Difference between revisions of "Renesas H8S/2161BV"

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The Renesas H8S/2161B is the embedded controller chip found in many ThinkPad models.  It controls various low-bandwidth devices such as keyboard, mouse, [[How to control fan speed|system fan]], [[thermal sensors]], [[Analog Devices ADXL320 accelerometer|accelerometer]], [[Batteries|intelligent Li-Ion batteries]], [[ibm-acpi|LEDs]] and switches.  It hosts the firmware responsible for the [[Active Protection System]] and [[tp_smapi#Battery_status_features|advanced battery control]].
 
The Renesas H8S/2161B is the embedded controller chip found in many ThinkPad models.  It controls various low-bandwidth devices such as keyboard, mouse, [[How to control fan speed|system fan]], [[thermal sensors]], [[Analog Devices ADXL320 accelerometer|accelerometer]], [[Batteries|intelligent Li-Ion batteries]], [[ibm-acpi|LEDs]] and switches.  It hosts the firmware responsible for the [[Active Protection System]] and [[tp_smapi#Battery_status_features|advanced battery control]].
  
{{WARN|The Flash memory of the H8S/2161B is rated for just 100 guaranteed rewrite cycles. However, the Technical Update "F-ZTAT Specification Change" specifies typically 10,000 for 35 µm technology with the note: "This is an indication that rewrite operation can normally function up to this figure."}}
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{{WARN|The Flash memory of the H8S/2161B is rated for just 100 guaranteed rewrite cycles. However, the Technical Update "F-ZTAT Specification Change" specifies typically 10,000 for 35 µm technology with the note: "This is an indication that rewrite operation can normally function up to this figure."}}
  
 
== Documentation ==
 
== Documentation ==
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* [http://documentation.renesas.com/eng/products/mpumcu/apn/rej05b0397_h8s2655.pdf Renesas H8S series Technical Q&A application note]
 
* [http://documentation.renesas.com/eng/products/mpumcu/apn/rej05b0397_h8s2655.pdf Renesas H8S series Technical Q&A application note]
 
* A partial disassembly of the firmware running on this embedded controller is available in [http://forum.thinkpads.com/viewtopic.php?t=20958 this thread].
 
* A partial disassembly of the firmware running on this embedded controller is available in [http://forum.thinkpads.com/viewtopic.php?t=20958 this thread].
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== Firmware ==
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Firmware bugs are listed in the [[Embedded Controller Firmware]] page.  Firmware hacking is taking place in thinkpads.com, see above for links.
  
 
== Models containing this chip ==
 
== Models containing this chip ==
 
* ThinkPad {{T43}}, {{T43p}}
 
* ThinkPad {{T43}}, {{T43p}}
 
* ThinkPad {{R52}}
 
* ThinkPad {{R52}}
 
It is likely that all other ThinkPads with an embedded controller use the same chip.
 
  
 
== Photos ==
 
== Photos ==
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{{gallery_end}}
 
{{gallery_end}}
  
[[Category:Components]]
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[[Category:Embedded Controllers]]

Latest revision as of 15:20, 22 January 2021

Renesas H8S/2161B (H8S/2140B group)

The Renesas H8S/2161B is the embedded controller chip found in many ThinkPad models. It controls various low-bandwidth devices such as keyboard, mouse, system fan, thermal sensors, accelerometer, intelligent Li-Ion batteries, LEDs and switches. It hosts the firmware responsible for the Active Protection System and advanced battery control.

ATTENTION!
The Flash memory of the H8S/2161B is rated for just 100 guaranteed rewrite cycles. However, the Technical Update "F-ZTAT Specification Change" specifies typically 10,000 for 35 µm technology with the note: "This is an indication that rewrite operation can normally function up to this figure."

Documentation

Firmware

Firmware bugs are listed in the Embedded Controller Firmware page. Firmware hacking is taking place in thinkpads.com, see above for links.

Models containing this chip

Photos


Photos (click to see full size)
H8S/2161BV in T43