LMK04828BEVM: PLL2 Lock

YuukiWatanabe

Prodigy 180 points

Part Number: LMK04828BEVM

Tool/software:

Clkin1: 122.88MHz/0dbm

EXTERNAL VCO: 122.88MHz

PLL2 does not LOCK.

The .txt file is also attached to the attached file. Please help me.

Fullscreen AFE_2457.6MHz_HSDS10mA_5.1M(2cycles).txt Download

R0 (INIT)	0x000090
R0	0x000000
R2	0x000200
R3	0x000306
R4	0x0004D0
R5	0x00055B
R6	0x000600
R12	0x000C51
R13	0x000D04
R256	0x01000A
R257	0x010155
R258	0x010210
R259	0x010310
R260	0x010422
R261	0x010500
R262	0x010691
R263	0x010701
R264	0x010801
R265	0x010955
R266	0x010A10
R267	0x010B00
R268	0x010C22
R269	0x010D00
R270	0x010E90
R271	0x010F14
R272	0x011014
R273	0x011155
R274	0x011290
R275	0x011300
R276	0x011422
R277	0x011500
R278	0x011691
R279	0x011701
R280	0x011818
R281	0x011955
R282	0x011A10
R283	0x011B00
R284	0x011C22
R285	0x011D00
R286	0x011E99
R287	0x011F11
R288	0x01200C
R289	0x012155
R290	0x012210
R291	0x012318
R292	0x012422
R293	0x012500
R294	0x012690
R295	0x012710
R296	0x012808
R297	0x012955
R298	0x012A90
R299	0x012B10
R300	0x012C22
R301	0x012D00
R302	0x012E99
R303	0x012F00
R304	0x013014
R305	0x013155
R306	0x013210
R307	0x013300
R308	0x013422
R309	0x013500
R310	0x013691
R311	0x013701
R312	0x013800
R313	0x013903
R314	0x013A01
R315	0x013BE2
R316	0x013C00
R317	0x013D08
R318	0x013E03
R319	0x013F06
R320	0x014003
R321	0x014100
R322	0x014200
R323	0x014313
R324	0x0144FF
R325	0x01457F
R326	0x014610
R327	0x01471B
R328	0x014802
R329	0x014942
R330	0x014A02
R331	0x014B16
R332	0x014C00
R333	0x014D00
R334	0x014EC0
R335	0x014F7F
R336	0x015043
R337	0x015102
R338	0x015200
R339	0x015300
R340	0x01547D
R341	0x015500
R342	0x015604
R343	0x015700
R344	0x015896
R345	0x015900
R346	0x015A04
R347	0x015BDF
R348	0x015C20
R349	0x015D00
R350	0x015E00
R351	0x015F0B
R352	0x016000
R353	0x016101
R354	0x01622C
R355	0x016300
R356	0x016400
R357	0x01650C
R369	0x0171AA
R370	0x017202
R380	0x017C15
R381	0x017D33
R358	0x016600
R359	0x016700
R360	0x01680A
R361	0x016959
R362	0x016A20
R363	0x016B00
R364	0x016C00
R365	0x016D00
R366	0x016E13
R371	0x017310
R386	0x018200
R387	0x018300
R388	0x018400
R389	0x018500
R392	0x018800
R393	0x018900
R394	0x018A00
R395	0x018B00
R8189	0x1FFD00
R8190	0x1FFE00
R8191	0x1FFF53

10 months ago

0 vicente flores prado 10 months ago

TI__Mastermind 29002 points

Hello Yuuki,
I tried importing your .txt file but everything appears to be 0 on TICSpro.
Please attach a .tcs file instead.

Does PLL1 lock? Was the loop filter properly designed on PLLatinumSim?

Can you attach a copy of your schematic?

Best regards,

Vicente

0 YuukiWatanabe 10 months ago in reply to vicente flores prado

Prodigy 180 points

PLL1 is Lock.
There is no circuit diagram because it is an evaluation board.
I don't play with the filter.

The .tcs file is also attached to the attached file. Please help me.

2.5G.tcs

0 vicente flores prado 10 months ago in reply to YuukiWatanabe

TI__Mastermind 29002 points

Hello Yuuki,
If you're using the EVM and the board has not been reworked - can you load the default configuration in TICSpro & achieve lock?

Best regards,

Vicente

0 vicente flores prado 10 months ago in reply to vicente flores prado

TI__Mastermind 29002 points

Hello Yuuki,
I had the same issue with you config.
I didn't see anything out of the ordinary with it though which was a bit odd.

I used the default config and changed the divider values for PLL1 & PLL2 to match yours and was able to achieve lock.
Try this revised config.

Best regards,

Vicente

2.5G_revised.tcs

Clock & timing

Clock & timing forum

LMK04828BEVM: PLL2 Lock