Other Parts Discussed in Thread: LMX2820, LMX2594, LMK04828
Dear sir or madam,
I am trying to make the synchronous multiple clocks for multi-beam antenna.
I tested some modes of LMK04832 to use the EV board, but i couldn't find out the good setup for LMK04832.
For your understanding, please refer to our topology of clock system.
There are two types of board in our unit.
One is a main board which makes a SYSREF Clock and distributes the 10 MHz Reference clock and SYSREF to FM Boards.
The other are 6 FM Boards which are included DAC & ADC with RFSOC, and there are LMK04832 and LMX2694 in every FM boards.
In my test, there are several questions of setup for LMK04832.
Please refer to the following question and please give your advice.
1. In Main Board, About Clock Distribution mode
- input : SYSREF - From Signal Generator RF out to CLKin0, 10 MHz - From Signal Generator 10MHz out to CLKin1
- PLL Raw register data
R0 (INIT) 0x000090 R0 0x000010 R2 0x000200 R3 0x000306 R4 0x000463 R5 0x0005D1 R6 0x000670 R12 0x000C51 R13 0x000D04 R256 0x010001 R257 0x01010A R258 0x010200 R259 0x010340 R260 0x010420 R261 0x010500 R262 0x010601 R263 0x010711 R264 0x010801 R265 0x01090A R266 0x010A80 R267 0x010B50 R268 0x010C30 R269 0x010D00 R270 0x010E01 R271 0x010F11 R272 0x011001 R273 0x01110A R274 0x011200 R275 0x011340 R276 0x011420 R277 0x011500 R278 0x011601 R279 0x011711 R280 0x011801 R281 0x01190A R282 0x011A00 R283 0x011B40 R284 0x011C20 R285 0x011D00 R286 0x011E01 R287 0x011F11 R288 0x012001 R289 0x01210A R290 0x012200 R291 0x012340 R292 0x012420 R293 0x012500 R294 0x012601 R295 0x012711 R296 0x012801 R297 0x01290A R298 0x012A00 R299 0x012B40 R300 0x012C20 R301 0x012D00 R302 0x012E01 R303 0x012F11 R304 0x013001 R305 0x01310A R306 0x013200 R307 0x013340 R308 0x013420 R309 0x013500 R310 0x013601 R311 0x013711 R312 0x013851 R313 0x013900 R314 0x013A00 R315 0x013B02 R316 0x013C00 R317 0x013D08 R318 0x013E03 R319 0x013F07 R320 0x0140FF R321 0x014100 R322 0x014200 R323 0x014310 R324 0x01447F R325 0x014520 R326 0x014618 R327 0x014700 R328 0x014802 R329 0x014902 R330 0x014A03 R331 0x014B06 R332 0x014C00 R333 0x014D00 R334 0x014EC0 R335 0x014F7F R336 0x015001 R337 0x015102 R338 0x015200 R339 0x015300 R340 0x015478 R341 0x015500 R342 0x015601 R343 0x015700 R344 0x015896 R345 0x015900 R346 0x015A78 R347 0x015BD4 R348 0x015C20 R349 0x015D00 R350 0x015E1E R351 0x015F0B R352 0x016000 R353 0x016101 R354 0x01624C R355 0x016300 R356 0x016400 R357 0x01650C R361 0x016958 R362 0x016A20 R363 0x016B00 R364 0x016C00 R365 0x016D00 R366 0x016E13 R371 0x017370 R375 0x017700 R386 0x018200 R387 0x018300 R358 0x016604 R359 0x016700 R360 0x01680C R1365 0x055500
(Q1) There are no output signals in every CLKOUT even ports - Device Clock 10 MHz.
Would you find out why is not operated in this mode?
(Q2) In spite of getting the outputs in CLKOUT odd ports, but it look like having a jitter in SYSREF such as the picture.
How do i reduce this jitter in clock output?
3. In FM board, About Repeater Mode
- input : SYSREF to SYSREFREQ, 250 MHz to OSCIN
- PLL Raw register data
R114 0x720000 R113 0x710000 R112 0x700000 R111 0x6F0000 R110 0x6E0000 R109 0x6D0000 R108 0x6C00F1 R107 0x6B0000 R106 0x6A0007 R105 0x694440 R104 0x680000 R103 0x670000 R102 0x660000 R101 0x650000 R100 0x640000 R99 0x630000 R98 0x620000 R97 0x610000 R96 0x600000 R95 0x5F0000 R94 0x5E0000 R93 0x5D0000 R92 0x5C0000 R91 0x5B0000 R90 0x5A0000 R89 0x590000 R88 0x580000 R87 0x570000 R86 0x560000 R85 0x550000 R84 0x540000 R83 0x530000 R82 0x520000 R81 0x510000 R80 0x500000 R79 0x4F0000 R78 0x4E0064 R77 0x4D0000 R76 0x4C000C R75 0x4B0800 R74 0x4A0000 R73 0x49003F R72 0x48003C R71 0x47004C R70 0x46C350 R69 0x450000 R68 0x4403E8 R67 0x430000 R66 0x4201F4 R65 0x410000 R64 0x401388 R63 0x3F0000 R62 0x3E0322 R61 0x3D00A8 R60 0x3C09C4 R59 0x3B0001 R58 0x3A0001 R57 0x390020 R56 0x380000 R55 0x370000 R54 0x360000 R53 0x350000 R52 0x340420 R51 0x330080 R50 0x320000 R49 0x314180 R48 0x300300 R47 0x2F0300 R46 0x2E07FE R45 0x2DC0DF R44 0x2C1F23 R43 0x2B0000 R42 0x2A0000 R41 0x290000 R40 0x280000 R39 0x27DA80 R38 0x26FD51 R37 0x258104 R36 0x240028 R35 0x230004 R34 0x220000 R33 0x211E21 R32 0x200393 R31 0x1F43EC R30 0x1E318C R29 0x1D318C R28 0x1C0488 R27 0x1B0002 R26 0x1A0DB0 R25 0x190624 R24 0x18071A R23 0x17007C R22 0x160001 R21 0x150401 R20 0x14F048 R19 0x1327B7 R18 0x120064 R17 0x11012C R16 0x100080 R15 0x0F064F R14 0x0E1E70 R13 0x0D4000 R12 0x0C5004 R11 0x0B0018 R10 0x0A10D8 R9 0x090604 R8 0x082000 R7 0x0700B2 R6 0x067802 R5 0x0503E8 R4 0x040E43 R3 0x030642 R2 0x020500 R1 0x01080B R0 0x00609C
(Q3) Are there nothing setup of SYSREF, if SYSREF_EN and SYSREF_REPEAT are on?
Is it just repeated according to the following to SYSREFREQ input signal, am i understanding right?
4. About Synchronous all of Clock
(Q4) To achieve the Synchronous between all of FM boards, is there any other recommendation for me? please give your advice.
Thank you,
Best Regards,
