USB Type-C™ / USB Power Delivery interface (UCPD) RM0444
1308/1390 RM0444 Rev 5
38 USB Type-C™ / USB Power Delivery interface (UCPD)
38.1 Introduction
The USB Type-C / USB Power Delivery interface complies with:
• Universal Serial Bus Type-C Cable and Connector Specification: release 2.0, August,
2019
• Universal Serial Bus Power Delivery specifications:
– revision 2.0, version 1.3, January 12, 2017
– revision 3.0, version 2.0, August 29, 2019
It integrates the physical layer of the Power Delivery (PD) specification, with CC signaling
method (no VBUS), for operation with Type-C cables.
38.2 UCPD main features
• Compliance with USB Type-C specification release 2.0
• Compliance with USB Power Delivery specifications revision 2.0 and 3.0
– Enabling advanced applications such as PPS (programmable power supply)
• Stop mode low-power operation support
• Built-in analog PHY
– USB Type-C pull-up (Rp, all values) and pull-down (Rd) resistors
– “Dead battery” Rd support
– USB Power Delivery message transmission and reception
– FRS (fast role swap) Rx support
• Digital controller
– BMC (bi-phase mark coding) encode and decode
– 4b5b encode and decode
– USB Type-C level detection with de-bounce, generating interrupts
– FRS detection, generating an interrupt
– DMA-compatible byte-level interface for USB Power Delivery payload, generating
interrupts
– USB Power Delivery clock pre-scaler / dividers
– CRC generation/checking
– Support of ordered sets, with a programmable ordered set mask at receive
– Clock recovery from incoming Rx stream
38.3 UCPD implementation
The devices have two UCPD controllers to support two USB Type-C ports.
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