Battery Interface; Camera Interface - Nokia RM-57 Service Manual

RM-57/58
System Module
The detection of RS MMC card removal/insertion is done via RS MMC cover switch. Removing RS MMC while writing
to RS MMC may corrupt data in RS MMC. RS MMC cover switch gives an interrupt to the SW while the cover is
opened or closed. After RS MMC cover lid opening (RS MMC SW signal is connected to GND via cover switch) the
SW power down the RS MMC card and switches off the RS MMC power supply (VSIM2). When the RS MMC cover
lid is closed (RS MMC SW signal is internally connected in Helen3 to 1.8V) the card should be identified if card
exists.
See Also
• RS MMC interface connections (Page 9–32)

Battery interface

The battery interface supports NMP Lynx battery interface for the BL-5C battery. This interface consists of three
connectors: VBAT, BSI and GND. BSI line is used to recognize battery capacity by a battery internal pull down
resistor.
Battery temperature is estimated by measuring separate battery temperature NTC via BTEMP line, which is
located on the transceiver PWB, in a place where phone temperature is most stabile.
For service purposes the device SW can be forced into local mode by using pull down resistors connected to the
BSI line.
See Also
• Battery connector and interface connections & electrical characteristics (Page 9–34)

Camera interface

The device uses a Mirage- X camera module. Mirage-X is a 1.3Mpixel camera with sensor resolution of 1280 x
960. The following figure shows the block diagram where CCP bus is used to transfer image data from camera
to engine. Bi-directional control bus is an SW implemented I2C interface.
Camera regulator N1470 powers digital parts of camera. VAUX power rail is for powering analogue parts of the
camera.
CAMVCTRL signal (Vctrl) is used for activating the camera module. When Vctrl is turned on High level , the camera
module enters the operation mode. When Vctrl is turned on Low level, the camera module enters the power
off mode.
CAMCLK signal feeds system clock for camera module.
Issue 1
Figure 101 Battery pin order
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