19 Jun
2011
19 Jun
'11
3:39 p.m.
Hi,
On 17.06.2011 10:23, Harald Welte wrote:
However, I think there's one pretty serious
problem in the hardware
design: The bus switch has something like at least 5 (rather 16Ohms) of
internal 'on' resistance between the sim card and the phone. While this
_might_ still work for I/O, nRST and CLK lines, it definitely doesn't
fly for the supply voltage (VCC).
how about using SN74CB3Q3244 or equivalent ?
it has max 9 Omhs Ron.
Regards,
Kevin