Cypress EZ-PD CY4502, Руководство пользователя

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Introduction
CY4502 EZ-
PD™ CCG2 Development Kit Guide, Doc. No. 001-96601 Rev. *B
8
1.4 Abbreviations
Table 1-2. List of Abbreviations
Definitions and
Acrynoms
Meaning
Active cable Electronically Marked Cable Assembly with a re-driver to condition USB data signals.
Biphase Mark Code
(BMC)
Modification of Manchester code in which a zero has one transition and a one has two transitions.
Cable plug Term used to describe a PD-
capable element in a multidrop system addressed by SOP’/SOP’’ packets.
Logically, the cable plug is associated with a USB plug at one end of the cable. In a practical
implementation, the electronics may reside anywhere in the cable.
Configuration channel
(CC)
Single wire used by the BMC PHY layer signaling in Type-C.
CRC Cyclic Redundancy Check - The USB PD packet header and data shall be protected by a 32-bit CRC
DFP Downstream facing port is a USB Type-C port on a host or a hub to which devices are connected.
DVK Development kit.
EEPROM Electrically erasable programmable read-only memory.
Electronically Marked
Cable Assembly
(EMCA)
A USB Type-
C cable that uses USB PD to provide the cable’s characteristics
End Of Packet (EOP) K-code marker used to delineate the end of a packet
I
2
C Inter-integrated circuit.
Packet An entire unit of PD communication, including a preamble, SOP, payload, CRC, and EOP.
Passive cable
Cable with a USB plug on each end, at least one of which is a cable plug supporting SOP’ that does not
incorporate data bus signal conditioning circuits. Supports the Structured VDM to determine its
characteristics.
Type-C specification does not discuss passive cables that are not EMCAs.
PC Personal computer.
SBU
Sideband Use Signals are used in the Alternate Mode supported by the Type-C specification, which
enables multi-purposing of Type-C signals for alternate uses such as DisplayPort
SCL I
2
C serial clock line.
SDA I
2
C serial data line.
SDK Software development kit.
Start of packet (SOP) K-code marker used to delineate the start of a packet. Three SOP sequences are
defined: SOP, SOP’,
and SOP’’, with SOP* used to refer to all three.
SOP packet PD packet that starts with an SOP.
SOP’ packet
PD packet that starts with an SOP’; used to communicate with a cable plug at the near end/host side of
the cable.
SOP’’ packet
PD packet that starts with an SOP’’; used to communicate with a cable plug at the far end/device side of
the cable.