DS90ub913 EV Kit set up with sony sensor IMX122LQJ-C

Hi Bogey,

 A couple of things to configure when connecting to the Sony sensor:

1) The sensor appears to use 1.8V I/O, so be use that you've configured the 913 for1.8V VDDIO  (JP8 of 913 board).

2) Make sure that the mapping of output pins from the sensor development board is matched correctly to the 913 input pin header assignment.

3) As an initial conservative approach, I would recommend using the external osc mode to clock the device. This will ignore effects of clock jitter from the Sony sensor clock output. Refer to EVM user manual settings for switch 8 - this is the default mode set on the pre-configured EVM.

4) by default, the EVM is set for 10-bit parallel bus input. Note that this may be changed to 12-bit if needed. Please reference options for setting switch SW6 on the 914 to configure the desired operating mode.

Best regards,

Sue

Dear Sir

Good day,

when we  want run 913 in10bit 100MHz mode.

May we will need MCU to set "DS90UB913Q Reg 0x14 [2:1] will also change to "01"?

If no change,  if this will impact perfromance?

Or may TI have initial code for customer to reference to check register?

                                                  Best regards,

                                                                   Bogey

Hello Bogey,

 Reg 0x14[2:1] sets the frequency of the serializer's internal oscillator. This is used to drive the serializer output in the event that the input source PCLK is not present.

  If this register is set to the value "01" when operating in 10-bit mode,the internal osc will drive the serial output based on 100MHz oscillator.

  When the source input PCLK is present, the setting of register 0x14[2:1] will be ignored. The value of reg 0x14 will have no impact on performance in normal operating mode (when input source PCLK is present).

Best regards.

Sue

Dear Sue

Good days,

thanks for your reply.

May we direct check what registers we must to write in 10 bit 100M PCLK mode(Just use one 913 and one 914)?

or We can don't need set registers value in inital condition in this kind of application.

                                                     Best regards,

                                                                            Bogey

Hello Bogey,

  The mode pin on the deserializer will intialize the chipset (ser and des) to the selected operating mode. If 10-bit 100MHz is selected (Rmode = 11kOhm), then no additional configuration is required .

Best regards,

Sue

Dear Sue

Good days,

Many thanks for your help.

it is mean if we use 12 bit pclk 75M condition, we just only set 914 Rmode = 3K. and 913

set Rmode =100K. the ser and des will normal work. also no additional configurated??

Another question is my customer use in 10bit PCLK 100M condition.  but lock pin can't be lock. until we down PCLK to 36M, then lock pin can be lock. my customer use USB2.0 cable and cable length around 25cm.

May you pls have some suggestion for us taht what we need to notice?

                                                                  Best regards,

                                                                               Bogey

Dear Sue

Good  days,

May we check if you have ds90ub913/914 layout guide or 913/914 EVB PCB gerber ?

                                   Best regards,

                                                         Bogey

Bogey

Please send me your e-mail address at mark.sauerwald@ti.com and I will send you information on the 913/914 layout

Dear Sir

I have send the mail to you and pls share some suggestion for us.

                                     best regards,

                                                          Bogey

Bogey

One more thing to check - I believe that the Sony imager has the data transitions at the rising edge of PCLK, which means that you may be violating the '913 setup and hold times.   You can correct this by writing to the '913 register 0x03, bit 0 to make it latch the data in on the falling edge of PCLK rather than the rising edge.