1. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
SLB ASIC
Chikara Fukunaga (TMU)
Introduction
Structure
Input & JTAG block
Trigger block
Readout block
Prototype Development History
Version 4 submission status
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

2. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Introduction
ASIC Layout Mask Pattern
ROHM 0.35mm Gate Width CMOS processed in 9.72x9.72mm2 die
200Kgates
Four blocks are clearly seen in figure due to macro-core place and route
Input
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
JTAG
Readout
Trigger

3. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Structure
Blocks:
Trigger
Readout
JTAG
Input
20bit (+20bit)
x 4
From TTC clk,BCR,ECR, L1A
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

4. Trigger Block: Low pT (>6 GeV/c) Trigger
Doublets (w or s) WD, WS
Triplet (w) WT
Triplet (s) EI/FI ST
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
3-out-of-4
2-out-of-3
1-out-of-2

5. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Readout Block
Readout block keeps data of three Bunch crossing around trigger: Previous, Current and Next BC buffer
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
L1ID,BCID Hit Data

6. Input Block & JTAG Block
Double Mask (160bit x 2) Structure Mask=through,0,1 and test pulse pattern (TPP)
All the internal registers (total 885bit) are accessed with JTAG
All the internal registers have voting logic structure
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
voting logic

7. Prototype Development History
All versions were fabricated with 0.35mm Gate CMOS and 9.72x9.72mm2 of ROHM
Version 1 (submitted in Jan.2001, delivered in May 2001)
Used in Slice tests 2001 and 2002
Version 2 (submitted in Feb.2002, delivered in Jul. 2002)
Used in Slice tests (trigger and readout) 2003 and Beam tests 2003
Version 3 (submitted in Feb.2003, delivered in June 2003)
Trigger and Readout blocks did not work, banished
Version 4 (submitted in Feb.2004)
Two different types of place and routing for one net-list file (type 1 and 2)
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

8. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Version 1 (1/2001 to 5/2001)
Fabrication of one ASIC with three different technologies
Chip B: Full automatic place and routing PASSPORT lib. for memory, EXD lib. for random logic JTAG problem, other blocks (incl. readout) worked.
Chip C: Macro place and routing PASSPORT lib. for memory, EXD lib. for random logic Readout problem, other blocks (incl. JTAG) worked.
Chip D: Macro place and routing PASSPORT lib. for both memory and random logic Trigger block did not work, discarded
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Used for slice test in 2001,2002
EXD lib. is given by VDEC, univ. of Tokyo PASSPORT lib. is given by ROHM

9. Missing bits observed in Version 1
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
ID (12bit) Hit signals (160bit) Trigger (40bit)

10. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Debugging of Version 1
Timing problem for readout (PSC) and JTAG blocks in chip C and B were attributed commonly to
Clock path length fluctuation (timing of 0.2 to 1.6ns) in a long shift-register of PSC or JTAG
Too tight FF data load timing to allow fluctuation
We must relax load timing of FF logic with Bi-phase logic
We must optimise clock paths
Clock
Load
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

11. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Version 2 (2/2002 to 7/2002)
Prescriptions found in debugging of version 1 were involved,
Bi-phase logic for Shift reg. FF data load, and
Manual place and routing for clock distribution path.
Standard JTAG (so-called dialect was corrected)
JTAG access for all the user registers
and so forth (minor things)
After version 1 to version 4 now, we keep
PASSPORT lib. for memory cells, and
EXD lib. for random logic cells.
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

12. Debugging of Version 2 (1)
Timing problems in readout or JTAG block were solved.
Readout block worked fine.
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

13. Debugging of Version 2 (2)
20 pins of total 40bit output for ST trigger are used as adjacent input pins for WD or WT trigger. ENB signal lines to switch input/output for these 20 pins were found not to be connected at all.
Pins were valid only for output. Adjacent signals for WD and WT could not be inputted.
So far we made debug with test vectors, which did not require adjacent inputs.
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

14. Debugging of Version 2 (2)
Another minor bug in Trigger block was found.
For strip trigger, the 0-th channel of Pivot doublet was one-half channel shifted.
Track with pT = infinite becomes Df=+1.
Infinite momentum tracks must have the same channel number in two doublets.
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

15. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Version 3 (2/2003 to 6/2003)
Fix of I/O pad problem
Correction of D=0 for infinite momentum track
Increase of input delay adjust range (2 ® 3bit) 0 to 3.5clocks
Individual input delay adjustment for four input groups (so far all inputs used the same delay)
Modification of Readout output sequence
trigger bits (40bits) before hit signals (160bit)
Removal of Boundary scan registers for i/o pins (simplification)
But neither trigger nor readout block worked correctly.
The chip has been discarded quickly even full debug were not finished.
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

16. Version 4 (submitted in Feb.,2004)
Starting from Version 2 with minimum modification to fix known bugs (we have begun to design since October,2003),
Fix of I/O pad problem
Correction of D=0 for infinite momentum track
Increase of input delay adjust range (2 ® 3bit) of 0 to 3.5clocks and addition of another positive FF (new delay range of 1 to 4.5 clocks)
Individual input delay adjustment for four input groups (so far all inputs used the same delay)
Two independent place and routings (type 1 and type 2) by two different chip designers (R.Ichimiya and H.Kano) from the single net-list file
Type-1 is more optimisation to clock tree than allocation of macro cells
Type-2 is more optimisation to allocation of macro cells than clock tree
FDR of the End-cap Muon Trigger Electronics 1/Mar./04

17. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Version 4 - Type 1 and 2
FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Type 1 and Type 2 have a little difference of the layout pattern
Memory cell allocation
Lines from power frame to core (longitudinal line is prior in type 1 than type 2)
Two types are discriminated with pin no.7 (GND for type1, VDD for type 2)

18. FDR of the End-cap Muon Trigger Electronics 1/Mar./04
Version 4 schedule
Chip will be delivered in June 2004.
We intend, and hope
Debug will be completed in a month,
Check will be (must be) passed successfully
We will then order for production in summer
FDR of the End-cap Muon Trigger Electronics 1/Mar./04