Charger Interface; User Interface; Touch Module - Nokia RM-596 Service Manual

Charger interface

The charger interface is a 2 mm Dynamo charger plug. Older chargers with a 3.5 mm plug are supported via
the charger adapter cable CA-44.
Charging is controlled by Dynamo charging SMPS circuit. EM ASIC is used only for waking up the system when
the charger is connected.

User interface

Touch module

This phone uses Synaptic capacitive touch series 2000 for displays.
The Synaptics DT touch module is interfaced to I2C0 bus of RAPU via level shifter (N2500). RAPU's GenIO123
is used for Touch INT. The level shifter is used in between the RAPU and Synaptics touch module for level
translation from 1.8V to 2.5V and vice versa.
The Synaptics DT touch module operates with VAUX2 -supply output from EMASIC. VIO is used for port-A supply
and VAUX2 is used for port-B supplies of the level shifter. The OE signal of the level shifter is tied to VAUX2 so
that the interfaces would be enabled once VAUX2 is available.
Whenever the user touches the touch screen, the controller raises an interrupt to RAPU which initiates I2C
transactions to identify the locations the user touches on the display.
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Figure 55 Charger interface
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RM-596
System Module
Issue 2