Mobile_daughter_card

Mobile daughter card

Mobile daughter card

Add article description

The mobile daughter card, also known as an MDC or CDC (communications daughter card), is a notebook version of the AMR slot on the motherboard of a desktop computer. It is designed to interface with special Ethernet (EDC), modem (MDC) or bluetooth (BDC) cards.

Intel MDC specification 1.0

In 1999, Intel published a specification for mobile audio/modem daughter cards. The document defines a standard connector (AMP* 3-179397-0), mechanical elements including several form factors, and electrical interface. The 30-pin connector carries power, several audio channels and AC-Link serial data. Up to two AC'97 codecs are supported on such a card.

Several form factors are specified:

  • 45 × 27 mm
  • 45 × 37 mm
  • 55 × 27 mm with RJ11 jack
  • 55 × 37 mm with RJ11 jack
  • 45 × 55 mm
  • 45 × 70 mm

30-pin AMP* 3-179397-0 pinout

1MONO_OUT/PC_BEEPAUDIO_PWRDN2
3GNDMONO_PHONE4
5AUXA_RIGHTRESERVED6
7AUXA_LEFTGND8
9CD_GND5 Vmain10
11CD_RIGHTRESERVED12
13CD_LEFTRESERVED14
15GNDPRIMARY_DN16
173.3Vaux/dual5VD18
19GNDGND20
213.3 VmainAC97_SYNC22
23AC97_SDATA_OUTAC97_SDATA_INB24
25AC97_RESET#AC97_SDATA_INA26
27GNDGND28
29AC97_MSTRCLKAC97_BITCLK30

See also


Stub icon

This computer networking article is a stub. You can help Wikipedia by expanding it.

Stub icon

This article about wireless technology is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Mobile_daughter_card, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.