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 FM radio transmitter
FM radio receiver
Main article: N900 FM radio receiver
Bluetooth audio
Video
The GPU is a SGX530 manufactured by Imagination Technologies.
Display
Built in LCD
Main article: N900 LCD panel
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 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
Main article: N900 Hardware 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 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 | ||
| 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/