Hi !, community.
I found operating voltage restriction between LDO_SOC and LDO_PU in iMX6SDL datasheet IMX6SDLAEC (Rev. 5, 06/2015)
----- Page 26, Note4
In LDO enabled mode, the internal LDO output set points must be configured such that the:
• VDD_ARM LDO output set point does not exceed the VDD_SOC LDO output set point by more than 100 mV.
• VDD_SOC LDO output set point is equal to the VDD_PU LDO output set point.
The VDD_ARM LDO output set point can be lower than the VDD_SOC LDO output set point, however, the minimum output set points shown in this table must be maintained.
But, our customer set each LDO voltage with LDO enable mode as follow:
(They use custom linux OS.)
- LDO_SOC_CAP = 1.200V (PMU_REG_CORE [REG2_TARG] is set to 10100)
- LDO_PU_CAP = 1.150V (PMU_REG_CORE [REG1_TARG] is set to 10010)
That is LDO_SOC_CAP and LDO_PU_CAP are not same voltage setting.
What will be a problem in this case ?