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[FAQ] DS125DF111: How to determine the data rate that device is lock to?

Nasser Mohammadi
Guru* 88815 points
Part Number: DS125DF111

DS125DF111 is locked and you want to know what is the data rate that device is locked at. What are the settings to determine DS125DF111 locked rate?

  • 0
    TI__Guru* 88815 points
    Please use the following register settings to determine VCO divisor ratio (DS125DF111 and other devices locked rate):

    RAW FF 04 FF //enable read/write into channel 0 - for example
    RAW 0C 00 F0 //setup reg 0x0C to read back lock indication of channel 0
    RAW 02 18 00 //wait until bits 4&3 are set to make sure device is locked
    RAW 0C 30 F0 //setup reg 0x0C to show VCO divisor settings on reg 0x02[5:3]
    RAW 02 38 00 //bits 5 through 3 show VCO divisor settings
    //reg 0x02[5:3] = 000'b 10.3125Gbps
    //reg 0x02[5:3] = 011'b 1.25Gbps
    RAW 0C 00 F0 //restore reg 0x02 to show lock indication

    Regards,,nasser