[En-Nut-Discussion] Ethernut 5.0 Schematic Preview

[Harald Kipp]

Alain M. wrote:
> Harald Kipp escreveu:
>> Alain M. wrote:
>>> has anyone considerd using the RS232 drivers (ZT3243E or ST3234E in 
>>> Ethernu5) powred by 5V? It should accept 3.3V as level high without any 
>>> problem, and the ARM9 (most uP) is 5V compliant...
>> The maximum voltage on all input pins is VDDIO+0.3V or 4V.
> 
> ST's is clearly specified at 6V. And the Input logic threshold high is 
> 2.4V with VCC = 5 V

No problem with the driver, but the ARM9 will die.

Harald