6.13.6 Block Receiver (0x16)

The block receiver command puts the digital part of receiver (bit decoder and framer) in reset mode. This is useful in an extremely noisy environment, where the noise level could otherwise cause a constant switching of the subcarrier input of the digital part of the receiver. The receiver (if not in reset) would try to catch a SOF signal, and if the noise pattern matched the SOF pattern, an interrupt would be generated, falsely signaling the start of an receive operation. A constant flow of interrupt requests can be a problem for the external system (MCU), so the external system can stop this by putting the receive decoders in reset mode.

The reset mode can be terminated in two ways:

The external system can send the enable receiver command (see Section 6.13.7).

The reset mode is automatically terminated at the end of a transmit operation.

The receiver can stay in reset after end of transmit if the RX Wait Time register (0x08) is set. In this case, the receiver is enabled at the end of the wait time following the transmit operation.