Magic - Magnetometer Sensor Interface For Constant Current Driver; Power Supplies; Introduction; Using Vio For Dvdd Supply - Nokia NPL-4 Series Manual

NPL-4/5/RM-104
System Module and User Interface

MagIC - magnetometer sensor interface for constant current driver

Pad Pin Name Pin Type
D8 RegCtrl Digital
(MagIC) output
Current
output
Current
input
GND Power
supply
VBAT Power
supply

Power supplies

Introduction

The MagIC ASIC has two separate voltage supplies. DVDD is supplying digital functions
and AVDD analogue functions. The digital supply is capable of running at a voltage of
1.8V for compatibility with the BB I/O levels.
After the phone is started, the DVDD voltage is always on, since it is supplied from VIO
regulator.
AVDD can be off or on at power up depending which regulator is used for it.
Using VIO for DV
VIO is available on UEME. The digital supply is capable of running at a voltage of 1.8V for
compatibility with the BB I/O levels.

Using external regulator for AVDD

External AVDD regulation voltage level is 2.8V
The analogue supply is fed from the external regulator whose output is enabled by the
GenIa signal.
Copyright © 2005 Nokia Corporation. All rights reserved.
Page 56
Table 27: Offset strap supply interface
Pad Pin Name
Ioff+
Ioff-
supply
DD
Connection
for magnetometer offset strap constant
current driver
to magnetometer sensor offset strap
Offset strap return current (-) from
magnetometer offset strap
GND
Power supply for constant current
driver
Nokia Customer Care
Function
On/off control
Offset strap current,
positive
Offset strap current,
negative
Power supply from
battery
Issue 2 05/05