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 45 of 64
“EAR_MT” Output Lines
line coupling
AC single-ended
DC differential
0dBFS normalized gain 3,7 V
pp
differential
output load resistance
16
@ -12dBFS
internal output resistance
4 (
typical
)
signal bandwidth 150 - 4000 Hz @ -3 dB
maximal full scale
differential output voltage
3,7 V
pp
(
typical
)
Rload=
open circuit
differential output voltage
925mV
pp
/ Rload=16
@ -12dBFS
volume increment 2 dB per step
volume steps 10
“EAR_HF” Output Lines
line coupling
AC single-ended
DC differential
output load resistance
8
signal bandwidth 150 - 4000 Hz @ -3 dB
maximal output power
@ battery voltage 3,6V
0.35 W
rms
/8
volume increment 2 dB per step
volume steps 10