interfacing mc9s12xdp512 with GSM chipset

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interfacing mc9s12xdp512 with GSM chipset

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saladi
Contributor I
GSM CHIPSET operates at 3.8v and have open drain pins.Please give information whether we have to use level shifter for interfacing mc9s12xdp512 with GSM chipset? or Pull up resistors are enough?
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JimDon
Senior Contributor III
You should probably read AN2434 Input/Output (I/O) Pin Drivers on
HCS12 Family MCUs.

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