coprocessor: ESP32-C61, supporting Bluetooth and Wi-Fi 6 dual-mode wireless communication.
• Peripheral expansion: Onboard MIPI CSI, MIPI DSI, MicroSD card slot, USB Serial/JTAG, and USB 2.0 OTG High-Speed interfaces.
• Pin headers: J3 and J4 dual-row 2.54mm pin headers expose available GPIO pins for breadboard or perfboard expansion.
• Debug resources: Onboard RESET button, BOOT button, and WS2812 RGB LED.
• Power design: Powered through USB Type-C, with onboard DCDC output up to 2A.
• Board size: 33 x 69 mm.

1.2 Design Features

1. Dual-chip combination: Combines the high-performance processing capability of ESP32-P4 with the wireless connectivity of ESP32-C61, balancing performance and cost.
2. Onboard RGB indicator: The WS2812 RGB LED is connected to IO51 and can be used for status indication and basic interaction tests.
3. Dual USB development interfaces: A USB Type-C cable can be used for P4 and C61 development and debugging.
4. EN and BOOT buttons: Onboard reset and download-mode buttons make it easy to manually enter flashing mode.
5. Breadboard-friendly spacing: The pin headers use 2.54mm pitch for prototyping and peripheral expansion.
6. MIPI CSI/DSI interfaces: Camera and display interfaces use Raspberry Pi compatible pin order for display and image capture validation.
7. Onboard MicroSD card slot: Supports a four-line MicroSD card interface for file systems, media resources, and data logging.

2. Hardware Peripherals

2.1 Component Introduction

2.2 Interface Footprints

3. Pin Description

3.1 J1 MIPI DSI FPC

J1 is the MIPI DSI FPC interface, using 1.0mm pitch, 15Pin, drawer type, bottom contact, and horizontal mounting. Pay attention to the FPC pin order when using it.

3.2 J2 MIPI CSI FPC

J2 is the MIPI CSI FPC interface, using 1.0mm pitch, 15Pin, drawer type, single-sided contacts, and vertical mounting. Pay attention to the FPC pin order when using it.

3.3 J9, J10 USB Type-C Interfaces

J9 and J10 are USB 2.0 Type-C interfaces and can be used for firmware download and power supply. J9 is a full-speed USB 2.0 interface with a maximum theoretical speed of 12Mbps, using IO24 and IO25. J10 is a high-speed USB 2.0 interface with a maximum theoretical speed of 480Mbps, using dedicated USB pins.

3.4 J11 MicroSD Card Interface

J11 is a push-push MicroSD card interface. Its power supply uses LDO_VO4, which can be configured to support 1.8V. Pull-ups also use LDO_VO4.

Note: Refer to the schematic and the official pin definition for the final MicroSD signal definitions.

3.5 J3, J4 Pin Header Interfaces

J3 and J4 are common 2.54mm pitch pin header interfaces.

J3 pin definition:

J4 pin definition:

Note: After reset, the strapping pin levels determine whether the board enters download mode.

Note: The TX0, RX0, EN, and BOOT signals of the C61 in the module are connected on the development board to C61 pins 53, 54, 52, and 2 respectively.

4. Power Characteristics

The WT9932P4C61-TINY development board can be powered through a USB Type-C cable, and can also be connected to a computer USB port during debugging.

• Use a good-quality USB-C cable to ensure stable power supply.
• If the board is powered from a computer USB port, the port should provide at least 5V@1A.
• A 5V/1A or higher power adapter is recommended.
• The board power section uses a DCDC design and supports up to 2A output current.
• When J10 is used as a USB Host, it can provide up to 500mA externally.
• The 3.3V pins on the headers are power outputs. Do not use them as 3.3V inputs.
• The MicroSD interface power uses LDO_VO4, which can be configured to support 1.8V.

If the UART connection appears and disappears after connecting FUSB, try holding the BOOT button, pressing the RESET button, and then releasing BOOT to manually enter download mode.