• State Resolved
  • Locked Locked
  • Replies 11 replies
  • Subscribers 46 subscribers
  • Views 4265 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TSW4806EVM: HOW TO USE IT FOR A 500M CLK

user4780129
Intellectual 410 points
Part Number: TSW4806EVM


HI

I want to use tse4806 for a clk which is 500M,but i cant calculate it.

can you give me some advice？

wang

  • 0
    TI__Guru* 91947 points

    Wang,

    Go ahead and load the attached .txt file then click on send all.

    Regards,

    Jim

    Fullscreen LMK_500MHz_output.txt Download 
    LMK04800 Registers:

0x00 0x0000005
0x01 0x0000004
0x02 0x000a805
0x03 0x400080a
0x04 0x400080a
0x05 0x0000005
0x06 0x4404000
0x07 0x043b000
0x08 0x0400000
0x09 0x2aaaaaa
0x0a 0x48a0210
0x0b 0x1bf8880
0x0c 0x098600d
0x0d 0x1d81033
0x0e 0x0900000
0x0f 0x4000400
0x10 0x00aa820
0x18 0x0000006
0x19 0x0080800
0x1a 0x47d18e0
0x1b 0x08000c1
0x1c 0x0008180
0x1d 0x0000032
0x1e 0x0280032
0x1f 0x0000000
    LMK_500MHz_ouput.pptx

  • 0 in reply to jim s
    Intellectual 410 points
    JIM

    I also need a frequence which is 520M
    can you give another file

    THANK YOU VERY MUCH
    wang
  • 0 in reply to user4780129
    TI__Guru* 91947 points

    Wang,

    In the LMK04800 main tab, just change the N divider from 50 to 52. Then click on the send all tab at the top of the GUI.

    Regards,

    Jim

  • 0 in reply to jim s
    Intellectual 410 points
    Jim

    THANK you very much.You gave me a lot of help.

    wang
  • 0 in reply to jim s
    Intellectual 410 points
    I dont know why it cant work with a change for 50 to 52.
    can you give me a txt file for 520M and 400M

    THANK YOU
  • 0 in reply to user4780129
    TI__Guru* 91947 points

    User,

    Change the N divider to 48, not 52 and use a clock output divider of 6.

    Regards,

    Jim

  • 0 in reply to jim s
    Intellectual 410 points
    Jim

    how to get a clk for 400M
    i set prescalar = 6 N divider = 40 R divider = 1
    and use a clock output divider of 6
    but i cant get a 400M clk
    Where i am wrong?

    wang
  • 0 in reply to user4780129
    TI__Guru* 91947 points

    User,

    Per my last instructions, I mentioned to set the N divider to 48. Why are you using 40? Leave the prescaler at 5 and change the "CLKout 0 and 1" divider to 6.

    Regards,

    Jim 

  • 0 in reply to jim s
    Intellectual 410 points
    Jim

    I set the N divider to 48 the prescaler at 5 and change the "CLKout 0 and 1" divider to 6.
    Then i get a clk for 413.4M. I cant get a 400M clk.

    Regards
    Wang
  • 0 in reply to user4780129
    TI__Guru* 91947 points

    Wang,

    Verify you have 10MHz at SMA J16 and that the LMK device is labeled as a LMK4806 device.

    Regards,

    Jim

  • 0 in reply to jim s
    Intellectual 410 points
    Jim

    my board is tsw4806em and i have tested the 10M'output. its ok.
    the clk of 500M is ok with the file you send for me.

    wang