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 56 of 64
NOTE:
The DAC frequency is selected internally. D/A converter must not be used during
POWERSAVING.
11.12.3. Low Pass Filter Example
11.13. ADC Converter
11.13.1. Description
Pin Signal I/O Function
Internal
Pull up
Type
ADC Converters
37 ADC_IN1 AI Analog/Digital converter input A/D
38 ADC_IN2 AI Analog/Digital converter input A/D
39 ADC_IN3 AI Analog/Digital converter input A/D
The GC864-QUAD V2 / GC864-DUAL V2 module provides three Analog to Digital
Converter.
The on board A/D are 11-bit converter. They are able to read a voltage level in the
range of 0÷2 volts applied on the ADC pin input, store and convert it into 11 bit word.
Min Max Units
Input Voltage range 0 2 Volt
AD conversion - 11 bits
Resolution - < 1 mV