User's Manual

GL865-DUAL/QUAD V3 Hardware User Guide
1vv0301018 Rev.7 – 2013-10-30
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 50 of 78
Mod. 0805 2011-07 Rev.2
Also the UART‘s control flow pins can be usable as GPI/O.
Pin Signal I/O Function Type Input /
output
current
Default
State
ON_OFF
state
State
during
Reset
Note
1 GPO_A O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C109/DCD
2 GPO_B O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C125/RING
3 GPO_C O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C107/DSR
4 GPI_E I Configurable GPI
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C108/DTR
5 GPI_F I Configurable GPI
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C105/RTS
6 GPO_D O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C106/CTS
11.1. GPIO Logic levels
Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels.
The following table shows the logic level specifications used in the GL865-DUAL/QUAD V3
interface circuits:
Absolute Maximum Ratings -Not Functional
Parameter Min Max
Input level on any digital pin
(CMOS 1.8) when on
-0.3V +2.1V
Operating Range - Interface levels (1.8V CMOS)
Level Min Max
Input high level
1.5V 1.9V
Input low level
0V 0.35V
Output high level
1.6V 1.9V
Output low level
0V 0.2V
Current characteristics
Level Typical
Output Current 1mA
Input Current 1uA