Level conversion circuits
The level conversion board project hosts a set of boards in VME form factor, with additional remote diagnostics/monitoring via I2C.
The most urgent (e.g. small series for end 2011) projects are:
- TTL to blocking
- Blocking to TTL
- TTL to RS422 (or RS485, tbd)
- RS422 to TTL
Technical design information
- Documents tab
- List of modules to be upgraded: 3U crates replacement
Repeaters replacement table
Blocking
Board | Functionality | Replaced by | Replacement status |
8 channel repeater | TTL-TTLbar-Blocking to Blocking | conv-ttl-blo | Prototyping |
16 channel repeater | |||
CTDAC | Blocking to TTL-TTLbar | ||
LA-BLO-TTL | |||
LAF-BLO-TTL | |||
LASB-TTL-BLO | TTL-TTLbar to Blocking | ||
LA-GATE | |||
LA-TTL-BLO | |||
LAPF-TTL-BLO | TTL-TTLbar to Blocking | conv-ttl-blo with pulse width of 4us instead of 1.2us why? |
RS422-RS485
Board | Functionality | Replaced by | Replacement status |
CTDAD | TTL to RS485 transmitter | conv-ttl-rs485 | Definition |
CTDCD | TTL to RS485 transmitter | ||
CTDCR | RS422-RS485 receiver |
ISSUES*
- CTDAD: it is a must to provide fail-safe outputs and some degree of configuration to the user.
Status
Date | Event |
03-03-2010 | Start defining project in CERN BE/CO-HT wikis page 3U crates replacement |
08-03-2011 | Definition of most urgent four projects and wish for small production by end 2011. |
01-07-2011 | Start working in conv-ttl-blo. |
30-11-2011 | conv-ttl-blo schematics submitted to drawing office. |
09-12-2011 | Start working in conv-ttl-rs485. Listed the needs of RS422-RS485 to/from TTL modules replacement. |
Erik van der Bij, Carlos Gil Soriano - 09-01-2012