N900 Hardware Power management - Revision history

imported_>pali: /* USB battery charger */

2012-07-30T09:27:02Z

USB battery charger

← Older revision		Revision as of 09:27, 30 July 2012
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	===USB battery charger===		===USB battery charger===

	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.		The [http://focus.ti.com/docs/prod/folders/print/bq24150a.html bq24150a] 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 200 mA)		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 200 mA)

imported_>amigadave: add link

2011-03-04T13:45:13Z

add link

← Older revision		Revision as of 13:45, 4 March 2011
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	The power managment on the ~~n900~~ is very complex, and involves a large number of interacting systems.		The power managment on the [[Nokia N900\|N900]] is very complex, and involves a large number of interacting systems.

	==Hardware==		==Hardware==
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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.		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.

	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~~)		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 200 mA)

	For more information see [[N900 Hardware Battery Charger]]		For more information see [[N900 Hardware Battery Charger]]

imported_>amigadave: /* Software */ {{main|N900 software power management}}

2010-08-24T14:09:27Z

Software: {{main|N900 software power management}}

← Older revision		Revision as of 14:09, 24 August 2010
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	==Software==		==Software==

			{{main\|N900 software power management}}

	[[Category:N900]]		[[Category:N900]]
	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

imported_>amigadave: tidy and fix link

2010-06-16T14:30:25Z

tidy and fix link

← Older revision		Revision as of 14:30, 16 June 2010
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	The power managment on the n900 is very complex, and involves a large number of interacting systems.		The power managment on the n900 is very complex, and involves a large number of interacting systems.

	=Hardware=		==Hardware==

	====SoC====		===SoC===

	The System-on-a-chip is the main processor on the n900.		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].		This is the [http://focus.ti.com/docs/prod/folders/print/omap3530.html TI omap3430].
	For more information see [[N900 ~~Hardware~~ CPU]].		For more information see [[N900 CPU]].

	====Gaia====		===Gaia===

	The TWL4030 is a TI companion chip to the SoC.		The TWL4030 is a TI companion chip to the SoC. For more information see [[N900 Hardware Chipset]]
	For more information see [[N900 Hardware Chipset]]

	====USB battery charger====		===USB battery charger===

	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.		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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	For more information see [[N900 Hardware Battery Charger]]		For more information see [[N900 Hardware Battery Charger]]

	=Firmware=		==Firmware==

	The CPU is designed to work intimately with the companion chip, in order to implement [http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12032&contentId=4609 SmartReflex].		The CPU is designed to work intimately with the companion chip, in order to implement [http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12032&contentId=4609 SmartReflex].

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	This dramatically reduces power usage.		This dramatically reduces power usage.

	=Software=		==Software==


	[[Category:~~n900~~]] [[Category:~~n900_Hardware~~]]		[[Category:N900]]
			[[Category:N900 Hardware]]

imported_>speedevil: /* Firmware */

2010-06-04T21:19:42Z

Firmware

← Older revision		Revision as of 21:19, 4 June 2010
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	The CPU is designed to work intimately with the companion chip, in order to implement [http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12032&contentId=4609 SmartReflex].		The CPU is designed to work intimately with the companion chip, in order to implement [http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12032&contentId=4609 SmartReflex].

	This [http://www.TI.com/ TI]s method of adjusting the voltage of various portions of the chip dynamically, in order to ensure the power delivered to the many ~~seperate~~ sections of the chip is just sufficient to allow for the current needs.		This [http://www.TI.com/ TI]s method of adjusting the voltage of various portions of the chip dynamically, in order to ensure the power delivered to the many separate sections of the chip is just sufficient to allow for the current needs.

	All parts of the CPU that are not immediately in use are powered down.		All parts of the CPU that are not immediately in use are powered down.

			The CPU has well over a dozen seperate functional blocks, each of which can be powered on/off seperately.

			This dramatically reduces power usage.

	=Software=		=Software=

imported_>speedevil: /* Software */

2010-06-04T21:14:53Z

Software

← Older revision		Revision as of 21:14, 4 June 2010
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	For more information see [[N900 Hardware Battery Charger]]		For more information see [[N900 Hardware Battery Charger]]

			=Firmware=
			The CPU is designed to work intimately with the companion chip, in order to implement [http://focus.ti.com/general/docs/wtbu/wtbugencontent.tsp?templateId=6123&navigationId=12032&contentId=4609 SmartReflex].

			This [http://www.TI.com/ TI]s method of adjusting the voltage of various portions of the chip dynamically, in order to ensure the power delivered to the many seperate sections of the chip is just sufficient to allow for the current needs.

			All parts of the CPU that are not immediately in use are powered down.


	=Software=		=Software=

imported_>speedevil: N900 Hardware Power management/I2C moved to N900 Hardware Power management: Better name, no I2C content soon.

2010-06-04T11:04:51Z

N900 Hardware Power management/I2C moved to N900 Hardware Power management: Better name, no I2C content soon.

← Older revision	Revision as of 11:04, 4 June 2010
(No difference)

imported_>speedevil: /* Gaia */

2010-06-04T11:02:43Z

Gaia

← Older revision		Revision as of 11:02, 4 June 2010
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	The TWL4030 is a TI companion chip to the SoC.		The TWL4030 is a TI companion chip to the SoC.
	For more information see [[~~N900_Hardware_Chipset~~]]		For more information see [[N900 Hardware Chipset]]

	====USB battery charger====		====USB battery charger====

imported_>speedevil: /* Gaia */

2010-06-04T11:02:25Z

Gaia

← Older revision		Revision as of 11:02, 4 June 2010
Line 11:		Line 11:
	====Gaia====		====Gaia====

	The ~~[[N900_Hardware_Chipset\|~~TWL4030]] is a TI companion chip to the SoC.		The TWL4030 is a TI companion chip to the SoC.
			For more information see [[N900_Hardware_Chipset]]

	====USB battery charger====		====USB battery charger====

imported_>speedevil: /* SoC */

2010-06-04T11:01:23Z

SoC

← Older revision		Revision as of 11:01, 4 June 2010
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	The System-on-a-chip is the main processor on the n900.		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]		This is the [http://focus.ti.com/docs/prod/folders/print/omap3530.html TI omap3430].
			For more information see [[N900 Hardware CPU]].

	====Gaia====		====Gaia====