N900 Hardware Subsystems

There are many interacting hardware subsystems in the N900.

These can be split roughly into several areas.

Contents

Audio

Software

Most of the audio on the N900 is handled by gstreamer and PulseAudio. See the API documentation on sound

Main Speakers

Earpiece

Headphones

The headphone amplifier is a TPA6130a2 manufactured by Texas Instruments.

Composite out

FM radio transmitter

Main article: N900 Hardware FM Radio Transmitter


FM radio receiver

Main article: N900 Hardware FM Receiver


Bluetooth audio

Video

Display

Built in LCD

The main display is a ACX565AKM LCD panel, manufactured by Sony.

Composite out

Front camera (VGA)

Main article: N900 Hardware VGA Camera


Rear camera (5MP)

Main article: N900 Hardware Camera Sensor


Rear camera autofocus

Main article: N900 Hardware Autofocus


Rear camera LED flash

Main article: N900 Hardware Flash Torch


Rear camera warning light

Rear camera shutter

USB

Main article: N900 Hardware USB


USB socket

Main article: N900 Hardware USB Socket


User interaction

Touchscreen

The touch screen controller is a TSC 2005.

Accelerometer

Main article: N900 Hardware Accelerometer


Switches

Lock Switch

Headset Switch

Jack Switch

Camera Button

Power Button

Volume control

Rear cover presence switch

Camera cover

Keyboard

Keyboard Slide

Proximity sensor

Ambient Light Meter

Main article: N900 Hardware Light Meter


Power management

Main article: N900 Hardware Power management


Battery

Charge meter

Battery Charger

Main article: N900 Hardware Battery Charger


Gaia

CPU

Phone

Main article: N900 Hardware Phone


GPS

Main article: N900 Hardware GPS


2G/3G phone module

SIM

Local Network

Bluetooth

Main article: N900 Hardware Bluetooth


Wifi

Main article: N900 Hardware Wifi


USB Networking

Computing

CPU

Main article: N900 Hardware CPU


Many functional blocks of the CPU

Chipset

Main article: N900 Hardware Chipset


Memory

Flash Memory

Internal 32GB eMMC
Internal 'OneNand' 256MB
External microSD card

RAM

Other hardware (needs merging into hierarchy above)

(Click on device for wiki page with more information)

Device Model (Manufacturer) Description Driver
LED Controller LP5523
GPU SGX 530 (Imagination Technologies)
Power management TWL4030 (Texas Instruments)
Battery status BQ27200 (Texas Instruments) [1]
Digital Audio Data Serial Interface TLV320AIC3x

For those wanting to hack on the hardware drivers, the Maemo Kernel source code can be downloaded here:

http://repository.maemo.org/pool/fremantle/free/k/kernel/