Device Memory; Wlan/Bt Interface - Nokia RM-824 Service Manual

The micro SIM interface supports both 1.8V and 3.0V micro SIM cards. The micro SIM interface voltage is first
1.8 V when the micro SIM card is inserted, and if the card does not response to the ATR (Answer to Request),
3V interface voltage is used.

Device memory

The memory components of the device are internal POP 1 GB LPDDR2, a card reader for MicroSD, and 8 GB
eMMC memory which is non-removable and internal to the phone.
The MicroSD is connected to MSM. For detection of card presence, insertion and removal there are two
switches in the MicroSD connector to enable hot swap functionality. Even though the hot swap functionality
is supported, battery has to be removed before the MicroSD can be removed/inserted.
The device uses 8 GB eMMC (D3200) external memory. The eMMC interface is an 11-wire serial/parallel data
bus which includes a clock (CLK), 8 data signals (DAT), a reset, and command (CMD) wires. The eMMC interface
is made up of the SDC2 bus from the MSM. The eMMC consists of an internal NAND controller and an MMC
controller for I/O interface. It is a dual supply device which requires VCC of 2.9V for the NAND core and VCCQ
of 1.8V for the MMC I/O interface.

WLAN/BT interface

The WCN3660 (N6301) chip provides full 802.11 a, b, g, n WLAN, BT and FM radio transceiver connectivity.
The FM RX & TX are not supported in RM-824/RM-825.
WCN is the name given to a generic technology release that combines WLAN, Bluetooth, and FM RX radio on
a single monolithic IC. The solution includes a single chip WCN3660 transceiver, a discrete 2.4 GHz WLAN/BT
RF band pass filter, a discrete RF diplexer, a discrete RF coupler, and passive SMDs (Surface Mounted Device).
The WCN3660 operates in the 2.4 GHz and 5.0 GHz (ISM), and the 76-108 MHz FM bands. The baseband part
of the connectivity functions is integrated into MSM8960.
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Figure 35 Micro SIM interface
NOKIA INTERNAL USE ONLY
Copyright © 2012 Nokia. All rights reserved.
RM-824; RM-825; RM-826
System Module
Issue 2