Difference between revisions of "CDC slot"

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(corrected some wrong guesses, and added more info regarding CDCs)
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|style="vertical-align:top;padding-right:20px;width:10px;" | [[Image:AC97CDCSlot.png|128px]] [[Image:HDACDCSlot.png|128px]] __NOTOC__
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The Communications Daughter Card slot in IBM literature or Modem Daughter Card slot (MDC) in Intel's standards, is an internal expansion slot found in older ThinkPads. Much like the MiniPCI slot, it is generally used as the 'mobile' variant of the Audio/Modem riser expansion slot.
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=== CDC slot ===
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The Communications Daughter Card slot (CDC) in IBM literature or Modem Daughter Card slot (MDC) in Intel's standards, is the mobile version of the Audio/Modem Riser slot. There are two known implementations of this slot, featuring different connectors for different platforms.
  
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Please note that all AC'97 ThinkPads with a CDC slot, utilize the Hirose DF12(5.0)-40DP-0.5V(86) connector, which is not compliant with Intel's MDC standard (specifies a TE Connectivity 3-179397-0 connector). The reason for violating the standard is unknown, but it is likely to be along the lines of IBM locking-in its customers to disallow purchasing identical CDCs from other competing manufacturers.
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The Hirose DF12(5.0)-40DP-0.5V(86) connector is used on ThinkPads with an AC'97 audio codec, while the TE Connectivity 1-1775149-2 connector is used on ThinkPads with a HD Audio codec. Something worth to note is that all AC'97 ThinkPads with a CDC slot, do not adhere to Intel's MDC standard. This is due to how it uses a proprietary Hirose connector, instead of the specified TE Connectivity 3-179397-0 connector.
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{{footnotes|
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On the other hand, all HD Audio ThinkPads with a CDC slot utilize an unknown 18-pin ACES connector. This connector was also used by other competing manufacturers, which may allow the usage of their CDCs in a HD Audio ThinkPad. However, this might trigger an 'Invalid Daughter Card' error.
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[http://en.wikipedia.org/wiki/Mobile_Daughter_Card Wikipedia article on the CDC slot]
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* [http://en.wikipedia.org/wiki/Mobile_Daughter_Card Wikipedia article on CDC]
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__NOTOC__
 
 
=== Overview ===
 
=== Overview ===
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Certain CDCs may not work in certain ThinkPads, even if they are using the same connector. This is due to a different electrical pin-out, which varies among ThinkPads. Some might even reject a CDC by displaying an 'Error 1803: Invalid Daughter Card' message.
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Not all CDCs will work in CDC slot-equipped models, even if they are using the same connector. This is due to a different electrical pin-out, which varies among ThinkPads. Some might even reject a pin-compatible CDC by displaying an 'Error 1803: Invalid Daughter Card' message, which is caused by a whitelist that is built into the BIOS (capable of being bypassed via the no-1802 utility, doesn't work on the T43(p), X41(Tablet), R52). Only some models are known to employ a CDC whitelist however, which are likely to be models released after the A30, T30, X30, and the R32. For some reason, the R40e, G40, G41, S30, and the S31 do not employ a CDC whitelist.
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HD Audio CDC slot-equipped models do not have a CDC whitelist, likely due to their limited selection of CDCs (two CDCs). This allows them to interchange CDCs freely.
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Note that all AC'97 CDCs are approximately 45 x 27 mm, and all HD Audio CDCs are approximately 34 x 26 mm. The height varies from 3-7 mm, depending on the CDC itself.
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==== Ethernet CDCs ====
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* [[Ethernet Daughter Card (EDC)]]
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==== Bluetooth CDCs ====
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* [[Bluetooth Daughter Card (BDC)]]
  
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In some cases, a CDC from a newer ThinkPad may work in an older ThinkPad, although with limited functionality. Such a case exists, as an R32 using a BMDC taken from an R40 worked with no issue. It was not able to activate its Bluetooth functionality however, due to the said electrical pin-out difference.
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==== Modem CDCs ====
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=== List of available Communication Daughter Cards===
 
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* [[Ethernet Daughter Card (EDC)]] (a second 14pin connector goes to the RJ45 socket (I guess))
 
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* [[Bluetooth Daughter Card (BDC)]] (additional 3 or 4 pin connector for what? one (or two) antenna connectors)
 
 
* [[Modem Daughter Card (MDC)]]
 
* [[Modem Daughter Card (MDC)]]
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* [[ThinkPad 56K Modem (MDC-1.5)]] (an extra header (around 4 pins?) for RJ11 socket and something else)
 
 
* [[IBM Integrated 56K Modem (MDC-2)]]
 
* [[IBM Integrated 56K Modem (MDC-2)]]
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* [[ThinkPad 56K Modem (MDC-1.5)]]
 
* [[ThinkPad Modem (MDC-3.0, 56kbps HDA)]]
 
* [[ThinkPad Modem (MDC-3.0, 56kbps HDA)]]
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* [[IBM Integrated Bluetooth II with 56K Modem (BMDC)]] (extra header and antenna connector)
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==== Modem and Bluetooth Combination CDCs ====
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* [[IBM Integrated Bluetooth II with 56K Modem (BMDC)]]
 
* [[IBM Integrated Bluetooth III with 56K Modem (BMDC-2)]]
 
* [[IBM Integrated Bluetooth III with 56K Modem (BMDC-2)]]
 
* [[IBM Integrated Bluetooth IV with 56K Modem (BMDC-3)]]
 
* [[IBM Integrated Bluetooth IV with 56K Modem (BMDC-3)]]
  
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=== See also ===
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== Models featuring this technology ==
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* [[Bluetooth Daughter Card (14 pins)]] (doesn't use the CDC slot, different connector)
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=== with an AC'97 CDC slot, supporting Ethernet controllers ===
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* {{A30}}, {{A30p}}, {{A31}}, {{A31p}}
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* {{T23}}
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* {{X22}}
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=== with an AC'97 CDC slot, supporting Ethernet and Bluetooth controllers ===
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* {{X23}}, {{X24}}
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=== with an AC'97 CDC slot, supporting SoftModem DSPs ===
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* {{R30}}, {{R31}}, {{R32}}, {{R40e}}, {{R50e}}, {{R51e}}
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* {{G40}}, {{G41}}
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* {{S30}}, {{S31}}
  
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{{gallery_start}}
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=== with an AC'97 CDC slot, supporting SoftModem DSPs and Bluetooth controllers ===
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{{thumb|T43-2686-DGU-CDC.jpg|CDC in a ThinkPad T43-2686}}
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* {{A30}}, {{A30p}}, {{A31}}, {{A31p}}
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{{thumb|dscf0118.png|analog modem 56k at cdc}}
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* {{T30}}, {{T40}}, {{T40p}}, {{T41}}, {{T41p}}, {{T42}}, {{T42p}}, {{T43}}, {{T43p}}
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{{thumb|dscf0119.png||rear cover that houses the cdc at x41}}
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* {{X30}}, {{X31}}, {{X32}}, {{X40}}, {{X41}}, {{X41 Tablet}}
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{{gallery_end}}
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* {{R40}}, {{R50}}, {{R50p}}, {{R51}}, {{R52}}
  
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=== Models featuring this technology ===
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=== with a HD Audio CDC slot ===
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* ThinkPad {{A30}}, {{A30p}}, {{A31}}, {{A31p}}
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* {{W500}}
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* ThinkPad {{G Series}}
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* {{T60}}, {{T60p}}, {{T61}}, {{T61p}}, {{T400}}, {{T410}}, {{T410i}}, {{T500}}
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* ThinkPad {{R30}}, {{R31}}, {{R32}}, {{R40}}, {{R40e}}, {{R50}}, {{R50e}}, {{R50p}}, {{R51}}, {{R51e}}, {{R52}}, {{R60}}, {{R60i}}, {{R60e}}, {{R61}}, {{R61i}}
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* {{X60}}, {{X60s}}, {{X60 Tablet}}, {{X61}}, {{X61s}}, {{X61 Tablet}}
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* ThinkPad {{S30}}, {{S31}}
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* {{R60}}, {{R60i}}, {{R60e}}, {{R61}}, {{R61i}}, {{R400}}
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* ThinkPad {{T23}}, {{T30}}, {{T40}}, {{T40p}}, {{T41}}, {{T41p}}, {{T42}}, {{T42p}}, {{T43}}, {{T43p}}, {{T60}}, {{T60p}}, {{T61}}, {{T61p}}, {{T400}}, {{T500}}
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* {{G50}}
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* ThinkPad {{W500}}
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* {{Z Series}}
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* ThinkPad {{X22}}, {{X23}}, {{X24}}, {{X30}}, {{X31}}, {{X32}}, {{X40}}, {{X41}}, {{X41T}}, {{X60}}, {{X60s}}, {{X60 Tablet}}, {{X61}}, {{X61s}}, {{X61 Tablet}}
 
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* ThinkPad {{Z Series}}
 
  
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[[Category:Components]]
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[[Category:Ports, Connectors and Slots]]

Latest revision as of 14:04, 16 November 2020

AC97CDCSlot.png HDACDCSlot.png

CDC slot

The Communications Daughter Card slot (CDC) in IBM literature or Modem Daughter Card slot (MDC) in Intel's standards, is the mobile version of the Audio/Modem Riser slot. There are two known implementations of this slot, featuring different connectors for different platforms.

The Hirose DF12(5.0)-40DP-0.5V(86) connector is used on ThinkPads with an AC'97 audio codec, while the TE Connectivity 1-1775149-2 connector is used on ThinkPads with a HD Audio codec. Something worth to note is that all AC'97 ThinkPads with a CDC slot, do not adhere to Intel's MDC standard. This is due to how it uses a proprietary Hirose connector, instead of the specified TE Connectivity 3-179397-0 connector.

FOOTNOTES [Δ]

Overview

Not all CDCs will work in CDC slot-equipped models, even if they are using the same connector. This is due to a different electrical pin-out, which varies among ThinkPads. Some might even reject a pin-compatible CDC by displaying an 'Error 1803: Invalid Daughter Card' message, which is caused by a whitelist that is built into the BIOS (capable of being bypassed via the no-1802 utility, doesn't work on the T43(p), X41(Tablet), R52). Only some models are known to employ a CDC whitelist however, which are likely to be models released after the A30, T30, X30, and the R32. For some reason, the R40e, G40, G41, S30, and the S31 do not employ a CDC whitelist.

HD Audio CDC slot-equipped models do not have a CDC whitelist, likely due to their limited selection of CDCs (two CDCs). This allows them to interchange CDCs freely.

Note that all AC'97 CDCs are approximately 45 x 27 mm, and all HD Audio CDCs are approximately 34 x 26 mm. The height varies from 3-7 mm, depending on the CDC itself.

Ethernet CDCs

Bluetooth CDCs

Modem CDCs

Modem and Bluetooth Combination CDCs

Models featuring this technology

with an AC'97 CDC slot, supporting Ethernet controllers

with an AC'97 CDC slot, supporting Ethernet and Bluetooth controllers

with an AC'97 CDC slot, supporting SoftModem DSPs

with an AC'97 CDC slot, supporting SoftModem DSPs and Bluetooth controllers

with a HD Audio CDC slot

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