Rainbow Electronics GT864-PY - Manual (Page 8)

GT864-QUAD/PY Hardware User Guide
1vv0300756 Rev.0 08/ 05/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 8 of 23
Pin description:
1 VCC
2 ADC_IN (not connected in GT864-QUAD Terminal)
3 HR_IN
4 TO_IN
5 DIG_OUT (not connected in GT864-QUAD Terminal)
6 GND
Signals of Power Connector:
PIN Signal Direction Limits Description
1 VCC Input 5 – 36V Positiv power input, DC
2
ADC_IN or
not
connected
Input 5 – 36V
- No connection in GT864 Quad
version
- Analogue Input in GT864 PY
3 HR_IN Input 5 – 36V
Active high control line used to
switch off or reset the modem VIH
> 5V,
VIL < 0.5V Power off: 1s < t < 2s
Hard reset: t > 3.5s
4
TO_IN Input 5 – 36V
Positive edge triggered signal;
used to switch on the modem VIH
> 5V, VIL < 0.5V Power on: t >
0.2s
5
DIG_OUT /
or not
connected
Output 5 – 36V
- No connection in GT864 Quad
version
- Digital Output in GT864 PY
6 GND Input -
Negative power (ground) input
and return path for TO_IN and
HR_IN
3.1.2 Analogue Input GT864 PY Variant
The following command has to be used to initialise and to read the status of the analogue input:
AT#ADC=1,2,0
Response:
#ADC: <digital value> e.g. #ADC: 119
ADC_ IN
≈ 0,026V x digital value