Editing N900 Hardware Chipset

Warning: You are not logged in. Your IP address will be recorded in this page's edit history.
The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision Your text
Line 1: Line 1:
-
The chip known as 'Gaia' in the [[N900 Hardware Schematic|schematics]] is the companion chip to the processor.
+
The chip known as 'Gaia' in the schematics is the companion chip to the processor.
 +
=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.
-
==Hardware==
+
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 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.
+
It seems to be documented - not under this part number - at [http://focus.ti.com/docs/prod/folders/print/tps65950.html TIs website]
-
A datasheet for the [http://focus.ti.com/docs/prod/folders/print/tps65950.html TIs TPS65950] is at TIs website.
+
A quick check indicates the I2C bus addresses match - see 13.3 in above datasheet.
-
The USB PHY is not 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]]
+
If this is the correct part, the following description applies:
-
The TPS65950 contains:
+
 
 +
The TPS65950 contains;
* Power management
* Power management
** Several regulators - switched mode and LDO.
** Several regulators - switched mode and LDO.
Line 16: Line 19:
** Several power amplifiers.
** Several power amplifiers.
** Microphone amplifiers
** Microphone amplifiers
-
* USB transceiver
+
* USB tranciever
-
** Highspeed OTG compatible with integrated charge pump, and carkit support, designed for direct connection to the CPU. (not used in N900)
+
** Highspeed OTG compatible with integrated charge pump, and carkit support, designed for direct connection to the SoC.
* an ac/USB charger
* an ac/USB charger
* LED drivers
* LED drivers
Line 25: Line 28:
* GPIO
* GPIO
** This can support switches, keypads, ...
** This can support switches, keypads, ...
-
 
-
===Connections===
 
-
 
-
It is connected to the [[N900 Hardware Bus I2C|I2C]] bus.
 
[[Category:N900 Hardware]]
[[Category:N900 Hardware]]

Learn more about Contributing to the wiki.


Please note that all contributions to maemo.org wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see maemo.org wiki:Copyrights for details). Do not submit copyrighted work without permission!


Cancel | Editing help (opens in new window)
Retrieved from "https://wiki.maemo.org/N900_Hardware_Chipset"