Editing N900 Hardware Power management
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- | The power managment on the | + | The power managment on the n900 is very complex, and involves a large number of interacting systems. |
- | + | =Hardware= | |
+ | The TWL4030 (to be precise the TWL5030B, see [http://people.openmoko.org/joerg/n900/images/n900_01.jpeg] aka TPS65950) has USB PHY, power managment and audio codec. | ||
- | + | The USB PHY isn't used and is handled by the nxp1707a [http://www.spinics.net/lists/linux-usb/msg25167.html] See [[N900_Hardware_USB|more information on USB]] | |
- | + | It seems to be documented - not under this part number - at [http://focus.ti.com/docs/prod/folders/print/tps65950.html TIs website] | |
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- | + | A quick check indicates the I2C bus addresses match - see 13.3 in above datasheet. | |
- | + | If this is the correct part, the following description applies: | |
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- | The | + | The TPS65950 contains; |
+ | * Power management | ||
+ | ** Several regulators - switched mode and LDO. | ||
+ | * Audio codec | ||
+ | ** Five DACs, two ADCs | ||
+ | ** Several power amplifiers. | ||
+ | ** Microphone amplifiers | ||
+ | * USB tranciever | ||
+ | ** Highspeed OTG compatible with integrated charge pump, and carkit support, designed for direct connection to the SoC. | ||
+ | * an ac/USB charger | ||
+ | * LED drivers | ||
+ | * ADC | ||
+ | ** ADC can measure both input voltages to device, or voltages connected externally. | ||
+ | * RTC | ||
+ | * GPIO | ||
+ | ** This can support switches, keypads, ... | ||
+ | =Software= | ||
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- | + | [[Category:n900]] [[Category:n900_Hardware]] | |
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