PDMI
 | |||
| Production history | |||
|---|---|---|---|
| Designer | CEA | ||
| Designed | February 2010 | ||
| General specifications | |||
| Length | 22 mm | ||
| Width | 2.5 mm | ||
| Hot pluggable | Yes | ||
| External | Yes | ||
| Audio signal | Analog stereo, digital DisplayPort (1–8 channels, 16- or 24-bit linear PCM; 32 to 192 kHz sampling rate) | ||
| Video signal | Digital 2-lane DisplayPort 1.1, 4.32 Gbit/s data rate | ||
| Pins | 30 pins | ||
| Data | |||
| Data signal | USB 3.0 SuperSpeed + 1 Mbit/s for the DisplayPort auxiliary channel | ||
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.[1]
Development and history
[edit]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;[2][3][4] the 2007 revision has seen only marginal use in actual devices.[5] New CEA-2017-A devices are not compatible with devices manufactured under the 2007 revision.[6]
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.[7]
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
AU X 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
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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.
 | This section's factual accuracy is disputed. (August 2011) |
| Device Name | Release Date | Notes |
|---|---|---|
| Advent Vega[8] | 19 November 2010[9] | |
| Dell Streak[10] | 4 June 2010 | |
| Boeing Black[11] | 2014.2Q[citation needed] |
Pinout
[edit]| Pin no. | Pin name | Interface grouping | Pin description |
|---|---|---|---|
| 1 | USB 5V | USB 2.0 Interface | USB Power (VBUS) |
| 2 | USB DGND | USB Ground | |
| 3 | USB D+ | Data + | |
| 4 | USB OTG | On‐The‐Go (allows device‐to‐device data transfer) | |
| 5 | USB D− | 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 Ground | |
| 8 | AUDIO RIGHT OUT | Analog Audio (input on host) |
Right analog audio output (line level) |
| 9 | AUDIO LEFT OUT | Left analog audio output (line level) | |
| 10 | AUDIO OUT GND | 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 | Signal Ground | |
| 14 | SSR+ | 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 Ground | |
| 17 | SST− | USB 3.0 Data Device Transmit | USB 3.0 SSTX− signal |
| 18 | GND | Signal Ground | |
| 19 | SST+ | 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+ | ||
| 22 | DAUX− | ||
| 23 | AP | 3.3 V DisplayPort Power (power from portable device) | |
| 24 | D1− | Main Link Lane 1 (−) | |
| 25 | GND | Signal Ground | |
| 26 | D1+ | Main Link Lane 1 (+) | |
| 27 | GND | Signal Ground | |
| 28 | D0− | Main Link Lane 0 (−) | |
| 29 | GND | Signal Ground | |
| 30 | D0+ | Main Link Lane 0 (+) |
References
[edit]- ^ CEA-2017, Common Inerconnection for Portable Media Players Archived 7 March 2012 at the Wayback Machine
- ^ CEA-2017.1, Serial Communication Protocol for Portable Electronics Devices Archived 23 September 2010 at the Wayback Machine
- ^ "To make better decisions, you need to see the big picture".
- ^ 8th MOST Interconnectivity Conference Japan (2007)
- ^ "Slacker G2 Personal Radio". Maximum PC. 16 September 2008. Retrieved 31 July 2010.
- ^ "Common Interconnection for Portable Media Players" (PDF). Consumer Electronics Association. February 2010. ANSI/CEA-2017-A. Archived from the original (PDF) on 4 May 2013. Retrieved 1 August 2012.
CEA-2017-A includes significant changes from ANSI/CEA-2017. Connectors and devices implemented using CEA-2017-A may not be compatible with those that use ANSI/CEA-2017.
- ^ "DisplayPort Technical Overview, May 2010" (PDF). VESA. 23 May 2010. Archived from the original (PDF) on 26 July 2011.
- ^ "Advent Vega forum". Archived from the original on 7 July 2012.
- ^ "Advent Vega went on Sales in UK". Engadget. 19 November 2010. Archived from the original on 24 December 2010. Retrieved 19 November 2010.
- ^ "Dell Streak PDMI Pinout".
- ^ "Boeing Black Product Card (PDF)" (PDF). Archived from the original (PDF) on 28 February 2014. Retrieved 27 February 2014.
External links
[edit]Purchase Standards
- CEA-2017 Rev A, Common Interconnection For Portable Media Players (PDMI), $75.
- CEA-2017.1 Rev 7, Serial Communication Protocol For Portable Electronic Devices, $156.
Slides
- DisplayPort Technical Overview; Slides; May 2010, contains slides about PDMI
Announcements