Other Parts Discussed in Thread: DLP-7970ABP
Also known as ISO14443 B' . I need to detect and interface CD97 transit cards which do use Innovatron Protocol. We are currently using the TRF7970A as RFID transceiver in our design.
I tried setting the device in ISO14443B mode but the transceiver doesn't seem to decode the ATR. Sending a "APGEN" command yields no success either. Basically, the card appears to not be interfaced correctly by the TRF7970A.
I'm thinking I might need to set the TRF7970A in Direct Mode in order to bypass standard ISO14443B framing & checksum and provide my own. Would it be necessary in my case?
Finally, I haven't found the answer elsewhere so I'll ask here, treat it as a bonus question! Do Rev1 Calypso cards reply to a ISO14443B Inventory command (REQB or WUPB)?
Thanks.