Innovative Technology GA326-3, Руководство по эксплуатации

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NV9 Operations Manual GA326-4
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© Copyright Innovative Technology Limited 2005
6.2:Input and Output Hardware Circuits
Caution: The output low signal is affected by the value of the pull up resistor on the host machine interface.
Ensure your signal LOW levels comply with the 74HC CMOS series specification for reliable
operation, (see figure 4).
Figure 4 - Input and Output Circuit
•
All outputs are open collector transistors.
•
All Inputs are held high to in5v via 10K
Ω
. The input structure is a CMOS gate with anti-static
protection fitted.
Interface Logic levels Logic Low Logic High
Inputs 0V < Low < 0.5 +3.7V < High <12V
Outputs with 2K2
Ω
pull up
0.6V Pull up voltage of host interface
Maximum Current Sink 50mA per output
Table 4 - Interface Logic Levels
6.3:Software Optional Serial Interface Input and Outputs
Caution: The serial interfaces will only work if the relevant interface software is correctly installed.
Name Description
SSP TxD Vend 1
SSP RxD Inhibit 1
Table 5 - Software Optional Serial Interface Inputs and Outputs