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| Carambola 2 - supply voltage tolerance https://www.8devices.com/community/viewtopic.php?f=13&t=556 |
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| Author: | FPeter [ 21 Aug 2013, 21:59 ] |
| Post subject: | Carambola 2 - supply voltage tolerance |
Hi All! Specs of Carambola 2 states that supply voltage is 3.3V. Are there anything on the 3.3V line that not tolerates up to 3.6V? Based on their documentations, the flash is 2.7-3.6V tolerant, VDD33 line of AR9331 is 2.97-3.63V tolerant, DDR2 chip runs from 1.8V so it doesnt matter... Im planning to connect a SIM5320E USB 3G modem to this board (via USB 2.0 Hi-Speed hub due to hw bug, and i need more ports too), but this modem runs from 3.4-4.2V, so the common supply voltage would be ideal somewhere between 3.5 and 3.6V - if the Carambola 2 module tolerates it... Best regards, Peter |
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| Author: | gedass [ 22 Aug 2013, 08:26 ] |
| Post subject: | Re: Carambola 2 - supply voltage tolerance |
Hi, you can connect power supply to Carambola via 1 or 2 1A diodes. |
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| Author: | FPeter [ 22 Aug 2013, 11:23 ] |
| Post subject: | Re: Carambola 2 - supply voltage tolerance |
| Author: | gedass [ 22 Aug 2013, 14:47 ] |
| Post subject: | Re: Carambola 2 - supply voltage tolerance |
Then use additional 3.3V DC/DC only for Carambola module if you want to have professional solution. |
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| Author: | FPeter [ 22 Aug 2013, 21:56 ] |
| Post subject: | Re: Carambola 2 - supply voltage tolerance |
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