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. General Purpose I/O
The general-purpose I/O pads can be configured to act in three different ways:
• Input
• Output
• Alternate function (internally controlled)
Input pads can only be read and report the digital value (high or low) present on the
pad at the read time; output pads can only be written or queried and set the value of
the pad output; an alternate function pad is internally controlled by the GC864-QUAD
/ PY firmware and acts depending on the function implemented.
The following GPIO are available on the GC864-QUAD and GC864-PY:
Pin Signal I/O Function Type
Input /
output
current
Default
State
ON_OFF
state
State
during
Reset
Note
70 TGPIO_01 I/O GPIO01 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
74 TGPIO_02 I/O GPIO02 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
Alternate function
(JDR)
66 TGPIO_03 I/O GPIO03 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
59 TGPIO_04 I/O GPIO04 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
Alternate function
(RF Transmission
Control)
78 TGPIO_05 I/O GPIO05 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
Alternate function
(RFTXMON)
68 TGPIO_06 I/O GPIO06 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT Pict 01 1
Alternate function
(ALARM)
73 TGPIO_07 I/O GPIO07 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
Alternate function
(BUZZER)
67 TGPIO_08 I/O GPIO08 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
76 TGPIO_09 I/O GPIO09 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
63 TGPIO_10 I/O GPIO10 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
57 TGPIO_11 I/O GPIO11 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
62 TGPIO_12 I/O GPIO12 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
77 TGPIO_13 I/O GPIO13 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
60 TGPIO_14 I/O GPIO14 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
61 TGPIO_15 I/O GPIO15 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
75 TGPIO_16 I/O GPIO16 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
71 TGPIO_17 I/O GPIO17 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
65 TGPIO_18 I/O GPIO18 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
56 TGPIO_19 I/O GPIO19 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
58 TGPIO_20 I/O GPIO20 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0
72 TGPIO_21 I/O GPIO21 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 1
64 TGPIO_22 I/O GPIO22 Configurable GPIO
CMOS 1.8V
(not 2.8V !!)
1uA / 1mA INPUT 0
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 50 of 69