User's Manual
Table Of Contents
- GC864 QUAD V2andGC864 DUAL V2Hardware User Guide
- APPLICABILITY TABLE
- 1 Introduction
- 2. Overview
- 3. GC864 Mechanical Dimensions
- 4. GC864-QUAD V2 / GC864-DUAL V2 Module Connections
- 5. Hardware Commands
- 6. Power Supply
- 7. Antenna
- 8. Logic Level Specifications
- 9. Serial Ports
- 10. Audio Section Overview
- 11. General Purpose I/O
- 11.1. GPIO Logic Levels
- 11.2. Using a GPIO Pad as INPUT
- 11.3. Using a GPIO Pad as OUTPUT
- 11.4. Using the RF Transmission Control GPIO4
- 11.5. Using the RFTXMON Output GPIO5
- 11.6. Using the Alarm Output GPIO6
- 11.7. Using the Buzzer Output GPIO7
- 11.8. Magnetic Buzzer Concepts
- 11.9. Using the Temperature Monitor Function
- 11.10. Indication of Network Service Availability
- 11.11. RTC Bypass Out
- 11.12. DAC Converter
- 11.13. ADC Converter
- 12. Assembly the GC864-QUAD V2 / GC864-DUAL V2 on the Board
- 13. Packing System
- 14. Conformity Assessment Issues
GC864 Hardware User Guide
1vv0300874 Rev.0 – 2010-01-25
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 42 of 64
MIC N 2
100nF
100nF
Single ended
Balanced
Single ended
Bias
MIC P2
100nF
100nF
Single ended
16
Balanced
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Ear MT+
Ear MT-
MIC P1
MIC N 1
Mic MT-
Mic MT+
Ear HF+
Mic HF+
Mic HF-
LOUD1
Ear HF-
LOUD2
HS
Earpiece
HF
Speaker
Fully Differential
Audio Amplifier
Fully Differential
Audio Amplifier
HS
Microphone
HF
Microphone
AUDIO 2
SECTION
AUDIO 1
SECTION
Baseband
Audio Front End
EP P1
EP N1
Single ended
Bias
Balanced
8
Balanced
GE864-QUAD V2 / GE864-DUAL V2 Audio Front End Block Diagram