I am looking for an HF reader board to which I can connect an external antenna. I own the STEVAL-253916B and it might be possible to modify it to accomplish this but I can't locate the Gerber files on the ST website to make sure I'm doing it correct...
Figure 1 of the ST25R3918 spec shows an AGD pin in addition to the GND_A pin. It is connected to VSS through two capacitors. I don't see this pin on the Table 1 pin assignments. What is the intention?Thanks,Ted
I want to use a MEMS oscillator driving the XTI pin instead of just a crystal between XTI and XTO. What are the specifications on the input signal? AC coupled? Amplitude? Drive impedance? Suggested circuit for a 0V to 3.3V output oscillator?
I don't have the option of using a standard crystal. The chip will be used at temperatures below which crystals can be used. I thought that I might attenuate the oscillator output with a resistor divider and then, if necessary, capacitively couple t...
