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26 February 2002 ATLAS Muon Electronics Meeting 1
MROD: the MDT Read Out Driver
Status of MROD-1 Prototype
Adriaan König
University of Nijmegen
26 February 2002 ATLAS Muon Electronics Meeting 2
Contents
• System Overview
• MROD-1 Prototype
Status
Plans
• Names
26 February 2002 ATLAS Muon Electronics Meeting 3
System Overview
6 x MROD S-Link to ROB
TDC 1
TDC 18
CSM18 x
TDC 1
TDC 18
CSM18 x
Chamber Tower
CSM-Link
CSM-Link
26 February 2002 ATLAS Muon Electronics Meeting 4
CSM-MUX Functionality
Serial to Parallel&
Clock Domain Separator
40 Mbit/sData/Strobefrom TDC
18 x
Serial to Parallel&
Clock Domain Separator
40 Mbit/sData/Strobefrom TDC
Separator
(CSM-Link)
1 Gbit/s
1 Start bit32 Data bits 1 Parity bit 1 Stop bit35 bits @ 25 ns = 875 ns
1 Separator word (S)18 TDC data words19 words in 875 ns 87 MB/s
S1
18
CSM-MUX
26 February 2002 ATLAS Muon Electronics Meeting 5
TDC0, word 1
TDC2, word 4
TDC3, word 2
TDC0, word 1
TDC1, word 3
TDC2, word 5
TDC3, word 3
TDC3, word 0TDC2, word 0TDC1, word 0
TDC1, word 1
TDC1, word 2
TDC2, word 1
TDC2, word 2
TDC2, word 3
TDC3, word 1
Build events in a partitioned memoryfrom TDC data fragments(tdc 1) 000…000
Separator word
Separator word
Separator word
Skip (do not store)
Check (do not store) MROD Functionality
time
(tdc 0) 000…000
TDC0, word 0
26 February 2002 ATLAS Muon Electronics Meeting 6
MROD Throughput
MROD
MROD-in
MROD-out
Average 5 hits per TDC + header + trailer = 7 words/eventPer tower of 6 chambers max. 88 TDCs * 7 600 words/event (= 2.4 kB/event)Worst case est.: @ 100 kHz L1A rate 240 MB/s per MRODCalculation based on actual tower layout (J.Chapman): max. rate < 60 MB/s per MROD
CSM-Link
S-Link
CSM-Link
CSM-Link
CSM-Link
CSM-Link
CSM-Link
MROD-in
MROD-in
26 February 2002 ATLAS Muon Electronics Meeting 7
MROD Form Factor• 9 U VME board (single slot), 6 CSM Inputs, 1 S-Link Output• Optionally 2 extra CSM Inputs with “extension” board to accommodate some special towers with > 6 chambers• CSM Input Interfaces integrated on main board
• 1 MROD Crate (Sub rack) contains: 12 MRODs (12 Segments) Up to 4 MROD extension boards 1 Crate Master with Ethernet Interface (DetDAQ) 1 TIM: TTC-Rx Interface Module (incl. ROD Busy)
• @ 192 towers: 192/12 = 16 MROD Crates (1 per Sector)
26 February 2002 ATLAS Muon Electronics Meeting 8
MROD Crate
LDAQ MROD MROD… total ...12 x
6 CSMs 6 CSMs
TTCrxInterface Module
ROD BusyROB ROB
DAQ / DCS
VME-bus
One MROD Crate services 12 towers (e.g. one full sector). In total 16 crates will be required for all MDT chambers. Some MRODs may have 7 or 8 input links via “slave” MROD input cards.
From TTC system
“TIM-bus”
Network
26 February 2002 ATLAS Muon Electronics Meeting 9
MROD-1Prototype
Memory
SHARC
FPGA
SHARC(2x)
MemoryFPGA
3x (in total)
VME64x
TTCInterface
Memory
SHARC
FPGA
MemoryFPGA
Sharc Links
26 February 2002 ATLAS Muon Electronics Meeting 10
MROD-1 Prototype Form Factor• 9 U VME boards, 2 units wide
• 1 S-Link output on daughter board
• 6 S-Link inputs on daughter boards
• SHARC II (ADSP21160) DSPs: (3 for input, 2 for output processing) • Altera APEX FPGAs, 200k gates• TIM bus over special P3 back plane• VME64x interface
Motherboard
Output
Input
Input
Input
S-Linkdaughterboards
26 February 2002 ATLAS Muon Electronics Meeting 11
MROD-1 Prototype Status
• MROD-1 module exists.
• FPGA code has been tested, debugged and verified.
• Quite a few problems with SHARC-II DSPs: work-arounds being implemented; testing continues.
• More MROD-1 modules will be available soon.
• More software tools are being developed.
26 February 2002 ATLAS Muon Electronics Meeting 12
MROD-in board
26 February 2002 ATLAS Muon Electronics Meeting 13
MROD-out board
26 February 2002 ATLAS Muon Electronics Meeting 14
MROD-in power-up modification
26 February 2002 ATLAS Muon Electronics Meeting 15
Detail power-up modification
26 February 2002 ATLAS Muon Electronics Meeting 16
MROD-1 Prototype Plans
• Read out of BOL chambers in NIKHEF cosmic ray test stand with TDC32 chips and special CSM-MUX.
• Read out of BOL test stand chamber @ NIKHEF with ASD mezzanine cards through CSM adapter box and special CSM-MUX.
• Direct read out of ASD mezzanine cards with “final” CSM and MROD-1 with CSM-Link interface (“next” MROD-1 prototype).
26 February 2002 ATLAS Muon Electronics Meeting 17
Next MROD-1 Prototype
• Same 9 U VME board, 2 units wide • 1 S-Link output on daughter board
• 6 CSM-Link inputs on daughter boards
• Reprogramming of MROD-in FPGAs
Motherboard
Output
Input
Input
Input
CSM-Linkdaughterboards
S-Linkdaughterboard
26 February 2002 ATLAS Muon Electronics Meeting 18
MROD Names (NIKHEF and Univ.of Nijmegen)
• Marcello Barisonzi• Henk Boterenbrood• Jasper Hendriks• Peter Jansweijer• Gerard Kieft• Adriaan König• Jos Vermeulen• Thei Wijnen