Nokia 8850 Manual Do Serviço

NSM–2

UI Module

PAMS Technical Documentation

Page  3

Issue 1  12/1999

 Nokia Mobile Phones Ltd.

UI module is implemented on same PCB board with BB–module and RF–
module. UI HW part are LCD, backlighting, audio parts, IR, keyboard,
power key and vibra.

LCD

BASEBAND

IR

        

LED

Buzzer

Keys

1

3

5

8

1

2

2

Vibra

1

IRONX

IR–module on/off

0

0.3 x VBB

V

IR on state

0.7 x VBB

VBB

Iout@2mA

FBUS_RX

IR receive pulse

0

0.3 x VBB

IR receive no pulse

0.7 x VBB

VBB

FBUS_TX

IR transmit pulse

0.7 x VBB

VBB

Iout@2mA

IR transmit no pulse

0

03 x VBB

VIBRA

From VB

0.9

1.0

1.1

V

115

140

mA

ROW (0:4) Rows

0

0.7 x VBB

0.3 x VBB

VBB

V

Keyboard matrix
row

COL (0:4)

COL0

0

0.7 x VBB

0.3 x VBB

VBB

Keyboard matrix
column

VB

Battery voltage

3.0

4.8

Battery voltage
(for lights)