TTC Broadcast Commands

Overview

• Two broadcast command styles: long and short format
• Short format allows six user command bits
• Long format has an additional eight bit subaddress
• Two command bits optionally clocked out with ClkDes2

Possible Commands

The following is an excessive list of what we might possibly think of doing... have we missed anything?

Many commands come in pairs: start and stop some activity, ie two bit patterns each.

Might want some commands specific to one type of module and/or global to all modules?

• start/stop playback [global, PPM, CPM, JEM, CMM]
• start/stop backplane timing calibration [global, CPM, JEM]
• start/stop/zero rate histograms [PPM]?
• start/stop pipelines?? (ie freeze a module to debug read out controller)
• restart LVDS links??
• restart Glinks to RODs??
• start/stop/reset pipeline bus [PPM]??
• start/stop other diagnostic activity (eg with alternate FPGA programs loaded?)
• anything else?