ZHCSFQ2C November 2016 – June 2018 TUSB422
PRODUCTION DATA.
The TUSB422 contains a USB Power Delivery BMC (Bi-phase Mark coded) Baseband phy. The TCPM can enable the TUSB422’s USB PD BMC phy for any of the following conditions when the TUSB422 is in Attached.SNK, Attach.SRC, DebugAccessory, or PoweredAccessory state:
The USB PD phy will always be disabled when the TUSB422 is in the unattached mode.
The TUSB422 PD BMC phy receiver threshold will be set based on the value of the POWER_ROLE field in the Message Header Info register. The default receiver threshold can be changed by setting the VIX_PD and VIX_PD_OVERRIDE fields in the PHY BMC RX Control register.
NOTE
The TUSB422 supports all PD2.0 and PD 3.0 messages except for the PD 3.0 Get Source Capabilities Extended Message. Upon receipt of this message, GoodCRC is not returned, and no Rx alert flag is set. The side effect is that the port partner will retry the message. After the retries are exhausted, the port partner will send a soft reset message.
POWER-ROLE | VIH | VIL |
---|---|---|
0 | VIH(PD_SRC) | VIL(PD_SRC) |
1 | VIH(PD_SNK) | VIL(PD_SNK) |