User's Manual

GE866-DUAL Hardware User Guide
1VV0301051 Rev. 2 – 2014-04-07 7
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Mod. 0805 2011-07 Rev.2
During power up the GPIOs may be subject to transient glitches.
Also the UART‘s control flow pins can be used as GPIO.
Pin Signal I/O Function Type Input /
output
current
Default
State
ON_OFF
state
State
during
Reset
Note
B2 GPO_A O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C109/DCD
B3 GPO_B O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C125/RING
A3 GPO_C O Configurable GPO
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C107/DSR
A2 GPI_E I Configurable GPI
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C108/DTR
A1 GPI_F I Configurable GPI
CMOS
1.8V
1uA/1mA INPUT 0 0
Alternate function
C105/RTS
B1 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 GE866-QUAD interface circuits:
Parameter Min Max
Input level on any digital pin
(CMOS 1.8) when on
-0.3V +2.1V
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
Level Typical
Output Current 1mA
Input Current 1uA