TTCrx Configuration

Ways to configure the TTCrx

• Via TTC system (after TTCrx ID is set)
• From PROM (the TTCdec card has one)
• Via I2C bus (new TTCrx only)

Programming model

• Aim for same programming model on all our modules (follow CPM?)
• Common software module to access/control TTCrx
• Access all TTCrx registers via I2C bus via suitable interface from VME PLD
• If using the PROM, require two registers:
  • TTCrxPROMReset: control register: reset PROM before reloading it; reload TTCrx from PROM
  • TTCrxPROMData: FIFO to write PROM data (read back new TTCrx configuration via I2C bus)
• TTCrx has ten read/writeable registers including various delays, control register and some detailed configuration registers
• TTCrx has ten read only registers including status, various error counters and (rapidly varying) bunch and event counters