User's Manual
Table Of Contents
- GC864 Hardware User Guide
- APPLICABILITY TABLE
- 1. Introduction
- 2. Overview
- 3. GC864 Mechanical Dimensions
- 4. GC864-QUAD/PY 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. VAUX1 Power Output
- 12. DAC and ADC Section
- 13. Mounting the GC864-QUAD/PY on the Board
- 14. Packing System
- Conformity Assessment Issues
GC864 Hardware User Guide
1vv0300733 Rev.12 – 2009-06-04
11.8.4. Working Current Influence
In the component data sheet you will find the value of MAX CURRENT that represents
the maximum average current that can flow at nominal voltage without current
limitation.
In other words it is not the peak current, which could be twice or three times higher.
If driving circuitry does not support these peak values, the SPL will never reach the
declared level or the oscillations will stop.
11.9. Using the Temperature Monitor Function
11.9.1. Short Description
The Temperature Monitor is a function of the module that permits to control its
internal temperature and if properly set (see the #TEMPMON command on AT
Interface guide) it raise to High Logic level a GPIO when the maximum temperature
is reached.
11.9.2. Allowed GPIO
The AT#TEMPMON set command could be used with one of the following GPIO:
Signal Function Type
Input /
output
current
Note
TGPIO_01 GPIO01 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_03 GPIO03 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_08 GPIO08 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_09 GPIO09 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_10 GPIO10 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_11 GPIO11 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_12 GPIO12 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_13 GPIO13 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_14 GPIO14 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_15 GPIO15 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_16 GPIO16 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_17 GPIO17 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_18 GPIO18 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_19 GPIO19 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_20 GPIO20 Configurable GPIO CMOS 2.8V 1A / 1mA
TGPIO_22 GPIO22 Configurable GPIO
CMOS 1.8V
(not 2.8V !!)
1A / 1mA
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