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N900 Hardware Subsystems

There are many interacting hardware subsystems in the n900.

These can be split roughly into several areas.

Contents 1 Audio 1.1 Software 1.2 Main Speakers 1.3 Earpiece 1.4 Headset 1.5 Composite out 1.6 Bluetooth audio 2 Video 2.1 Display 2.1.1 Built in LCD 2.1.2 Composite out 2.2 Front camera (VGA) 2.3 Rear camera (5MP) 2.3.1 Rear camera LED flash 2.3.2 Rear camera warning light 2.3.3 Rear camera shutter 3 USB 4 User interaction 4.1 Accelerometer 4.2 Lock Switch 4.3 Headset Switch 4.4 Jack Switch 4.5 Camera Button 4.6 Power Button 4.7 Volume control 4.8 Rear cover presence switch 4.9 Camera cover 4.10 Keyboard 4.10.1 Keyboard Slide 4.11 Proximity sensor 4.12 Ambient Light Meter 5 Power management 5.1 Battery 5.1.1 Charge meter 5.2 Battery Charger 5.3 Gaia 5.4 CPU 6 Phone 6.1 GPS 6.2 2G/3G phone module 6.3 SIM 7 Local Network 7.1 Bluetooth 7.2 Wifi 7.3 USB Networking 8 Computing 8.1 CPU 8.1.1 Chipset 8.2 Memory 8.2.1 Flash Memory 8.2.1.1 Internal 32GB emmc 8.2.1.2 Internal 'OneNand' 256MB 8.2.1.3 External microSD card 8.2.2 RAM

Audio

Software

Most of the audio on the n900 is handled by gstreamer and pulseaudio. See the API documentation on sound

Main Speakers

Earpiece

Headset

Composite out

Bluetooth audio

Video

Display

Built in LCD

Composite out

Front camera (VGA)

Rear camera (5MP)

Rear camera LED flash

Rear camera warning light

Rear camera shutter

USB

User interaction

Accelerometer

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

Power management

Battery

Charge meter

Battery Charger

Gaia

CPU

Phone

GPS

2G/3G phone module

SIM

Local Network

Bluetooth

Wifi

USB Networking

Computing

CPU

Chipset

Memory

Flash Memory

Internal 32GB emmc

Internal 'OneNand' 256MB

External microSD card

RAM