In addition to the Lock and PASS indications, the deserializer is able to monitor and detect several other RX port-specific conditions and interrupt states. This information is latched into the RX port status registers RX_PORT_STS1 (0x4D) and RX_PORT_STS2 (0x4E). There are bits to flag any change in LOCK status (LOCK_STS_CHG) or detect any errors in the control channel over the forward link (BCC_CRC_ERROR, BCC_SEQ_ERROR) which are cleared upon read. The Rx Port status registers also allow the user to monitor the presence of the stable input signal, along with parity and CRC errors, line length, and lines per video frame.