Introduction

Timestamp?

Table of Contents

1. Problems identified
2. CROC proto 3 : Fabrication status
   1. CROC v3 prototypes : present fabrication
   2. Final Number of CROC to be produced
3. Compte-Rendus

Problems identified

• Inversion of the SDA and SCL signal between the LV010 (near RJ45 of the front face of the CROC) and the SPECS Mezzanine connector

• Adaptation of the SPECS Signal in the case when the SPECS Mezzanine is simply a repeater

• Polarisation of the 2 drivers going to the backplane for specs sda- signals. the sda- is not well polarised and the V divider on the +sda simply changes the common mode. This leads to a bad pulse when the command to the driver is released. The sda- pin has to be polarised to GND with for example a 5k resistor. Then the sda+/- signals are well polarised.

• Correct Delatcher oscillation problem

CROC proto 3 : Fabrication status

CROC v3 prototypes : present fabrication

CROC	Status	Download version(date)	Comment
1	Quick test
2	-

Final Number of CROC to be produced

Number of CROC (v3) :

Crate	Croc
ECAL	14 = 2x7
HCAL	4 = 2x2
PRS	8 = 2x4
Spare	26
Total	33

• Vérifier liste des signaux TTCrq. Voir emprunt TTCvx (Atlas) au LAL

Compte-Rendus

• Compte-Rendu Meeting 23 Nov. 05 : CROC fabrication test