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Need help about the TxD and RxD for CurizCore R1001H

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o0tsubasa0o

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hi , does anyone know or can tell me how much voltage is at TxD and RxD pin

the main voltage is 3.2-5VDD . and the digram shows 3.3VDD as the main voltage . so can i assume that the TxD and RxD are +3 and -3 ?
 
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