User Manual

GM862-QUAD / PY Hardware User Guide
1vv0300748 Rev. 5 - 20/09/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 11 of 68
Pin Signal I/O Function
Internal
Pull up
Type
33 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 2.8V
34 GPIO9 I/O Configurable general purpose I/O pin CMOS 2.8V
35 TX_TRACE O RESERVED on GM862-QUAD, Python Debug on GM862-QUAD-PY (TX data) CMOS 2.8V
36 C109/DCD O Output for Data carrier detect signal (DCD) to DTE CMOS 2.8V
37 C104/RXD O Serial data output to DTE CMOS 2.8V
38 GPIO10 I/O Configurable general purpose I/O CMOS 2.8V
39 STAT_LED O Status indicator led Open Collector
40 GPIO11 I/O Configurable general purpose I/O pin 4.7 Kohm CMOS 2.8V
41 RX_TRACE I RESERVED on GM862-QUAD, Python Debug on GM862-QUAD-PY (RX data) CMOS 2.8V
42 GPIO12 I/O Configurable general purpose I/O pin 47 Kohm CMOS 2.8V
43 C108/DTR I Input for Data terminal ready signal (DTR) from DTE CMOS 2.8V
44 GPIO13 I/O Configurable general purpose I/O pin CMOS 2.8V
45 C105/RTS I Input for Request to send signal (RTS) from DTE CMOS 2.8V
46 GPIO3 I/O Configurable general purpose I/O pin 47 Kohm CMOS 2.8V
47 GPIO4 I/O Configurable general purpose I/O pin / TX Disable Control 4.7 Kohm CMOS 2.8V
48
GPIO5 /
RFTXMON
I/O Configurable general purpose I/O pin / Transmitter ON Monitor CMOS 2.8V
49
GPIO6
/ ALARM I/O
Configurable general purpose I/O pin /
ALARM
CMOS 2.8V
50
GPIO7
/ BUZZER I/O
Configurable general purpose I/O pin /
BUZZER
CMOS 2.8V
(1) For the exclusive use of the Technical Support Service
(2) An earphone with a 150 ohm impedance can be directly connected to EAR+ and EAR–
(3) On this pin a maximum of 10nF bypass capacitor is allowed.
Note: If not used, almost all pins should be left disconnected. The only exceptions are the following
pins:
pin signal
1,3,5,7
VBATT
2,4,8
GND
17
ON/OFF*
20
TXD
23
RESET*
37
RXD
45
RTS
1
1
RTS should be connected to the GND (on the module side) if flow control is not used