LMK03200: Locking issue with the LMK03200

Vikas Kumar40

Part Number: LMK03200

I am using LMK03200. But I am not able to lock the PLL to 1200 MHz which is the LO.

I have attached the programming registers as well schematic. Please give me suggestion.

R0 (INIT)	0x80000100
R0	0x00030400
R1	0x00000101
R2	0x00000102
R3	0x00030403
R4	0x00000104
R5	0x00030405
R6	0x00030406
R7	0x04000107
R8	0x10000908
R9	0xA0032A09
R11	0x0082000B
R13	0x029E000D
R14	0x1800030E
R15	0xE0001E0F

over 8 years ago

0 Puneet Sareen over 8 years ago

TI__Expert 8865 points

Hello Vikas

Thanks for contacting e2e support. Let me check your configuration and i will come back to you as soon as possible.

Best regards
Puneet

0 Puneet Sareen over 8 years ago in reply to Puneet Sareen

TI__Expert 8865 points

Hello Vikas

I reviewed your schematic and the programming registers. You are using an external feedback mode. The 0-delay mode with external feedback is setup in two steps. The setps are detailed in the attached extract pages from the datasheet. Please make sure that you are following the sequence as described. The setup is also described with some examples. I hope that helps.

Best regards

Puneet

0-Delay_Mode_Prog_Seq - lmk03200.pdf

0 Vikas Kumar40 over 8 years ago in reply to Puneet Sareen

Intellectual 660 points

Hi Puneet

If I want to avoid the programming sequence maintaining the internal feedback, Can I do that with the same hardware.

Clock & timing

Clock & timing forum

LMK03200: Locking issue with the LMK03200