Voltage levels

dhouston · April 25, 2006, 1:03pm

Are Connect ME pins 5V tolerant?

Cameron · April 26, 2006, 2:09pm

Yes the newer ME modules, with part number 50000878-xx are.

Cameron

charliek · March 11, 2009, 4:54pm

The GPIO are not 5v tolerant, putting 5v on GPIO lines will damage the modules. If they were tolerant, it would list it in the HRM.

dhouston · April 26, 2006, 4:42pm

Mouser lists DC-ME4-01T-C. Is that 5V tolerant?

mohan · April 27, 2006, 12:22pm

Please can you confirm whether the Digi Connect ME- Modules with P/No: 50000878-xx are 5V compatible for TxD, RxD, and other Handshaking signals apart from Vcc(5V).

Means we can directly interface 5V Microcontroller’s UART directly to Digi Connect ME serial portion ( without a level shifter 5v <–> 3.3V).

Please confirm.

Thanks
Mohan

Cameron · April 27, 2006, 12:57pm

Vcc is NOT 5V tolerant. All of the serial and GPIO signals are. This is true for part number 50000878-xx, this includes DC-ME4-01T-C.

Cameron

dhouston · April 27, 2006, 2:24pm

> Vcc is NOT 5V tolerant. All of the serial and GPIO
> signals are. This is true for part number
> 50000878-xx, this includes DC-ME4-01T-C.
>
> Cameron

Great! Thank you.

I’ll order one to play with today.

dhansen · April 28, 2006, 7:25pm

How about the EM modules? I’m planning on connecting the EM vi SPI to a stand-alone CAN controller, which generates 5v control (SI etc.) signals.

If it is tolerant, is this due to some recent modification to the NS7520 itself, or has it always been tolerant (the current NS7520 hardware reference doc states VIH (max) = 3.6V in table 97).

Thanks,
Darrin

charliek · March 11, 2009, 5:06pm

I should also clarify. This is in respect to the ME / Wi-ME 7520 versions. For the 9210 version, the NS9210 processor is 5v tolerant, so the Connect ME 9210 module is 5v tolerant (but output is still 3.3v).