Other Parts Discussed in Thread: LP873220, AM5706, , LP8733-Q1, LP8732-Q1, TPS51200, TPS22965
Hello,
Is there a way to synchronize the LP87332D and LP873220 PMIC chips to a 2.048MHz master clock? This is for an AM5706 design.
Thanks!
Ryan B
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Hi David,
Thank you for elaborating, I see now what mean.
If CLKIN pins are changed to CLKIN by I2C, then they will no longer function as GPO2. Looking at the sequence in SNVU577, it may be possible to enable the TPS51200 with a Schmitt Trigger like SN74LVC1G17DCKR from LP873220_BUCK1 and PORZ could be generated with just LP873220_GPO since it seems to have the same timing with both EN pins shorted together. Note that I2C communication would be necessary to set the CLKIN_PIN_SEL bit in the CONFIG register after the OTP loads.
Our LP873x system expert will be back in the office on Tuesday and may be able to provide more insight or identify any risks with the above modifications. Would the benefits of using the pins as CLKIN be worth the extra effort to device a slightly different solution?