Telit GE863-QUAD / GE863-PY
Hardware User guide
1vv0300697, Rev. ISSUE#0, - 21/11/05
6.2
6.3
General Design Rules
29
Microphone Biasing
29
30
31
6.3.1
6.3.2
Balanced Microphone biasing
Unbalanced Microphone biasing
6.4
Microphone buffering
32
6.4.1
6.4.2
Buffered Balanced Mic.
Buffered Unbalanced (Single Ended) Mic.
32
34
7
SPEAKER
37
7.1
Speaker lines characteristics and requirements
37
7.2
General Design rules
39
7.2.1
Noise Filtering
40
7.3
7.4
7.5
Handset earphone design
40
42
42
Hands Free earphone (low power) design
Car Kit speakerphone design
8
GENERAL PURPOSE I/O
44
44
44
45
45
8.1
8.2
8.3
8.4
Using a GPIO pad as INPUT
Using a GPIO pad as OUTPUT
Using the Alarm Output GPIO6
Using the Buzzer Output GPIO7
9
CAMERA
46
9.1
Agilent Camera
46
9.1.1
Camera interface connectors
46
9.2
Transchip Camera
48
48
51
52
53
54
9.2.1
Camera interface connectors
9.2.2
9.2.3
9.2.4
9.2.5
EVB for Agilent and Transchip camera support
Block Diagram for supported cameras
Schematic Diagrams for supported cameras
Example usage script for camera
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