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.
Contents[hide] |
Page 1 Front page
Frontpage with photo and index, version index, (C) mambojambo
Page 2 CPU, Camera, Accelerometer
- D4800 - OMAP3430 - N900 Hardware CPU
- N5820 - Camera cover switch
- N5801/2 - Main/secondary camera multiplexers (Digital, switch CSI_A_B(3:0) bus)
- N7001 - LIS302DL - N900 Hardware Accelerometer
- N5810 - - N900 Hardware Flash
Page 3 Memory
- 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
- N4022 - Analog switch, used to switch between TV out and headphones.
- N4051 - Speaker amplifier
- N4040 - Stereo audio codec N900 Hardware Audio Codec
- N6180 - FM transmitter N900 Hardware FM radio transmitter
- N4070 - Headphone amplifier
Page 9
- N6543 - 2.8V regulator with enable, provides power to:
- G6450 - 38.4MHz VCTCXO - clock for BT and WLAN modules automatically enabled when either require clock, through or gate to above regulator.
- N6300 - WLAN module
- N6000 - BT module / FM receiver - N900 Hardware FM Receiver
Page 10
- N6200 - GPS module
- G6200 - GPS clock - 16.368MHz
Page 11
- N2200 - Gazoo
- D2800 - Rapuyama
- D3000 - 128M NOR flash + 128M DDR - connected only to Rapuyama
Page 12
- N1540 - Reflective optical switch
- N1530 - Ambient light sensor
- N1550 - CMOS camera module
Page 13
- Aura - Vapaus, ... Cellphone components.
Page 14
Full size photo front view of PCB. (higher resolution scans to be found here [3])
Wlan nominal spectrums, various clock nominal levels.
Page 15
Full size photo rear view of PCB.(higher resolution scans to be found here [4])
More clock levels, nominal GSM and CDMA spectrum.
Page 16
Component placement front side
Page 17
Component placement rear side
Page 18
Display Flex Connector component placement
Note on component types and values
The schematics only use symbolic labels for most components, and abstract names made up by Nokia for some of the large chips (e.g. GAYA, RAPUYAMA). However at least most resistors and capacitors have their size printed next to them. So the simpler the component, the harder it gets to tell what it actually is - except for capacitors and resistors. For a lot of chips you can read the actual printing from body of component, by looking at the photos p. 14, 15 and [5].
This webpage [6] has a pretty decent list of components from a reverse engineering teardown effort by isuppli.com. Almost a BOM, if only they had added the symbolic labels or exact component locations to link back to the schematics. Comes even with links to datasheets, physical dimensions of component, etc pp.