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 19 of 64
5.2. Turning OFF the GC864-QUAD V2 / GC864-DUAL V2
Turning off of the device can be done in three ways:
• by software command (see GC864-QUAD V2 / GC864-DUAL V2 Software
User Guide)
• by tying low pin ON#
Either ways, the device issues a detach request to network informing that the device
will not be reachable any more. To turn OFF the GC864 via pin ON#, this must be tied
low for at least 1000ms and then released. The same circuitry and timing for the
power on shall be used. The device shuts down after the release of the ON# pin.
The following flow chart shows the proper turnoff procedure:
TIP:
To check if the device has powered off, the hardware line PWRMON must be
monitored. When PWRMON goes low, then the device has powered off.