A relatively rare night vision assistance system disassembled to see which automotive chips are used

Latest update time：2024-08-20

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With the continuous advancement of science and technology, various advanced auxiliary monitoring and intelligent systems have become popular in automobiles, greatly improving the safety and comfort of automobile driving. The night vision assistance system that uses infrared imaging technology to assist drivers in seeing the road, pedestrians and obstacles in the dark, reducing accidents and enhancing active safety is a driving assistance system that helps drivers improve nighttime driving safety.

This time we are disassembling the computer module of the second-generation night vision system produced by AutoLiv (AutoLiv, a well-known automotive safety system solution provider) for Audi, which is used in conjunction with their night vision (thermal imaging) camera. It can detect pedestrians in front of the car, display the thermal imaging image on the display screen on the dashboard, and highlight the pedestrians. (For the specific disassembly process, please visit the original post: https://www.eeworld.com.cn/aP8SejH )

Its outer shell is made of aluminum alloy, which can shield radiation very well, but there is no waterproof design inside. Waterproofing requires a plastic box on the outside.

After removing the shell, you can directly remove the mainboard. There is a TI DSP chip, TMS320DM642, on each side of the mainboard. In the middle is a XILINX XA3S500E automotive-grade FPGA.

On the back is a Freescale MC9S12XDT512, a 16-bit microcontroller.

DSP chips are relatively large

There are 2 DDR RAMs and a FLASH chip around the FPGA.

Next to the other DSP is an ADI ADV7179, an RGB to CVBS chip, which converts data into differential signal output via a TI LMH6643 and a dual FDW2501N dual-channel N-channel MOSFET in the upper right corner.

DS90C124 is an LVDS deserializer, which is used to convert the LVDS signal sent by the night vision camera through 2 lines into a TTL signal. After the data is collected by FPGA, it is sent to DSP for further image processing.

LM2904 is a 1A, 26V, high PSRR, low dropout regulator

The TPS5430 in the upper right corner is a 5.5V to 36V input 3A 500kHz buck converter, and the TPS54310PWPR in the lower left corner is a 3V to 6V input 3A synchronous buck converter

There are two 625033 printed on the board. I didn't find the specific model. It is certain that they are CAN transceivers. One of them communicates with the night vision camera and the other communicates with other buses of the car.

Below is an Infineon ITS428L2, a high-side power switch with integrated vertical power FETs that provides embedded protection and diagnostics.

IDT74FCT3807 is a clock driver with two crystal oscillators on the left.

The camera is connected using the HSD 4P interface

There are 2 Japanese ELNA electrolytic capacitors inside

Attached is a piece of data showing the communication between a night vision computer and a night vision camera. Because the ID saved in the night vision computer does not match that of the camera, they enter a repetitive question-and-answer mode after a difficult conversation (with comments).

ID: 0x657	DATA: 8B 03 22 02 00 FF FF FF
ID: 0x68B	DATA: 57 10 7B 62 02 00 00 00
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF
ID: 0x68B	DATA: 57 21 00 00 00 00 01 9C
ID: 0x68B	DATA: 57 22 00 15 BA F3 00 03
ID: 0x68B	DATA: 57 23 70 8A 00 00 00 00
ID: 0x68B	DATA: 57 24 00 00 00 00 00 00
ID: 0x68B	DATA: 57 25 00 00 00 00 00 00
ID: 0x68B	DATA: 57 26 00 02 D0 B4 00 03
ID: 0x68B	DATA: 57 27 CE 7F 00 00 0C 1B
ID: 0x68B	DATA: 57 28 00 00 00 43 FF FF
ID: 0x68B	DATA: 57 29 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2A FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2B FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2C FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2D FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2E FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2F FF FF FF FF FF FF
ID: 0x68B	DATA: 57 20 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 21 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 22 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 23 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 24 FF FF FF FF 00 00
ID: 0x5D7	DATA: 01 03 01 FF FF FF FF FF
ID: 0x301	DATA: 08 00 00 00 42 F7 40 C4
ID: 0x657	DATA: 8B 02 27 01 FF FF FF FF
ID: 0x68B	DATA: 57 10 12 67 01 8A 67 90
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF
ID: 0x68B	DATA: 57 21 4F AE E1 62 8D 56
ID: 0x68B	DATA: 57 22 26 0D E0 42 F7 40
ID: 0x68B	DATA: 57 23 C4 00 00 00 00 00
ID: 0x657	DATA: 8B 10 12 27 02 97 99 57
ID: 0x68B	DATA: 57 30 00 00 00 00 00 00
ID: 0x657	DATA: 8B 21 12 5A 12 10 A1 27
ID: 0x657	DATA: 8B 22 71 1A 53 71 40 E9
ID: 0x657	DATA: 8B 23 54 FF FF FF FF FF
ID: 0x68B	DATA: 57 02 67 02 00 00 00 00
ID: 0x303	DATA: 04 C2 04 3C 00 00 7F 08
ID: 0x5D7	DATA: 01 03 02 FF FF FF FF FF
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x302	DATA: 08 18 1E 51 00 28 01 24
ID: 0x303	DATA: 14 02 00 FD 00 00 7F 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 01 FF FF FF FF FF
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 01 FF FF FF FF FF
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 01 FF FF FF FF FF
ID: 0x303	DATA: 00 02 00 FD 00 00 7F 08
ID: 0x301	DATA: 00 00 00 00 42 F7 40 C4 //相机回复自己的ID
ID: 0x301	DATA: 00 00 00 00 42 F7 40 C4
ID: 0x301	DATA: 00 00 00 00 42 F7 40 C4
ID: 0x657	DATA: 8B 02 27 01 FF FF FF FF //电脑向相机要随机数
ID: 0x68B	DATA: 57 10 12 67 01 00 00 00 //相机向电脑返回随机数和ID
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF
ID: 0x68B	DATA: 57 21 00 00 00 00 00 00
ID: 0x68B	DATA: 57 22 00 00 00 00 00 00
ID: 0x68B	DATA: 57 23 00 00 00 00 00 00
ID: 0x657	DATA: 8B 03 22 01 00 FF FF FF //电脑一看全是0，就有点懵B，问相机你什么意思
ID: 0x68B	DATA: 57 10 23 62 01 00 36 31 //相机说你谁呀就TM指挥我干这干那的
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF //电脑说我是你大爷，好使不
ID: 0x68B	DATA: 57 21 31 33 35 33 36 30 //相机说去你大爷的，我爹都不好使
ID: 0x68B	DATA: 57 22 30 43 31 31 32 33
ID: 0x68B	DATA: 57 23 35 30 30 32 32 38
ID: 0x68B	DATA: 57 24 20 20 20 20 20 20
ID: 0x68B	DATA: 57 25 20 20 20 20 20 20
ID: 0x657	DATA: 8B 03 22 01 02 FF FF FF
ID: 0x68B	DATA: 57 10 7B 62 01 02 39 32
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF
ID: 0x68B	DATA: 57 21 30 35 38 39 39 FF
ID: 0x68B	DATA: 57 22 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 23 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 24 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 25 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 26 32 30 31 32 30 31
ID: 0x68B	DATA: 57 27 32 36 FF FF FF FF
ID: 0x68B	DATA: 57 28 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 29 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2A FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2B FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2C FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2D FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2E FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2F FF FF FF FF FF FF
ID: 0x68B	DATA: 57 20 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 21 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 22 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 23 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 24 FF FF FF FF 00 00
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x657	DATA: 8B 04 2E 01 01 3F FF FF
ID: 0x68B	DATA: 57 03 6E 01 01 00 00 00
ID: 0x657	DATA: 8B 03 22 04 00 FF FF FF
ID: 0x68B	DATA: 57 10 7B 62 04 00 FF FF
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF
ID: 0x68B	DATA: 57 21 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 22 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 23 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 24 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 25 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 26 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 27 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 28 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 29 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2A FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2B FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2C FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2D FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2E FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2F FF FF FF FF FF FF
ID: 0x68B	DATA: 57 20 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 21 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 22 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 23 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 24 FF FF FF FF 00 00
ID: 0x303	DATA: 04 02 00 FD 00 00 7F 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x303	DATA: 04 02 00 FD 00 00 7F 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x303	DATA: 04 02 00 FD 00 00 7F 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x303	DATA: 04 22 00 FD 00 00 7F 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x657	DATA: 8B 02 11 01 00 00 00 00
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 03 FF FF FF FF FF
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 03 FF FF FF FF FF
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 03 FF FF FF FF FF
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 03 FF FF FF FF FF
ID: 0x303	DATA: 00 C2 04 3C 00 90 FF 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 03 FF FF FF FF FF
ID: 0x303	DATA: 04 C2 04 3C 00 00 7F 08
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00
ID: 0x5D7	DATA: 01 03 03 FF FF FF FF FF
ID: 0x303	DATA: 04 C2 04 3C 00 00 7F 08
ID: 0x657	DATA: 8B 03 22 02 00 FF FF FF
ID: 0x68B	DATA: 57 10 7B 62 02 00 00 00
ID: 0x657	DATA: 8B 30 00 02 FF FF FF FF
ID: 0x68B	DATA: 57 21 00 00 00 00 01 9C
ID: 0x68B	DATA: 57 22 00 15 BA F3 00 03
ID: 0x68B	DATA: 57 23 70 8A 00 00 00 00
ID: 0x68B	DATA: 57 24 00 00 00 00 00 00
ID: 0x68B	DATA: 57 25 00 00 00 00 00 00
ID: 0x68B	DATA: 57 26 00 02 D0 B4 00 03
ID: 0x68B	DATA: 57 27 CE 7F 00 00 0C 1B
ID: 0x68B	DATA: 57 28 00 00 00 43 FF FF
ID: 0x68B	DATA: 57 29 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2A FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2B FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2C FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2D FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2E FF FF FF FF FF FF
ID: 0x68B	DATA: 57 2F FF FF FF FF FF FF
ID: 0x68B	DATA: 57 20 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 21 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 22 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 23 FF FF FF FF FF FF
ID: 0x68B	DATA: 57 24 FF FF FF FF 00 00
ID: 0x401	DATA: 00 00 21 0C 01 00 00 00

In the past, the night vision computer would ask the camera for a random number, but later it discovered that the camera gave incorrect numbers multiple times and so entered self-protection mode.

· END ·

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