Other Parts Discussed in Thread: DS125DF410, DS110DF410
Hi:
There is a 10.3125Gbps rate signal access the input ,I want to the DS125DF111 output the clock recovery,how to set it?
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Hi:
There is a 10.3125Gbps rate signal access the input ,I want to the DS125DF111 output the clock recovery,how to set it?
Dear Nasser;
I have confirmed to set 0x1E[7:5] t0 011 or 010,The output pin is still data.
If it doesn't support this. Do TI have any other IC support clock recovery and Data rate support 1.25Gbps~11.3Gbps?
Regards.
Greetings,
1). Please note in additiona to setting reg 0x1E[7:5], you also need to set reg 0x9[5]. Was this done?
2). You can also consider DS125DF410. Please note table 6 of this device data sheet. Here is a link to this part's data sheet:
Regards,, Nasser
Dear Nasser;
1). I reconfirmed DS125DF111,output the internal 10 MHz clock is ok,but can't output Q and I Clock;
10MHz clock output seting:
WIIC 0x30 0xff 0x05
WIIC 0X30 0X09 0X20
WIIC 0X30 0X1E 0XA0
result is a clock 9Mhz
Q-clock output seting:
WIIC 0x30 0xff 0x05
WIIC 0X30 0X09 0X20
WIIC 0X30 0X1E 0X60
result is a voltage 1.5V
I-clock output seting:
WIIC 0x30 0xff 0x05
WIIC 0X30 0X09 0X20
WIIC 0X30 0X1E 0X40
result is a voltage 1.5V
other question,what is Q and I clock?The clock come from input Data?
2) I don't have DS125DF410,now.
Regards.
Greetings,
1). I checked and DS125DF111 cannot output recovered clock. I/Q clock are the line recovered clock.
2). As noted in the DS125DF410 data sheet, this part can provide line recovered VCO clock. Please note these are not tested in production.
However, given you are not using DS125DF410, your present design based on DS125DF111 cannot support this feature.
Regards,, Nasser
Greetings,
I've tested DS110DF410,There is a signal input, but can't output the Q-clock,what's the setting wrong?Can you hele me?
This is setting file
Regards,,
Hi Andysss,
Reviewed your register settings and it seems device is locked and thus we should be able to output I/Q clock as noted in table 6 of the data sheet. Let's do this: First please make sure channel 0 is locked and then set reg 0x09[5]=1'b1. Further, try settings reg 0x1E[7:5]=3'b010. You can also try setting reg 0x09[7:0]=0x49.
Regards,, Nasser
Greetings,
We have checked this in the lab below and register settings below would generate the recovered clock:
The channel register write routine below should work
REG Value Mask Comment
09 20 20 //Over-ride PFD Mux
1e 40 e0 //Bring out eye clock from PFD to driver
Please make sure you have these settings and the device is locked(i think this is the case based on your earlier report).
Regards,, Nasser
Greetings,
We have tested it again, input data rate is 1.25Gbps and pattern is PRBS 7/23/31;
There is a video, in the video 8 seconds before we set output 10M clock is ok and last two seconds we set output I‘clock is fail
There is any picture/video/log about the test, We can't find out what's wrong
This picture is test DS110DF410 output The eye diagram
Best regards..
Greetings,
We ran a test in lab -channel 0 - and please below note 10GHz eye diagram and register settings. We used the same register settings that we had recommended earlier.
Regards,, NasserRX Recovered Clock CH0.cfg
Greetings,
You tested input data is 10Gbps or 1.25Gbps?
If the input data is 1.25Gbps, is the output clock 1.25Ghz or 10Ghz? We need to output 1.25Ghz clock, is the IC supported? If not, is there any other IC to divide the clock by 8?
Regards!
Hi Nasser,
The IC is very perfect,but we still haven't found out the problem about us.
We need more informatin,As follows
1. We think the extract clock functions DS125DF410 is same to DS110DF410,so,we tested IC is DS110DF410,and you?
2.Does it mean that the input signal is 10.3125Gbps ,either at 1.289Ghz or 10.3125G clock can be output? What are the register settings different for the two Freq clock?
3.Can you share more detailed information about conditions, steps,methods,pictures,video and more?
The more the better,We will try our best to find out our problems.
Thank you very much!
Greetings,
1). Yes i checked DS110DF410 as well.
2). Yes i used either 10.3125Gbps or 1.25Gbps PRBS15 signals and confirmed device is locked and then was able to output recovered clock.
3). In the earlier post, i also included .cfg file. This file has the exact register settings which were used.
Regards,, nasser
Hi Nasser,
Thank you very much!We have solved the problem.
There are some other questions about the retimer.
1) The retimer start with standard mode "Ethernet", is there a way for it to automatically switch modes based on the input data.for example,when the input data is 1.25Gbps auto switch to "Ethernet" and input data is 9.953Gbps auto switch to SDH/SONET.If not,How to setting the Retimer start with SDH/SONET after power off.
2) There are 4 Pins indicating the locked state, Is there a function to assert signal detect?
3) We want to the i-clock divider by 2(4 or 8 is ok).for example 10.3125Gbps data recovery 10.3125Ghz clock,we want the i-clock is 5.51625Ghz (2.278125Ghz or 1.289Ghz is ok) and the clock must synchronize with input data.
4)earlier,you shared the Recovery 10Ghz clock,We noted the clock amplitude is only 130mVp-p, How to increase the amplitude through registers(compensation for high loss)?
Best Regards..
Hi, see my inputs below to the four listed items.
0x54 |
00 |
7 |
0 |
N |
R |
Signal Detect observation bit. |
6 |
0 |
EQ Limiting (CTLE Stage 3[2]) observation bit. |
||||
5:2 |
0000 |
Reserved |
||||
1 |
0 |
CDR Lock Interrupt |
||||
0 |
0 |
Signal Detect Interrupt |
Cordially,
Rodrigo Natal
HSSC Applications Engineer
Hi,
The DS110DF410 retimer does not have the signal detect observation bit that the DS125DF111 does, but it does have a signal detect interrupt. My other inputs apply to both DS110DF410 and DS125DF111, as these products share similar design/architecture/digital features.
Cordially,
Rodrigo Natal
HSSC Applications Engineer