Service BoardProduction Test

Rafael Nobrega

LHCb Roma1

Components Testing

• Production Nr: 165 Service Boards• Automatic procedure in C (on going)

– ELMB connections and functionalities– SPI FLash Memory (read/write)– EEPROM– PCF8575– Actel connections and functionalities– I2C lines (using CARDIAC)

Test if all components are responding and test ELMB firmware procedures

CANbus

Service Boards Overview

ELMB0 ELMB1 ELMB2 ELMB3

LVDS

Conver ters

FPGA12 test pulse lines

I2C I/ORegisters(32 bits)

12 reset lines

.

.

.

front-end line(SCL, SDA_O, SDA_I, TEST_PULSE, RESET_LINE)

12 I2C-like channels

SPISPI SPI SPI

I2C internal bus

12 I2C-like channels

3 3 3 3

- I2C internal bus

- Actel FPGA

. Test pulses

- PCF8575 (x2)

. Power-Control

. Reset lines

- EEPROM 24A00

- LVDS Converters

. Front-end lines

SPI communication

Flash Memories (x4)

CANbus

ELMBs

Power-Control

SERVICE BOARD

128b EEPROM

4MbitFlash

Memory

4MbitFlash

Memory

4MbitFlash

Memory

4MbitFlash

Memory

Service Board Components

LVDS-LVTTL

DS90LV047 (x12)

DS90LV048 (x5)

Flash Memories (x4)

Switches

MAX893L (x4)

ELMB (x4)

VME bus signals

Testing with PDM and Back-Plane

Supply, Clk40 and CANbus

Actel FPGA

16bits I2C-IO

PCF8575 (x2)

EEPROM 24A00

Test Set-up

• Small Experiment Set-up

– Back-Plane– TTCvx– TTCVI– PDM

• CANbus distribution• Clock distribution (simulated)

– Sevice Boards• 4 ELMBs

– Kvaser CANbus– CARDIACs

• Use of all I2C lines

– Control Program (C based)

Test Structure

• Test organized in classes (easy diagnostics)• Classes

– ELMB• Actel FPGA

– I2C internal bus connections– I2c communication (read/write registers)– Test-pulses (CARDIACs)

» Machine clock– ELMB Reset scheme

• Flash Memory– I2C internal bus connections– I2c communication (read/write registers)

• EEPROM– I2C internal bus connections– I2c communication (read/write registers)

• PCF8575– I2C internal bus connections– I2c communication (read/write registers)

• CARDIAC connections– I2C-like bus connections– I2c communication (read/write registers)– Test-pulse– Reset lines

ELMB(0-1-2-3)

FE

PCF8575

EEPROM

Flash Mem.

FPGA

Cosmic-Ray Test Station

• Prototype of Front-end Control System (similar to experiment)

• Long term acquisition procedures (foreseen days of acquisition)

• 6 MWPC chambers• Maximum of about 70 front-end boards• One Service Board used to control the entire station

Used also to test ELMB firmware and algorithms

ELMB firmware development and changes based on acquisition requirements

Conclusion

• The program to test the SBs is in progress– Remote and automatic test

• Test set-up will be similar to experiment– Back-plane– PDM– Service Boards

• The main procedures have been defined– ELMB– Flash Memory– EEPROM– Actel FPGA– I2C IO components– I2C lines