N900 Hardware Power management
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=Hardware= | =Hardware= | ||
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- | + | There are four chips involved in the USB subsystem. | |
- | + | ====SoC==== | |
- | + | The System-on-a-chip is the main processor on the n900. | |
+ | This is the [http://focus.ti.com/docs/prod/folders/print/omap3530.html TI omap3430] | ||
+ | ====Gaia==== | ||
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+ | The [[N900_Hardware_Chipset|TWL4030]] is a TI companion chip to the SoC. | ||
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+ | ====USB battery charger==== | ||
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+ | The [http://focus.ti.com/docs/prod/folders/print/bq24150.html bq24150] charger from TI is a flexible charger. It, along with the PHY chip - support charging without the intervention of the SoC when the system is charging from a completely dead battery. The PHY chip detects a charger (shorted D+ and D- pins) and the charger uses this information to charge more rapidly. | ||
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+ | It also features reverse boost mode - which enables power to be supplied to a USB device connected to the N900. (up to a limit of 200mA) | ||
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+ | For more information see [[N900 Hardware Battery Charger]] | ||
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=Software= | =Software= | ||
[[Category:n900]] [[Category:n900_Hardware]] | [[Category:n900]] [[Category:n900_Hardware]] |
Revision as of 10:43, 4 June 2010
The power managment on the n900 is very complex, and involves a large number of interacting systems.
Contents |
Hardware
There are four chips involved in the USB subsystem.
SoC
The System-on-a-chip is the main processor on the n900. This is the TI omap3430
Gaia
The TWL4030 is a TI companion chip to the SoC.
USB battery charger
The bq24150 charger from TI is a flexible charger. It, along with the PHY chip - support charging without the intervention of the SoC when the system is charging from a completely dead battery. The PHY chip detects a charger (shorted D+ and D- pins) and the charger uses this information to charge more rapidly.
It also features reverse boost mode - which enables power to be supplied to a USB device connected to the N900. (up to a limit of 200mA)
For more information see N900 Hardware Battery Charger