Nokia NSB-7 Series Service Manual page 85

PAMS Technical Documentation
Signal Parameter
PWRONX
ROW5/ LCD command/data
LCDCD
SCL Serial clock for LCD
SDA Serial data for LCD
LCDEN LCD enable
LCDRSTX Reset
GND
BUZZER
VBB
LIGHT
EARN
EARP
CCUT Charging control
Issue 1 06/00
Min Typ
0
0.7 x VBB
0
0.7 x VBB
0
0.7 x VBB
0
0.7 x VBB
0
0.7 x VBB
0
0
0.7 x VBB
440
0
2.7 2.8
0
0.7 x VBB
17.6
17.6
0
0.7 x VBB
ãNokia Mobile Phones Ltd.
Max Unit Notes
0.3 x VBB V Power on key
VBB
0.3 x VBB V keyboard matrix row 5
VBB LCD driver code/data
selection
0.3 x VBB V LCD driver serial clock
VBB
0.3 x VBB V LCD driver serial data
VBB
0.3 x VBB V LCD driver chip select
VBB
0.3 x VBB V LCD driver reset
VBB
0 V Ground
0.3 x VBB V PWM low level
VBB V PWM high level
4700 Hz Buzzer PWM fre-
50 % quency
PWM duty cycle
2.9 V Logic supply voltage
0.3 x VBB V Illumination control
VBB
788 mV Connected to COBBA
EARN output.
788 mV Connected to COBBA
EARP output.
0.3 x VBB Stops charging
VBB
NSB-7
UI Module
Page 5