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2

I'm about to change my power adapter's cable due to the classic cable fraying.

However, according to this, there's data that gets passed around using the 1-Wire protocol.

I only see 2 wires on there.

Is the cable a "smart" cable with a built-in IC, or are all logic and data pieces in the charger brick itself?

charging power magsafe

share|improve this question

asked 8 hours ago

user3247189user3247189

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add a comment | 

2

I'm about to change my power adapter's cable due to the classic cable fraying.

However, according to this, there's data that gets passed around using the 1-Wire protocol.

I only see 2 wires on there.

Is the cable a "smart" cable with a built-in IC, or are all logic and data pieces in the charger brick itself?

charging power magsafe

share|improve this question

asked 8 hours ago

user3247189user3247189

30922 silver badges1010 bronze badges

add a comment | 

I'm about to change my power adapter's cable due to the classic cable fraying.

However, according to this, there's data that gets passed around using the 1-Wire protocol.

I only see 2 wires on there.

Is the cable a "smart" cable with a built-in IC, or are all logic and data pieces in the charger brick itself?

charging power magsafe

share|improve this question

asked 8 hours ago

user3247189user3247189

30922 silver badges1010 bronze badges

share|improve this question

asked 8 hours ago

user3247189user3247189

30922 silver badges1010 bronze badges

share|improve this question

asked 8 hours ago

user3247189user3247189

30922 silver badges1010 bronze badges

asked 8 hours ago

user3247189user3247189

30922 silver badges1010 bronze badges

asked 8 hours ago

user3247189user3247189

30922 silver badges1010 bronze badges

2 Answers
2

active

oldest

votes

1

The charger's serialization and capabilities are determined by the chip in the Magsafe connector. The Mac also controls the LED, not the charger.

Understanding the charger's ID code

You can easily pull up the charger information on a Mac (Go to "About this Mac", "More Info...", "System Report...", "Power"), but much of the information is puzzling. The wattage and serial number make sense, but what about the ID, Revision, and Family? It turns out that these are part of the 1-Wire protocol used by the chip inside the connector.

share|improve this answer

edited 2 hours ago

Graham Miln

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answered 2 hours ago

Marc WilsonMarc Wilson

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0

There's no built-in IC inside the cable. All the logic behind the 1-Wire protocol happens inside the computer, the charging brick and the MagSafe connector.

You can see a teardown of the MagSafe / MagSafe 2 connectors on the link below, where the actual communication process is also explained:

http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html

share|improve this answer

edited 1 hour ago

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is incorrect. Source: righto.com/2013/06/teardown-and-exploration-of-magsafe.html
  
  – Marc Wilson
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, I was thinking that the OP is interested in repairing the cable due to fraying. The chip is inside the connector, not the cable. So it is correct that there is no IC inside the cable itself - so if you want to cut out part of the cable to remove the fraying, there's no problem in that.
  
  – jksoegaard
  1 hour ago
  
  

  
  
  
  

add a comment | 

1

The charger's serialization and capabilities are determined by the chip in the Magsafe connector. The Mac also controls the LED, not the charger.

Understanding the charger's ID code

You can easily pull up the charger information on a Mac (Go to "About this Mac", "More Info...", "System Report...", "Power"), but much of the information is puzzling. The wattage and serial number make sense, but what about the ID, Revision, and Family? It turns out that these are part of the 1-Wire protocol used by the chip inside the connector.

share|improve this answer

edited 2 hours ago

Graham Miln

29.4k55 gold badges6161 silver badges9494 bronze badges

answered 2 hours ago

Marc WilsonMarc Wilson

1,11744 silver badges66 bronze badges

add a comment | 

1

The charger's serialization and capabilities are determined by the chip in the Magsafe connector. The Mac also controls the LED, not the charger.

Understanding the charger's ID code

You can easily pull up the charger information on a Mac (Go to "About this Mac", "More Info...", "System Report...", "Power"), but much of the information is puzzling. The wattage and serial number make sense, but what about the ID, Revision, and Family? It turns out that these are part of the 1-Wire protocol used by the chip inside the connector.

share|improve this answer

edited 2 hours ago

Graham Miln

29.4k55 gold badges6161 silver badges9494 bronze badges

answered 2 hours ago

Marc WilsonMarc Wilson

1,11744 silver badges66 bronze badges

add a comment | 

The charger's serialization and capabilities are determined by the chip in the Magsafe connector. The Mac also controls the LED, not the charger.

Understanding the charger's ID code

You can easily pull up the charger information on a Mac (Go to "About this Mac", "More Info...", "System Report...", "Power"), but much of the information is puzzling. The wattage and serial number make sense, but what about the ID, Revision, and Family? It turns out that these are part of the 1-Wire protocol used by the chip inside the connector.

share|improve this answer

edited 2 hours ago

Graham Miln

29.4k55 gold badges6161 silver badges9494 bronze badges

answered 2 hours ago

Marc WilsonMarc Wilson

1,11744 silver badges66 bronze badges

share|improve this answer

edited 2 hours ago

Graham Miln

29.4k55 gold badges6161 silver badges9494 bronze badges

answered 2 hours ago

Marc WilsonMarc Wilson

1,11744 silver badges66 bronze badges

edited 2 hours ago

Graham Miln

29.4k55 gold badges6161 silver badges9494 bronze badges

edited 2 hours ago

Graham Miln

29.4k55 gold badges6161 silver badges9494 bronze badges

answered 2 hours ago

Marc WilsonMarc Wilson

1,11744 silver badges66 bronze badges

answered 2 hours ago

Marc WilsonMarc Wilson

1,11744 silver badges66 bronze badges

0

There's no built-in IC inside the cable. All the logic behind the 1-Wire protocol happens inside the computer, the charging brick and the MagSafe connector.

You can see a teardown of the MagSafe / MagSafe 2 connectors on the link below, where the actual communication process is also explained:

http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html

share|improve this answer

edited 1 hour ago

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is incorrect. Source: righto.com/2013/06/teardown-and-exploration-of-magsafe.html
  
  – Marc Wilson
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, I was thinking that the OP is interested in repairing the cable due to fraying. The chip is inside the connector, not the cable. So it is correct that there is no IC inside the cable itself - so if you want to cut out part of the cable to remove the fraying, there's no problem in that.
  
  – jksoegaard
  1 hour ago
  
  

  
  
  
  

add a comment | 

0

There's no built-in IC inside the cable. All the logic behind the 1-Wire protocol happens inside the computer, the charging brick and the MagSafe connector.

You can see a teardown of the MagSafe / MagSafe 2 connectors on the link below, where the actual communication process is also explained:

http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html

share|improve this answer

edited 1 hour ago

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is incorrect. Source: righto.com/2013/06/teardown-and-exploration-of-magsafe.html
  
  – Marc Wilson
  2 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, I was thinking that the OP is interested in repairing the cable due to fraying. The chip is inside the connector, not the cable. So it is correct that there is no IC inside the cable itself - so if you want to cut out part of the cable to remove the fraying, there's no problem in that.
  
  – jksoegaard
  1 hour ago
  
  

  
  
  
  

add a comment | 

There's no built-in IC inside the cable. All the logic behind the 1-Wire protocol happens inside the computer, the charging brick and the MagSafe connector.

You can see a teardown of the MagSafe / MagSafe 2 connectors on the link below, where the actual communication process is also explained:

http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html

share|improve this answer

edited 1 hour ago

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges

share|improve this answer

edited 1 hour ago

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges

answered 5 hours ago

jksoegaardjksoegaard

25.3k11 gold badge3131 silver badges6161 bronze badges