AMC13SecretLDCRegisters < BUCMSPublic

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*OBSOLETE*

This page documents an integrated DAQ link receiver built into the AMC13.  For firmware version v=0x10 this
works fine using the old "Wu" format DAQ link protocol.  Later versions omit the receiver as the protocol has
changed and the CMS DAQ group haven't yet developed a Xilinx-compatible receiver.

For now, if version 0x10 is programmed into the AMC13, one can take data with a loop-back fiber
plugged between the top two SFP sites and check it's integrity with the counters below.

| *Addr* | *Name* | *Descr* | *Count when working?* | *Count when not working?* |
| 0x90 | DAQLDC_WRD_CTR | Words Sent | Y | N |
| 0x91 | DAQLDC_CTRL_CTR | ?? Sent | N | Y |
| 0x91 | DAQLDC_EV_CTR | Events Sent | Y | N |
| 0x93 | DAQLDC_RCVE_WRD_CTR | Words Received | Y | N |
| 0x94 | DAQLDC_RCVE_CTRL_CTR | ?? Received | Y | N |
| 0x95 | DAQLDC_RCVE_EV_CTR | Events Received | N | Y |
| 0x96 | DAQLDC_FIFO_ERR_CTR | FIFO Errors | N | Y |
| 0x97 | DAQLDC_CRC_ERR_CTR | CRC Errors | N | Y |
| 0x98 | DAQLDC_SYNC_LOST_CTR | Sync Losses ?? | N | Y |
| 0x99 | DAQLDC_ACK_CTR | Number of acknowledged packets | N | Y |
| 0x9a | DAQLDC_VAL_PCKT_CTR | Number of Valid Packets | N | Y |
| 0x9b | DAQLDC_ALL_PCKT_CTR | Total number of Packets | Y | Y |
| 0x9c | DAQLDC_BAD_PCKT_CTR | Number of Bad Packets | N | Y |
| 0x9d | DAQLDC_BACKPR_CTR | Packets dropped due to SDRAM full | N | Y |
| 0x9e | DAQLDC_CTRL_ERR_CTR | Control Errors | N | Y |



-- Main.EricHazen - 31 Aug 2012
Topic revision: r3 - 21 Oct 2014 - EricHazen