when I use 835 integer mode, as the datasheet ,Reg09h[22:21] shuold be set '00'b.However ,when I set '00',the chip can not be locked ,when I set '10',the chip can be locked .I can not understand .why. Other registers are set as
Make sure that both up and down PFD's are enabled Reg0Bh[6:5]=11b
I bumped into this same problem: HMC835 does not lock when bits [22:21] in Reg 09h are set to "00"b, even when [6:5] in Reg 0Bh are "11"b. I'm using external reference clock.
Retrieving data ...