# PDMI

PDMI (Portable Digital Media Interface) is an interconnection standard for portable media players. It has been developed by CEA (Consumer Electronics Association) as ANSI/CEA-2017-A standard Common Interconnection for Portable Media Players in February 2010. Chaired by David McLauchlan from Microsoft, the standard was developed with the input or support of over fifty consumer electronics companies worldwide.

## Development and history

CEA-2017-A is the new revision of the earlier ANSI/CEA-2017 standard adopted in July 2007, which used a proprietary serial protocol based on Media Oriented Systems Transport (MOST) in-vehicle network; the 2007 revision has seen only marginal use in actual devices. New CEA-2017-A devices are not compatible with devices manufactured under the 2007 revision.
PDMI connector is intended to serve as a common interconnection between docking devices and displays and portable/nomadic devices with media playback capability. Intended host devices include docking stations for home A/V equipment, in-car entertainment systems, digital media kiosks, and hotel/in-flight entertainment systems, where PDMI aims to replace the ubiquitous iPod cradle connector.
PDMI uses a 30 pin receptacle with approximate size of 2.5 mm by 22 mm; a cradle-style connector is also defined. The PDMI connector includes the following electrical interfaces:
* 2-lane DisplayPort v1.1a with AUX Channel, Hot Plug Detect, and 3.3 V power line
* USB 3.0, USB 2.0, and USB On-The-Go
* Analog stereo line-out for legacy audio
* HDMI CEC for remote control
* High output power line from both host and portable device
DisplayPort component provides data rate of 4.32 Gbit/s and supports up to 1080p60 video and 8-channel audio playback on an attached display device, as well as EDID and display control commands. DisplayPort signal can be converted to HDMI format using active converter circuitry in the dock or external signal conversion adapter powered by 3.3 V DisplayPort power.
Power supply from both the host (docking station) and portable device allows for supporting the portable device with power and battery charging, as well as supporting accessories from the portable device.
USB 3.0 "SuperSpeed", USB 2.0, and USB On-The-Go support file transfer and device control, as well as device-to-device intercommunication.

## Devices that use PDMI

The first mass-production device from a major manufacturer to incorporate PDMI is the Dell Streak, a 5 in (130 mm) tablet device running the Android operating system version 1.6 through 2.2.
Devices that use PDMI :
| Device Name | Release Date |
| Advent Vega | 19 November 2010 |
| Dell Streak | 4 June 2010 |
| Boeing Black | 2014.2Q |

## Pinout

PDMI pinout :
| Pin no. | Pin name | Interface grouping | Pin description |
| 1 | USB 5V | USB 2.0 Interface | USB Power (VBUS) |
| 2 | USB DGND | USB 2.0 Interface | USB Ground |
| 3 | USB D+ | USB 2.0 Interface | Data + |
| 4 | USB OTG | USB 2.0 Interface | On‐The‐Go (allows device‐to‐device data transfer) |
| 5 | USB D− | USB 2.0 Interface | Data − |
| 6 | HC 5V | High-current Power (output on host) | High-current 5 V supply (1.8 A, or 3.6 A if combined with pin 15) |
| 7 | DGND / HC GND | High-current Power (output on host) | High-current Ground |
| 8 | AUDIO RIGHT OUT | Analog Audio (input on host) | Right analog audio output (line level) |
| 9 | AUDIO LEFT OUT | Analog Audio (input on host) | Left analog audio output (line level) |
| 10 | AUDIO OUT GND | Analog Audio (input on host) | Audio output ground |
| 11 | CEC | CEC | Consumer Electronic Control, for HDMI remote control |
| 12 | SSR− | USB 3.0 Data Device Receive | USB 3.0 SSRX− signal |
| 13 | GND | USB 3.0 Data Device Receive | Signal Ground |
| 14 | SSR+ | USB 3.0 Data Device Receive | USB 3.0 SSRX+ signal |
| 15 | HC 5V | High-current Power (output from host) | High-current 5 V supply (1.8 A, or 3.6 A if combined with pin 6) |
| 16 | HC GND | High-current Power (output from host) | High-current Ground |
| 17 | SST− | USB 3.0 Data Device Transmit | USB 3.0 SSTX− signal |
| 18 | GND | USB 3.0 Data Device Transmit | Signal Ground |
| 19 | SST+ | USB 3.0 Data Device Transmit | USB 3.0 SSTX+ signal |
| 20 | HPD | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Hot Plug Detect (includes interrupt function from host) |
| 21 | DAUX+ | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | AUX Channel + |
| 22 | DAUX− | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | AUX Channel − |
| 23 | AP | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | 3.3 V DisplayPort Power (power from portable device) |
| 24 | D1− | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Main Link Lane 1 (−) |
| 25 | GND | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Signal Ground |
| 26 | D1+ | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Main Link Lane 1 (+) |
| 27 | GND | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Signal Ground |
| 28 | D0− | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Main Link Lane 0 (−) |
| 29 | GND | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Signal Ground |
| 30 | D0+ | DisplayPort v1.1a Interface, 2 Lane (host is sink; device is source) | Main Link Lane 0 (+) |