code: def sense_ttb(self, target):
          
          return super(Device, self).sense_ttb(target, did=b'\x01')
docs: Activate the RF field and probe for a Type B Target.
  
          The RC-S956 can discover Type B Targets (Type 4B Tag) at 106
          kbps. For a Type 4B Tag the firmware automatically sends an
          ATTRIB command that configures the use of DID and 64 byte
          maximum frame size. The driver reverts this configuration with
          a DESELECT and WUPB command to return the target prepared for
          activation (which nfcpy does in the tag activation code).