Dear team
The issue describe as below
The car camera products use Ser 953- Des 954 to light up the camera. The problem is currently encountered.
The 23MHz crystal oscillator (REFCLK = 23MHz) on the Des 954 board cannot light up the camera.
But a 25MHz crystal oscillator (REFCLK = 25 MHz) on the 954 board can successfully light up the camera. Is this problem related to the frame rate 30Hz/60Hz of the Image sensor?
The hardware setting as below :
Sensor ISX021: MIPI 4 lanes output, frame rate 60fps, data rate 756Mbps / lane,
Deserializer 954: REFCLK input 23MHz oscillator, Mode: mode 4 (CSI-2 Synchronous Back Channel)
Serializer 953: No clock input (CLKIN open), Clocking Mode: mode 0 (CSI-2 synchronous mode).
ULM 928: MIPI max data rate 1Gbps / lane.
The registers of Programming are listed in the attachment, Only the registers of programming 954 are used, and there is default setting of 953's Reg. I2C communication is OK, can access image sensor through I2C, But the image cannot be displayed.
// TI 954 setting
// (register, value)
0x0C,0xC1
0x33,0x01
0x20,0x20
0x4c,0x01
0x6d,0x7c
0x58,0x5e
0x5B,0x30
0x5C,0x30
0x5d,0x34
0x65,0x34
0x06,0x00
0x05,0x00
// TI 953 setting
// (register, value)
If change the 954 REFCLK input to 25MHz oscillator, the registers listed in the programming attachment, The image can be displayed successfully, so the bridge board hardware should be no problem.
Many thanks
Denny
