TDA4VM: ddr, retention, ddr_ret

user6283181

Prodigy 110 points

Part Number: TDA4VM

In TDA4VM, what is DDR retention function strategy?

under which condition, we need open or close DDR retention function?

Does TDA4VM inform LEO-B DDR_RET_1V1 output via I2C?

over 5 years ago

0 M V Pratap Reddy over 5 years ago

TI__Intellectual 1160 points

Hi,

DDR retention functionality is used to keep the DDR memory contents intact while powering down the other domains of the system. This is used while keeping the system in low power modes, typically in battery operated systems.

DDR retention pin on TDA4VM is controlled by external sources like PMIC on the EVM. State of this pin is not controlled by the PMIC firmware but need to be configured from SoC through I2C interface.

- Pratap.

0 user6283181 over 5 years ago in reply to M V Pratap Reddy

Prodigy 110 points

Hi, Pratap,

thanks! I got it.

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TDA4VM: ddr, retention, ddr_ret