IMX477_Z1_LEGACY

IMX477 sensor board designed for motorized zoom lenses

• Overview
• Features
• Specifications
• FFC connector pin-out
• Dimensions
• Using with Raspberry Pi
• PCB revisions

Overview

Kurokesu IMX477 image sensor (1/2.3", 12.3MP) board with MIPI CSI-2 interface is designed to match motorized zoom lenses.

Features

• Sensor: IMX477
• Optical Format: 1/2.3″ (diagonal 7.857mm)
• Resolution: 4056(H) x 3040(V) 12.3MP
• Pixel Size: 1.55μm x 1.55μm
• Lane MIPI CSI-2
• Lens Mount: Board mount
• Multiple mounting options (designed to match motorized zoom lenses)
• 4 lanes routed to FFC connector

Specifications

 

Pixels	4056 H  x 3040 V
Sensor size	7.564 x 5.476 mm
Shutter	Electronic Rolling Shutter
Sensor pixel size	1.5μm x 1.5μm
Scan	Progressive
Rated power	2W max
Sensor	Sony IMX477-AACK
Weight	4g
Lens mount	Board mount
Operational temperature	TBD
Weight	30.5×37×4.17mm

FFC connector pin-out

IMX477 camera board has 22pin 0.5mm spaced pitch FFC connector 687122183722 from Würth Elektronik. Cable orientation is bottom (see notes on the PCB).

Pinout table

Pin nr	Signal	Note
1	GND
2	MIPI_D1_N
3	MIPI_D1_P
4	GND
5	MIPI_D2_N
6	MIPI_D2_P
7	GND
8	MIPI_CLK_N
9	MIPI_CLK_P
10	GND
11	MIPI_D3_N
12	MIPI_D3_P
13	GND
14	MIPI_D4_N
15	MIPI_D4_P
16	GND
17	SEN_PWR_2.8V	Sensor analog power supply
18	LED	Not used
19	GND
20	SCL
21	SDA
22	3.3V	Logic power supply

Connectivity with Raspberry PI compute module

Use 22pin 0.5mm pitch FFC cable like 687622050002 (5cm) / 687622100002 (10cm) from Würth Elektronik

TOP / BOT connector

Initially, we designed an IMX477 board to be used with Raspberry Pi CM4 IO board and selected 22pin 0.5mm pitch connector contacts facing BOTTOM. It was a direct connection from IMX477 to the CM4 IO board with non reversed FFC cable.
We have replaced the connector facing the TOP side to be more flexible. It allows the same connection to CM4 IO board with reversed FFC cable. Also, standard 22pin 0.5mm to 15pin 1.0mm cables can be used to attach to more boards like NVIDIA Jetson, or other modifications of the Raspberry Pi compute modules.

Dimensions

3D model is maintained in our official GitHub repository

Using with Raspberry Pi

Raspberry Pi CM4 compute module

Quick guide how to use camera module with Raspberry Pi compute module and IO board. Raspberry Pi software is in active development thus changes fairly quickly. We will touch preparation procedure very briefly.

Only compute modules support cameras without crypto chip.

Prepare board

• Fit jumpers J2 - disable EMMC boot
• Fit jumpers J6 - enable CAM0, DISP0
• Connect camera co CAM1 port

Install OS

• Install rpiboot
• Start rpiboot
• Use rpi-imager to flash OS

Boot

• Remove J2 jumper - disable EMMC boot
• Scan for IP on local network
• Connect monitor and keyboard, finish setup
• Expand system

Prepare camera

• Setup single camera mode

sudo wget https://datasheets.raspberrypi.org/cmio/dt-blob-cam1.bin -O /boot/dt-blob.bin
sudo reboot

• Check if camera is detected after reboot

vcgencmd get_camera

Recipe #1 - show video in console as ASCII text

raspivid -t 0 -o - | gst-launch-1.0 fdsrc ! h264parse ! rtph264pay config-interval=1 pt=96 ! decodebin ! videoconvert ! aasink

Recipe #2 - stream video over network

• Start streaming on Raspberry Pi

raspivid -o - -t 9999999 |cvlc -vvv stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264

• Start client on Windows computer (change Raspberry Pi IP address to match your setup)

set PATH=C:\gstreamer\1.0_1.18.3\bin\;C:\gstreamer\1.0_1.18.3\lib\gstreamer-1.0\;C:\gstreamer\1.0_1.18.4\libexec\gstreamer-1.0\
gst-launch-1.0 rtspsrc location=rtsp://192.168.0.86:8554/ latency=10 ! decodebin ! timeoverlay ! videoscale ! videoscale ! video/x-raw,width=1280,height=720 ! autovideosink

Demo video with 40x motorized zoom lens

For more details check blog post

PCB revisions

RevA

• Proof of concept

RevB

• Route 4 MIPI lines
• Add lens holes

RevC

• Cleanup design
• Replace LDO with ones that can be purchased