N900 Hardware Chipset

Revision as of 23:29, 7 June 2010

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

The TWL5030B is the companion chip to the CPU. It can be seen in [1] and has USB PHY, power management and audio codec.

It is also known as the TPS65950.

A datasheet for the TIs TPS65950 is at TIs website.

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

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, ...

It is connected to the I2C bus.

@@ Line 1: / Line 1: @@
 The chip known as 'Gaia' in the schematics is the companion chip to the processor.
 =Hardware=
-The TWL5030B, see [http://people.openmoko.org/joerg/n900/images/n900_01.jpeg] aka TPS65950) has USB PHY, power management and audio codec.
+The TWL5030B is the companion chip to the CPU. It can be seen in  [http://people.openmoko.org/joerg/n900/images/n900_01.jpeg] and has USB PHY, power management and audio codec.
+It is also known as the TPS65950.
 A datasheet for the [http://focus.ti.com/docs/prod/folders/print/tps65950.html TIs TPS65950] is at TIs website.
-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]]
+The USB PHY isn't used and this function 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
 The TPS65950 contains;