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TPS65994AD: Confirm the PPM_RESET behavior on TPS66994.

Bruce Dai
Intellectual 620 points
Part Number: TPS65994AD

Tool/software:

Hi AE,

         Step1. PDFW is set to Source Only.

         Step2. When shutdown system, EC will write 0x28 register to 0x03 disables port A and portt B to stop charging the device. ( Port A and Port B can not charge )

         Step3. When the system power on, We found OS will send PPM_RESET and Port A could charge to device.

         I have two questions to ask:

         1. If I send PPM_RESET only to Port A, will it affect both Port A and Port B's registers, or only the Port A register?

         2. After the PPM_RESET command by EC, which registers will be reset? Reset as default FW? 

Best Regards