SLLSFK6 September 2021 TUSB217A-Q1
PRODUCTION DATA
Battery charging controller feature is always enabled in TUSB217A-Q1 RWB and supports both CDP charging downstream port functionality and DCP dedicated charging port functionality depending on DCP/CDP pin. When DCP/CDP pin is high the BC 1.2 controller supports CDP mode and when DCP/CDP pin is low BC 1.2 controller supports DCP mode. DCP/CDP pin can be dynamically controlled. When host or hub is disabled DCP/CDP pin can be set low to support DCP mode and when host or hub is enabled DCP/CDP pin can be set to high to support CDP. Downstream VBUS should be toggled after the DCP/CDP pin change so BC 1.2 handshake starts over to indicate charging mode change.
DCP/CDP pin has an internal pull up resistor. When DCP/CDP pin is left unconnected the BC 1.2 controller will be in CDP mode.
Pin 11 (DCP/CDP) | CDP | DCP |
---|---|---|
Low | NO | YES |
High | YES | NO |