Nokia N900 Service Manual

Figure 55 FM transmitter
High-speed USB
High-speed USB
The device can transmit and receive USB data at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-
speed (1.5Mbit/s). The external interface is the micro-B connector X5300. The interface between USB
transceiver and micro-B receptacle is the standard USB interface specified in the Universal Serial Bus
specification Rev. 2.0. The interface from the transceiver to OMAP is standard ULPI interface.
Memory card interfaces
There are two memory card interfaces. One for internal mass memory called eMMC and one for hot swappable
microSD card. Both are standard MMC/SD interfaces. Both interfaces use 48 MHz clock. MicroSD uses 4 datalines
and eMMC uses 8 datalines.
Both cards are protected against sudden battery removal with a magnetic sensor that recognizes the removal
of battery cover. When the battery cover is removed, the sensor sends an interrupt to OMAP and both memory
cards are powered down. This also enables hot swapping for microSD card.
RX-51
System Module
Issue 1 COMPANY CONFIDENTIAL Page 6 –15
Copyright © 2009 Nokia. All rights reserved.

Nokia N900 Specifications

General

RAM	256 MB
Internal Storage	32 GB
Operating System	Maemo 5
Battery	Removable Li-Ion 1320 mAh battery (BL-5J)
Weight	181 g
Network	GSM / HSPA
SIM	Mini-SIM
GPU	PowerVR SGX530
Memory Card slot	microSD, up to 16 GB (dedicated slot)
Loudspeaker	Yes, with stereo speakers
3.5mm jack	Yes
GPS	Yes, with A-GPS; Ovi Maps
Sensors	Accelerometer, proximity, compass
Talk time	Up to 6 h 30 min (2G) / Up to 4 h 30 min (3G)
Display	3.5 inches, 800 x 480 pixels
Processor	TI OMAP 3430
Camera	5 MP
Dimensions	110.9 x 59.8 x 18 mm
Connectivity	Wi-Fi 802.11 b/g, Bluetooth 2.1
Radio	Stereo FM radio
Browser	HTML, Adobe Flash