SLVAF24 April   2021 TPS65988

 

  1.   Trademarks
  2. 1Automatic RDO for Explicit Contracts in SINK Role
    1. 1.1 Autonegotiate Sink Register (0x37)
    2. 1.2 Automatic PDO Selection as a Sink
    3. 1.3 Autonegotiate PDO Selection Flow
    4. 1.4 Autonegotiate Behavior Examples
  3. 2Multi Port Source Policy Management
    1. 2.1 Multi Port Source Policy Management Flow
  4. 3Multiport Sink Policy Management
  5. 4Revision History

1.2 Automatic PDO Selection as a Sink

The Automatic PDO selection depends on the below fields from the AutoNegotiate Sink register:

Bytes 3-4: Auto Negotiate Minimum Sink Required Operating Power
9:0 ANSinkMinRequiredPower
Byte 2: Auto-negotiate control

0

 AutoComputeSinkMinPower
Byte 1: Auto-negotiate control and RDO flags

5:4

OfferPriority

0

 AutoNgt

Bit Field Descriptions and PDO Selection Behavior:

  • AutoNgt: Setting this bit enables the Autonegotiate Sink behavior. This bit is the master control that enables / disables this feature.
  • OfferPriority: These bits allow the user a choice of precedence between Highest Voltage, Highest Current and Highest power. This is irrespective of a capability mismatch being set.
  • AutoComputeSinkMinPower: Setting this bit enables the PD controller to determine the power requirement of the system based on the Sink PDOs. The minimum power required by the Sink is computed as the maximum of power computed per Sink PDO.
  • ANSinkMinRequiredPower: If the bit AutoComputeSinkMinPower is not set, the parameter entered in this field is used as the minimum power requirement of the sink.