DS90UB941AS-Q1: LOCK status

Hello Ryan,

Ryan Wang said:

"LINK_DETECT" bit 0 of GENERAL_STS Register (Address = 0xC) mean signal detected from UB948?

Correct, means signal from the DES is detected and BC is locked.

Ryan Wang said:

"FPD3_LINK_RDY" bit 7 of DUAL_STS_DUAL_STS_P1 Register (Address = 0x5A) same as "LINK_DETECT" bit?

Link ready means a valid connection to the DES was detected and determined the capabilities for this DES.

Ryan Wang said:

"FPD3_TX_STS" bit 6 of DUAL_STS_DUAL_STS_P1 Register (Address = 0x5A) mean LOCK status with UB948?

This bit indicates that the SER output is active, and the DES is locked to the transmitted clock.  But It is only asserted once a valid input has been detected, and the FPD3 Transmit connection has entered the correct mode (i.e. Single vs Dual mode).

Ryan Wang said:

"RX_LOCK_DET" bit 5 of STS Register (Address = 0xC4) mean LOCK status with UB948? same as "FPD3_TX_STS"?

This bit requires both back channel link and forward channel lock, to be asserted.

Ryan Wang said:

"RX_DETECT" bit 3 of STS Register (Address = 0xC4) same as  "LINK_DETECT"  and "FPD3_LINK_RDY" ?

Yes, this is similar to reg 0x0C[0] Link Detect.