Difference between revisions of "CDC slot"

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(corrected some wrong guesses, and added more info regarding CDCs)
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The CDC (Communications Daughter Card) slot is an internal expansion slot found in older ThinkPads.
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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.
  
It is not meant for customer upgrades.<br>
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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.
Different CDC slots exist for different functions and different form-factor cards, so you cannot just install any CDC adapter into a CDC slot.
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The types of CDC cards you can use in your system is dependent on the BIOS. If you insert a Bluetooth IV with 56K Modem from an R52 system (for instance) and place it into an R51 system which only had the Modem Daughter Card, the system refuses to boot up and displays Invalid Daughter Card.
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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.
 
* [http://en.wikipedia.org/wiki/Mobile_Daughter_Card Wikipedia article on CDC]
 
* [http://en.wikipedia.org/wiki/Mobile_Daughter_Card Wikipedia article on CDC]
 
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__NOTOC__
 
__NOTOC__
 
 
=== Overview ===
 
=== Overview ===
 +
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.
  
Cards listed here have a 40pin proprietary connector carrying signals for PCI, AC97 and USB.
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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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=== List of available Communication Daughter Cards===
Guessed size is 60×40mm and they show those two diagonal opposite screw holes.
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=== List of available Communication Daughter Cards (with 40 pin connector)===
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* [[Ethernet Daughter Card (EDC)]] (a second 14pin connector goes to the RJ45 socket (I guess))
 
* [[Ethernet Daughter Card (EDC)]] (a second 14pin connector goes to the RJ45 socket (I guess))
 
* [[Bluetooth Daughter Card (BDC)]] (additional 3 or 4 pin connector for what? one (or two) antenna connectors)
 
* [[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)]]
* [[ThinkPad 56K Modem (MDC-1.5)]] (an extra header (around 4 pins?) for RJ12 socket and something else)
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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)]]
 
* [[ThinkPad Modem (MDC-3.0, 56kbps HDA)]]
 
* [[ThinkPad Modem (MDC-3.0, 56kbps HDA)]]
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=== See also ===
 
=== See also ===
 
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* [[Bluetooth Daughter Card (14 pins)]] (doesn't use the CDC slot, different connector)
* [[Bluetooth Daughter Card (14 pins)]]
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{{gallery_start}}
 
{{gallery_start}}
 
 
{{thumb|T43-2686-DGU-CDC.jpg|CDC in a ThinkPad T43-2686}}
 
{{thumb|T43-2686-DGU-CDC.jpg|CDC in a ThinkPad T43-2686}}
 
{{thumb|dscf0118.png|analog modem 56k at cdc}}
 
{{thumb|dscf0118.png|analog modem 56k at cdc}}
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{{gallery_end}}
 
{{gallery_end}}
  
=== Models featuring this Technology ===
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=== Models featuring this technology ===
 
* ThinkPad {{A30}}, {{A30p}}, {{A31}}, {{A31p}}
 
* ThinkPad {{A30}}, {{A30p}}, {{A31}}, {{A31p}}
* ThinkPad {{Edge Series}}
 
 
* ThinkPad {{G Series}}
 
* ThinkPad {{G Series}}
* ThinkPad {{R Series}}
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* ThinkPad {{R30}}, {{R31}}, {{R32}}, {{R40}}, {{R40e}}, {{R50}}, {{R50e}}, {{R50p}}, {{R51}}, {{R51e}}, {{R52}}, {{R60}}, {{R60i}}, {{R60e}}, {{R61}}, {{R61i}}
 
* ThinkPad {{S30}}, {{S31}}
 
* ThinkPad {{S30}}, {{S31}}
* ThinkPad {{SL Series}}
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* ThinkPad {{T23}}, {{T30}}, {{T40}}, {{T40p}}, {{T41}}, {{T41p}}, {{T42}}, {{T42p}}, {{T43}}, {{T43p}}, {{T60}}, {{T60p}}, {{T61}}, {{T61p}}, {{T400}}, {{T500}}
* ThinkPad {{T23}}, {{T30}}, {{T40}}, {{T40p}}, {{T41}}, {{T41p}}, {{T42}}, {{T42p}}, {{T43}}, {{T43p}}, {{T60}}, {{T60p}}, {{T61}}, {{T61p}}, {{T400}}, {{T400s}}, {{T410}}, {{T410i}}, {{T410s}}, {{T410si}}, {{T500}}, {{T510}}, {{T510i}}
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* ThinkPad {{W500}}
* ThinkPad {{W Series}}
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* ThinkPad {{X22}}, {{X23}}, {{X24}}, {{X30}}, {{X31}}, {{X32}}, {{X40}}, {{X41}}, {{X41T}}, {{X60}}, {{X60s}}, {{X60 Tablet}}, {{X61}}, {{X61s}}, {{X61 Tablet}}
* ThinkPad {{X22}}, {{X23}}, {{X24}}, {{X30}}, {{X31}}, {{X32}}, {{X40}}, {{X41}}, {{X41T}}, {{X60}}, {{X60s}}, {{X60 Tablet}}, {{X61}}, {{X61s}}, {{X61 Tablet}}, {{X300}}, {{X301}}
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* ThinkPad {{Z Series}}
 
* ThinkPad {{Z Series}}
  
 
[[Category:Components]]
 
[[Category:Components]]

Revision as of 19:11, 22 November 2019

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.

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.

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.

Overview

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.

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.

List of available Communication Daughter Cards

See also


Photos (click to see full size)
CDC in a ThinkPad T43-2686
analog modem 56k at cdc
Dscf0119.png

Models featuring this technology