Tagsys S.A. LSP3STANDARD User Manual
Library Security Pedestal 3
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Revision 0.2
May 2009
Table 4: GPIO Pins - Electrical Characteristics Max Ratings
Parameters
Min. Typ. Max. Unit
Input Voltage Range
0
--
28
V
Input Voltage (Low Level)
0
--
0.9
V
Input Voltage (High Level)
1.5
--
28
V
Output Voltage Range
0
--
28
V
Maximum Continuous Output
Current
--
--
1.4
A
Output Over Current Protection
1.9
2.8
3.8
A
Figure 23: Internal Circuit of GPIO and External Supply Wiring in Output Mode
In output mode the LSP3 GPIO can only sink current to ground. User
needs to provide adequate DC Limited Current Supply to Port#1 and
Port#2 (Open Drain). See Figure 23 for detailed circuitry.
needs to provide adequate DC Limited Current Supply to Port#1 and
Port#2 (Open Drain). See Figure 23 for detailed circuitry.