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LMK04821: lmk04821 clkin0 registers setting required

Part Number: LMK04821
Other Parts Discussed in Thread: LMK04828, CDCM6208,

Hello,

We are using the LMK04828 circuit used in AFE76xx in one of our LTE board.

The Clkin0 is driven by 122.88MHz clock from CDCM6208.

An oscillator is connected to the OSCIN input of the clock chip.

The issue is,

When we use the CLKIN0, we are observing carrier offset at the output of the front end RF circuit.

Where as while we use the OSCIN input we are not seeing the carrier offset. The RF output is OK, without any problem. The register values are attached. Kindly let us know the update required. In the actual system, the clock input is to CLKIN0. Kindly reply.

Regards,

Sumathi

HexRegisterValues_CLK0.txt
R0 (INIT)	0x000090
R0	0x200000E
R2	0x000200
R3	0x000306
R4	0x0004D0
R5	0x00055B
R6	0x000600
R12	0x000C51
R13	0x000D04
R256	0x010006
R257	0x010155
R258	0x010255
R259	0x010301
R260	0x010422
R261	0x010500
R262	0x0106F0
R263	0x010711
R264	0x010806
R265	0x010955
R266	0x010A55
R267	0x010B00
R268	0x010C22
R269	0x010D00
R270	0x010EF0
R271	0x010F11
R272	0x011006
R273	0x011155
R274	0x011255
R275	0x011300
R276	0x011422
R277	0x011500
R278	0x0116F0
R279	0x011711
R280	0x011806
R281	0x011955
R282	0x011A55
R283	0x011B00
R284	0x011C22
R285	0x011D00
R286	0x011EF0
R287	0x011F11
R288	0x012006
R289	0x012155
R290	0x012255
R291	0x012300
R292	0x012422
R293	0x012500
R294	0x0126F0
R295	0x012711
R296	0x012806
R297	0x012955
R298	0x012A55
R299	0x012B00
R300	0x012C22
R301	0x012D00
R302	0x012EF0
R303	0x012F11
R304	0x013006
R305	0x013155
R306	0x013255
R307	0x013300
R308	0x013422
R309	0x013500
R310	0x0136F0
R311	0x013711
R312	0x013825
R313	0x013903
R314	0x013A18
R315	0x013B00
R316	0x013C00
R317	0x013D08
R318	0x013E03
R319	0x013F00
R320	0x014009
R321	0x014100
R322	0x014200
R323	0x014351
R324	0x014493
R325	0x01457F
R326	0x014608
R327	0x01470A
R328	0x014802
R329	0x014942
R330	0x014A02
R331	0x014B16
R332	0x014C00
R333	0x014D00
R334	0x014EC0
R335	0x014F7F
R336	0x015003
R337	0x015102
R338	0x015200
R339	0x015300
R340	0x015478
R341	0x015500
R342	0x015678
R343	0x015700
R344	0x015896
R345	0x015900
R346	0x015A78
R347	0x015BD4
R348	0x015C20
R349	0x015D00
R350	0x015E00
R351	0x015F0B
R352	0x016000
R353	0x016101
R354	0x016244
R355	0x016300
R356	0x016400
R357	0x01650C
R369	0x0171AA
R370	0x017202
R371	0x017300
R372	0x017414
R380	0x017C15
R381	0x017D33
R358	0x016600
R359	0x016700
R360	0x016803
R361	0x016959
R362	0x016A20
R363	0x016B00
R364	0x016C00
R365	0x016D00
R366	0x016E13
R8189	0x1FFD00
R8190	0x1FFE00
R8191	0x1FFF53