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LMX2592: Lmx2592

Dim Dom
Prodigy 170 points
Part Number: LMX2592
Other Parts Discussed in Thread: LMX2594,

Hallo.  I load by spi registers calculated in Tics, but no lmx working. HW design is ok, powers and ref in. Do I have send optional commands by spi ? BR

  • 0
    TI__Guru* 81400 points

    Hi Dim,

    Could you provide your TICS Pro configuration file (.tcs file)?

  • 0 in reply to Noel Fung
    Prodigy 170 points

    yes. attached

    2592.txt 
    R64	0x400377
R62	0x3E0000
R61	0x3D0001
R59	0x3B0000
R48	0x3003FD
R47	0x2F08FC
R46	0x2E0F63
R45	0x2D0000
R44	0x2C0000
R43	0x2B0000
R42	0x2A0000
R41	0x290001
R40	0x280000
R39	0x278204
R38	0x26003C
R37	0x254000
R36	0x240011
R35	0x23021F
R34	0x22C3EA
R33	0x212A0A
R32	0x20210A
R31	0x1F0201
R30	0x1E0034
R29	0x1D0084
R28	0x1C2924
R25	0x190000
R24	0x180509
R23	0x178842
R22	0x162300
R20	0x14012C
R19	0x130965
R14	0x0E0420
R13	0x0D4000
R12	0x0C7001
R11	0x0B0018
R10	0x0A1158
R9	0x090302
R8	0x081084
R7	0x0728B2
R4	0x041943
R2	0x020500
R1	0x010808
R0	0x00001C
    2592_pll.tcs

  • 0 in reply to Dim Dom
    TI__Guru* 81400 points

    Hi Dim,

    The Multiplier setting is not correct, there are input/output frequency requirement to the Multiplier.

    Suggest set Multiplier = 1 but use Doubler = x2 to maintain 100MHz fpd. In general, we don't need FCAL_FAST and ACAL_FAST. Others look good. Make sure after Vcc power up, program all the registers once in descending order. 

  • 0 in reply to Noel Fung
    Prodigy 170 points

    Hallo. It not helps. I have working board with lmx2594. , I replaced chip ito lnx2592.,load its registers and no LD. by scope on vtune in,it try lock.. BR

  • 0 in reply to Dim Dom
    TI__Guru* 81400 points

    Hi Dim,

    Did you change the loop filter accordingly to suit for LMX2592? Software configuration looks good, so maybe you have a hardware issue.