N900 Hardware Chipset
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The chip known as 'Gaia' in the schematics is the companion chip to the processor.
The chip known as 'Gaia' in the schematics is the companion chip to the processor.
=Hardware=
=Hardware=
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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.
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The TWL5030B, see [http://people.openmoko.org/joerg/n900/images/n900_01.jpeg] aka TPS65950) has USB PHY, power management and audio codec.
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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]]
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A datasheet for the [http://focus.ti.com/docs/prod/folders/print/tps65950.html TIs TPS65950] is at TIs website.
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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.
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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]]
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If this is the correct part, the following description applies:
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It seems to be documented - not under this part number - at
The TPS65950 contains;
The TPS65950 contains;
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** Several power amplifiers.
** Several power amplifiers.
** Microphone amplifiers
** Microphone amplifiers
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* USB tranciever
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* USB transceiver
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** Highspeed OTG compatible with integrated charge pump, and carkit support, designed for direct connection to the SoC.
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** Highspeed OTG compatible with integrated charge pump, and carkit support, designed for direct connection to the CPU. (not used in N900)
* an ac/USB charger
* an ac/USB charger
* LED drivers
* LED drivers
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* GPIO
* GPIO
** This can support switches, keypads, ...
** This can support switches, keypads, ...
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==Connections==
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It is connected to the [[N900 Hardware Bus I2C|I2C]] bus.
[[Category:N900 Hardware]]
[[Category:N900 Hardware]]

Revision as of 23:27, 7 June 2010

The chip known as 'Gaia' in the schematics is the companion chip to the processor.

Hardware

The TWL5030B, see [1] aka TPS65950) has USB PHY, power management and audio codec.

A datasheet for the TIs TPS65950 is at TIs website.


The USB PHY isn't used and is handled by the nxp1707a [2] See more information on USB

It seems to be documented - not under this part number - at

The TPS65950 contains;

  • Power management
    • Several regulators - switched mode and LDO.
  • Audio codec
    • Five DACs, two ADCs
    • Several power amplifiers.
    • Microphone amplifiers
  • USB transceiver
    • Highspeed OTG compatible with integrated charge pump, and carkit support, designed for direct connection to the CPU. (not used in N900)
  • 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, ...

Connections

It is connected to the I2C bus.

Retrieved from "https://wiki.maemo.org/N900_Hardware_Chipset"