Use ds90ub927&ds90ub928 for serial deserialization.
1. Is there a configuration example provided for this application?
2. ds90ub927IIC configuration transparent mode, unable to access ds90ub928 , 0x06 configuration failed. The configuration of 927 is as follows
|
reg |
val |
|
0x01 |
0x03 |
|
0x03 |
0xDA |
|
0x06 |
0x58 |
|
0x07 |
0x20 |
|
0x08 |
0x20 |
|
0x17 |
0x8E |
Hi Kevin,
1. Is there a configuration example provided for this application?
You don't need to configure anything for these devices to work, they should work right when you connect them together.
Those devices are plug and play, you don't need to change any settings, once you connect the FPD-Link channel for Dout+/- to RIN+/- and power-up they should work right out the box.
Make sure your IDx is set to the correct address on both Ser/Des side and your Mode_Sel on the Des side is set to the correct straps.
2. ds90ub927IIC configuration transparent mode, unable to access ds90ub928 , 0x06 configuration failed. The configuration of 927 is as follows
Do you have access to Analog LaunchPad (ALP) on your PC? If yes, can you connect your PC to the local I2C of the 927 or 928 and send me a screen shot of your information tab? It should look as follows right after power-up.
As seen in this image, this is my setup, I have the 927 EVM connected to 928 EVM and I'm using ALP to access the 928 profile on ALP and have connected my PC to the 928 EVM through the mini-USB cable to access local I2C of 928 EVM.
The information tab shows DES is DS90UB928 and I2C = 0x58 , PCLK =34 MHZ and SER is DS90UB927 , I2C = 0x18 and PCLK = 33 MHZ
Also, I have CDR Locked and Link to Ser established.
Your 927 Registers
| reg | val | Comments |
| 0x00 | ? | What is the I2C address of 927? |
| 0x01 | 0x03 | This should be 0x00 by default 0x03 means your Ser is stuck in Reset state This will prevent the Ser from sending video or I2C or any data to Des side ( This will cause an issue) you need to figure out why your Ser is stuck on reset ? |
| 0x03 | 0xDA | Default value is 0xD2 You have 0xDA which means bit3 is enabled (I2C Pass-through) |
| 0x06 | 0x58 | This is correct if your 928 IDX pin (I2C Address) is set to 0x58 |
| 0x07 | 0x20 | NA |
| 0x08 | 0x20 | NA |
| 0x17 | 0x8E | Default value is 0x1E , you have 0x8E which means bits 7:4 are flipped |
Regards,
Fadi A.
