MAX9296/MAX96712 6-Channel GMSL1/2 expansion card
Features
The expansion card is based Dual-channel max9296 expansion card, capable of connecting 6 cameras:
Work with TI DEV boards(EVM and Starter-kit(SK))
MAX 6 cameras(Max9296: 2 cameras; MAX96712:4 cameras)
Use Max20087 to provide POC control, over voltage and current protection
Reserve fsync input
Other
Structure [3D Rendering]
Images
(Expansion card with SK board, installed in case)
(Work with EVM)
Description
User Notes
Power supply (Recommend): 12-16V, Maximum:20V, Minimum: 11V。
GMSL POC voltage: 9.6V.
Current limit setting resistor for max20087 is 82K。
Attention:external power and mainboard power can not be connected simutanousely
Installation and Power On
Install the exapansion card to EVM/SK board with screw and nuts we provided. The silk print test ”evm“, “sk” indicate which holes to use.
(Description based on SK board)
Installation
The distance between mainboard and expansion board is 5mm. place use copper spacers we provide (5mm length, M2.5)
Align QTH/QSH 40PIN B2B connector, press.
Align fixing holes.
Fasten screws.
Status of boards after installation, please refer:dual9296_sk_stack_v5_1.png
Wiring
The expansion board can be power with two methods:
Use mainboard TYPE-C port. (Use qualified power supply, QC standard, the output voltage should be 20V or 12V)
Use external power supply port(4pin XH2.54 wire to board connect)
Do not connect camera before you comfirm the power supply is normal.
Whichever method you choose, you need to short VMAIN jumper.
Power on
Connect camera Fakra cable, turn power supply on。
Test
Connect 4 cameras to max96712(1080p30, YUV422):
Connect 2 camera to max9296,4 cameras to max96712 (6 in total):
Driver of GMSL Camera
Test Applications
Together with the hardware, we provide a list of test application/drivers:
Attention: All applications provided are for test only。
When running the application, please be noted:
MAX96712 use internal fsync,will output fsync signal as a fsync master.
The MAX9296 GPIO0/MFP0 receives fsync signal and send to camera.
You will need to short MAX96712/MFP2 and MAX9296/MFP0, or will not be able to get video on HDMI display.
采购后,请与技术联系获取相关源代码。
注意事项
连接接相机之前,请先确认相机的供电电压。GMSL电源最大负载能力为 2A/9.6V。
使用外接电源(通过4PIN端子)时,请注意电源的正负极。
推推荐使用主板供电,即QTH/QSH端子的供电引脚
对于TDA4VM starter kit, 使用标准笔记本Type-C供电时,电压为20V左右
对于TDA4VM, TDA4VH 的 EVM (TI标准开发板),电压一般为 12V。
相机保护芯片MAX20087的电流设置电阻(PCB标注 RI)默认为82K。
max9296/max96712的IO电压为QSH的VCCIO,可以通过主板拨码开关,或者GPIO控制,可以为1.8V或3.3V。外接同步触发脉冲时注意输入电平。
拆装扩展板时,注意不要侧向用力,以免损坏QTH/QSH连接器。
编程时,注意控制GPIO的输入/输出。 需要将GPIO设置为合适状态,使得MAX9296/MAX96712处于非reset状态。
参考信息
问题排查 Q&A
1. 检测不到解串器
2. 检测不到串化器
3. 检测不到相机模组的CMOS或EEPROM
3. 配置都正常,不出图