Keyboard Interface Electrical Characteristics; Display Connector And Interface Connections - Nokia RM-57 Service Manual

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Pin
15 GND
16 Col3

Keyboard interface electrical characteristics

Description Parameter
High-level V
IH
input voltage
Low-level V
IL
input voltage
High-level V
OH
output
voltage
Low-level V
OL
output
voltage

Display connector and interface connections

Pin
1 GND
WRX
2
3 GND
4 D0
5 D1
Page 9–36
Signal I/O
->
Min
0.65* V
DDS
-0.3
1.62
Figure 118 Display connector
Table 26 Display interface connections
Signal I/O
->
<->
<->
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Engine connection
GND
Helen3
Typ Max
V 0.3+ V
DDS
0 0.35* V
V 1.98
DDS
0 0.45
(VDDS = 1.8V)
Engine connection
Helen3
Helen3
Helen3
Kbc_3
Unit
V
DDS
V
DDS
V
V
Lcdwrx
Lcdda0
Lcdda1
RM-57/58
System Module
Notes
Notes
Row
Row
Column
Column
Notes
Write Enable
(active low)
Data
Data
Issue 1