cdcm6208v2 Clock won't lock

sherry yang

25m single cmos input to pri-refp, pin mode 0x09

The output clock sometimes lock and sometimes don't lock in status.1.docx

0 sherry yang over 6 years ago

The output clock sometimes lock and sometimes don't lock in status 0

0 Dinesh Jain over 6 years ago

Hello Sherry,

Pin Mode 0x09 accepts 38.4MHz input. However, the schematic (and your comments) says 25M.

Further PRI_REF accepts LVDS input, while SEC_REF accepts XTAL input (Page #40 of the datasheet).

Please provide appropriate input.

Dinesh.

0 sherry yang over 6 years ago in reply to Dinesh Jain

Hi Dinesh,

Thanks for your reply

Why Mode 0x09 accepts 38.4MHz input? The datasheet says 25MHz.

0 Dinesh Jain over 6 years ago in reply to sherry yang

Hello Sherry,

Your subject line says CDCM6208V2. Pin Mode 0x09 of V2 device supports 38.4MHz LVDS input.

Pin Mode 0x09 of V1H device supports 25MHz LVCMOS input - Page #38 of d/s.

0 sherry yang over 6 years ago in reply to Dinesh Jain

Hi Dinesh,

OK. Got it with many thanks!

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