2024年5月4日发(作者：)

USB Type-C ENGINEERING CHANGE NOTICE

Title: USB 2.0 Type-C receptacle

Applied to: USB Type-C Specification Release 1.2, Draft

20160309

Brief description of the functional changes:

Define a USB 2.0 Type-C receptacle.

Benefits as a result of the changes:

The market is demanding a USB 2.0 Type-C receptacle connector.

Opportunity for cost improvement versus full featured receptacle version.

Lower pin count can be used to space solder tails, improving inspection, rework, and the soldering process.

An assessment of the impact to the existing revision and systems that currently conform to

the USB specification:

N/A

An analysis of the hardware implications:

Allows for possible cost savings in new designs. Testing by multiple manufacturers showed no detrimental effects of

the USB 3.1 signal contacts being not present in the receptacle.

An analysis of the software implications:

N/A

An analysis of the compliance testing implications:

Adds receptacle pin configuration to the existing full featured version. No impact to test procedures.

USB Implementers Forum

Form 20140811-ECN Page:

1

USB Type-C ENGINEERING CHANGE NOTICE

Actual Change

(a). Section 2.1, Text, Page 20

From Text:

Figure 2-1 illustrates the comprehensive functional signal plan for the USB Type-C receptacle, not all signals shown

are required in all platforms or devices. As shown, the receptacle signal list functionally delivers both USB 2.0 (D+

and D−) and USB 3.1 (TX and RX pairs) data buses, USB power (V

BUS

) and ground (GND), Configuration Channel

signals (CC1 and CC2), and two Sideband Use (SBU) signal pins. Multiple sets of USB data bus signal locations in

this layout facilitate being able to functionally map the USB signals independent of plug orientation in the

receptacle. For reference, the signal pins are labeled.

To Text:

Figure 2-1 illustrates the comprehensive functional signal plan for the USB Full- Featured Type-C receptacle, not all

signals shown are required in all platforms or devices. As shown, the receptacle signal list functionally delivers both

USB 2.0 (D+ and D−) and USB 3.1 (TX and RX pairs) data buses, USB power (V

BUS

) and ground (GND),

Configuration Channel signals (CC1 and CC2), and two Sideband Use (SBU) signal pins. Multiple sets of USB data

bus signal locations in this layout facilitate being able to functionally map the USB signals independent of plug

orientation in the receptacle. For reference, the signal pins are labeled. For the USB 2.0 Type-C receptacle, the USB

3.1 signals are not implemented.

(b). Section 2.2, Text, Page 21

From Text:

The following USB Type-C receptacles and plugs are defined.

• USB Type-C receptacle for USB 2.0, USB 3.1 and full-featured platforms and devices

• USB Full-Featured Type-C plug

• USB 2.0 Type-C plug

To Text:

The following USB Type-C receptacles and plugs are defined.

• USB Type-C Full-Featured receptacle for USB 2.0, USB 3.1 and full-featured platforms and devices

• USB 2.0 Type-C receptacle for USB 2.0 platforms and devices

• USB Full-Featured Type-C plug

• USB 2.0 Type-C plug

(c). Section 3.1.1, Text, Page 27

From Text:

3.1.1 Compliant Connectors

The USB Type-C™ specification defines the following standard connectors:

• USB Type-C receptacle

• USB Full-Featured Type-C plug

• USB 2.0 Type-C plug

To Text:

3.1.1 Compliant Connectors

The USB Type-C™ specification defines the following standard connectors:

• USB Type-C Full-Featured receptacle

• USB 2.0 Type-C receptacle

• USB Full-Featured Type-C plug

• USB 2.0 Type-C plug

USB Implementers Forum

Form 20140811-ECN Page:

2