Hi there,
I am unsing the TMS 3705 to read a RF Label (of the TI same). My problem is to understand what is the first byte that I get. Throught my studies (plx look figure 3 on http://www.ti.com/lit/ds/scbs881b/scbs881b.pdf) the first byte sendo to me is DIAG Byte (it that is the byte tha informe to us if the antenna is ok) :
The SCI encoder also sends the diagnostic byte 2 ms after beginning of the charge phase. In case of a normal
operation of the antenna, the diagnostic byte AF_H is sent. If no antenna oscillation can be measured or if at
least one of the full-bridge drivers is switched off due to a detected short-circuit, the diagnostic byte FF_H is sent
to indicate the failure mode
But I´m receiving three different values, or 0xC8 or 0x50 OR 0xDO.
Where are my mistake.
tnx for all.