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1 out driving 1 in | V=3.3*100/(100+1,000)=0.3 |
1 out driving 2 in | V=3.3*100/(100+500)=0.55 |
1 out driving 3 in | V=3.3*100/(100+333.3)=0.76 |
1 out driving 4 in | V=3.3*100/(100+250)=.94 (This is too high, so 1 output driving 3 inputs is the maximum) |
The following table illustrates describes the pinout of the GPIO on the XD233 XT243 and XD1033XT1143:
Pin | Function | Pin | Function |
|---|---|---|---|
1 | GND | 7 | GND |
2 | 3.3V | 8 | 3.3V |
3 | BUTTON 0 | 9 | BUTTON 4 |
4 | BUTTON 1 | 10 | BUTTON 5 |
5 | BUTTON 2 | 11 | BUTTON 6 |
6 | BUTTON 3 | 12 | BUTTON 7 |
The following schematic illustrates the pinout of the GPIO connector.
RJ45 LAN
The XD233 and XD1033 have an RJ45 connector for 1000BASE-T networking. The maximum length for Cat 5E cable is 100 meters; the allowed length can be higher or lower depending on the quality of the cable.
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