N900 Hardware Schematic

An N900 schematic appears to be at [1]

This might not be the exact version of the schematic used to make the phone.

Revision is given as 2JH_21A on the schematic. However, the pictured PCB in the schematic is 2JH_20 - see above the third row from the right keys. A dissasembled purchased n900 showed a revision number of 2JH_21[2].

This is a brief list of what's where on the schematic. It generally only includes major components, and any minor components that have a direct bearing on software.

Page 2

• D4800 - OMAP3430 - N900 Hardware CPU
• N5820 - Camera cover switch
• N5801/2 - Main/secondary camera switches (Digital, switch CSI_A_B(3:0) bus)
• N7001 - LIS302DL - N900 Hardware Accelerometer
• N5810 - - N900 Hardware Flash

Page 3

• N5210 - uSD hotswap detector
• D4800 - OMAP3430 - N900 Hardware CPU
• D5000 - Combo memory - 64M*32 DDR, 128M*16 Flash. (POP?)
• D5200 - eMMC 32Gb.

Page 4

• Gaia - TWL4030 - N900 Hardware Chipset
• N4290 - 2.5V regulator with enable.
• G4246 - 19.2MHz TXCO
• N4242 - 2.8V regulator with enable.
• M4270 - Vibrator motor
• D4280 - USB PHY - N900 Hardware USB
• N1130 - Fuel Guage - N900 Hardware Charge Meter
• N1140 - Battery Charger - N900 Hardware Battery Charger
• R1129+R1130 - Sense resistor for Fuel Guage.
• R1110 - 10K thermistor in parallel with 1n to ground, to ADCIN0 on GAIA - Battery temp?

Page 5

• N1510 - Touchscreen controller N900 Hardware Touchscreen

Page 6

• N1322 - R&D mode LED driver.
• N1301 - LED driver - keyboard, notification - N900 Hardware LED

Page 7

• S4311/2 - Volume keys
• S4313 - Lock switch
• S4301 - Power button
• S4314 - Capture key (two level)
• Qwerty keyboard

Page 8

A crossreference.

• Gaia - the twl4030 main power supply and audio codec chip. See N900_Hardware_Power_management.
• Rapuyama - The main phone chipset.
• Battery monitor chip BQ27200. See N900 Hardware Charge Meter.
• Battery charger/boost chip BQ24150. See N900 Hardware Battery Charger
• USB PHY - NXP1707A. See N900 Hardware USB PHY