C792

C792 front view

C792 rear view

C792

C792

C792

Important Notice

• This product is designed for advanced Raspberry Pi users and may not be suitable for beginners.
• The Raspberry Pi 5 lacks hardware-accelerated H.264 encoding, resulting in lower image capture performance than the Pi 4B and high CPU usage at 1080p
• For stable operation, we strongly recommend powering the module separately via the 5V power port.

Overview

The C792 is an HDMI-to-MIPI CSI-2 converter module with HDMI loop out and I2S audio output support.

HDMI Input: Supports up to 4K@60Hz, and the HDMI loop-out outputs the same content synchronously as the input.

CSI-2 Output: Supports up to 1080p@60Hz (4K input is automatically downscaled to 1080p while keeping the refresh rate).

Working Principle

The module's hardware architecture consists of the GSV2001 and TC358743: The GSV2001 handles HDMI signal splitting (one channel for loop‑out display, the other to the TC358743 for processing), and the TC358743 performs HDMI‑to‑CSI‑2 conversion.

HDMI Loop‑out

*When a monitor is connected: The HDMI source detects the physical display.

*When NO monitor is connected: The source detects a virtual display (EDID) emulated by the TC358743.

CSI‑2 Interface

*15‑pin: 2 data lanes, for Raspberry Pi Zero / 3B / 4B, up to 1080p@50Hz

*22‑pin: 4 data lanes, for Raspberry Pi CM4 / CM5 / 5B, up to 1080p@60Hz

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Geekworm HDMI to CSI Module Series:

Convert HDMI signal acquisition into CSI signal and I2S audio signal. The maximum capture resolution depends on the HDMI to CSI converter board as well as the Raspberry Pi hardware.

Raspberry Pi hardware are primarily divided into two series, one supporting a maximum of 1080P@60Hz and the other supporting a maximum of 1080P50Hz.

• Raspberry Pi versions that support up to 1080P60Hz: CM3, CM4, Pi 5B
• Raspberry Pi versions that support up to 1080P50Hz: zero, zero2, Pi3B, Pi4B, etc.

Picture	Model	Description	Max Input Resolution	Matching Case	I2S Audio	HDMI Capture Chip	PCB Dimension	CSI-2 Connector	Supported SOC
	C790	HDMI to CSI-2	1080p@60fps	None	Yes with 1 x I2S cable (15cm length)	Toshiba TC358743XBG	30 x 45 mm	15-PIN FPC (pitch 1.0 mm) on the front of C790 22-PIN FPC (pitch 0.5 mm) on the rear of C790	Pi 5B / 4B / 3B+ / 3B / 3A+ / Zero / Zero W/ Zero 2W / CM3 / CM4
	C792	HDMI to CSI-2 with HDMI OUT loop	1080P@60Hz for Pi 5B, CM4, CM3, 1080P@50Hz for zero, zero2, Pi3B, Pi4B	None	Yes with 1 x I2S cable (15cm length)	Toshiba TC358743XBG	56 x 56 mm	15-PIN FPC (pitch 1.0 mm) on the front of C792 22-PIN FPC (pitch 0.5 mm) on the rear of C792	Pi 5B / 4B / 3B+ / 3B / Zero / Zero W/ Zero 2W / CM3 / CM4
	X630	HDMI to CSI-2	1080p@50fps	X630-C1	Yes, but I2S wiring or the X1300-A2 accessory board is necessary	Toshiba TC358743XBG	30 x 42.4 mm	15-PIN FPC (pitch 1.0 mm)	4B / 3B+ / 3B / 3A+ / Zero W / Zero 2W
	X1300	HDMI RX to MIPI CSI-2-TX	1080p@60fps	X1300-C1	Yes, but I2S wiring or the X1300-A2 accessory board is necessary	Toshiba TC358743XBG	30 x 37.5 mm	22-PIN FPC (pitch 0.5 mm)	Pi 5B / CM4 IO
	X1301	HDMI RX to MIPI CSI-2-TX HDMI loop output	1080p@60fps	X1301-C1	Yes	Toshiba TC358743XBG	57 x 85.5 mm	22-PIN FPC (pitch 0.5 mm)	Pi 5B / 4B / 3B / 3B+ / 3A+ / CM4 IO
	C779	HDMI to CSI-2	1080p@50fps	None	NO	Toshiba TC358743XBG	35 x 50 mm	15-PIN FPC (pitch 1.0 mm)	Pi 5B / 4B / 3B+ / 3B / 3A+ / Zero / Zero W/ Zero 2W
	X1300-A2	I2S audio accessory board for X630 / X1300	1080p@60fps	None	This is a I2S audio accessory board	-	57 x 65 mm	-	work with X1300 HDMI to CSI-2 for Raspberry Pi 5B, CM4 IO board work with X630 HDMI to CSI-2 for Raspberry Pi 4B, 3B+ and 3B

Hardware Parameters

• Model: C792
• Compatible with: Raspberry Pi 5B/4B/3B/Zero/CM5/CM4
• HDMI input: Raspberry Pi hardware is mainly divided into two series, supporting a maximum of either 1080P@60Hz or 1080P@50Hz

*Up to 1080P@60Hz: CM3, CM4, Pi 5B

*Up to 1080P@50Hz: Zero, Zero 2, Pi 3B, Pi 4B, etc.

• Size: 56 x 56 mm
• Power supply: 5V
• Weight: 25g

Packing List

• 1 x C792 HDMI to CSI-2 Module
• 1 x 5V power cable
• 1 x 15cm Length FPC 15pin 1.0mm cable (for Pi 4B / 3B / Pi Zero)
• 1 x 15cm Length FPC 22pin 0.5mm cable (for Pi 5B / CM5 / CM4)
• 1 x I2S cable

User Manual - C792 / C790 / C779 Software Demo

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Here are a few tutorials:

• Similar Products Guide: X1300 Software
• Tutorial from customers: RPi5_hdmi_in_card
• Due to the absence of hardware encoding on the Pi 5B, the software usage instructions for Pi platforms are currently divided into two sections: Pi 5B configuration and configuration for other Pi platforms.
• Pi 5B platforms HDMI to CSI module test demo reference： CSI Manual on Pi 5
• Possible software problems: ISP freezes with new firmware and Raspberry Pi 5 firmware ignores and responds with incorrect frame buffer pixel depth information
• Also refer to: https://wiki.blicube.com/blikvm/en/C792/

FAQ

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