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CERN - Jérôme Masson – 21/03 March 21, 20131SRAM Design for VFAT3/GdSP - CERN.
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Transcript of CERN - Jérôme Masson – 21/03 March 21, 20131SRAM Design for VFAT3/GdSP - CERN.
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SRAM Design for VFAT3/GdSP
CERN - Jérôme Masson – 21/03
March 21, 2013 SRAM Design for VFAT3/GdSP - CERN
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OutlineObjectivesPointers of the issueStrategy
March 21, 2013 2/9SRAM Design for VFAT3/GdSP - CERN
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ObjectivesPerform a new implementation of memory modules
for VFAT3/GdSP developmentWhy?
IBM CMOS 130 nm Dual Port
Bypass the issue
March 21, 2013 3/9SRAM Design for VFAT3/GdSP - CERN
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Pointers of the issueVFAT2 had 2 memory modules
SRAM1SRAM2
Radiation environment Hamming encoding
March 21, 2013 4/9SRAM Design for VFAT3/GdSP - CERN
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SRAM (1/3)Divide SRAM1 … in several little modules
Idea :
Available memory generator for modules
March 21, 2013 5/9SRAM Design for VFAT3/GdSP - CERN
………
M_1 M_nSRAM1
128
800 latencyread ptr write ptr
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SRAM Design for VFAT3/GdSP - CERN
SRAM (2/3)Memory implementation and control
March 21, 2013 6/9
clk
read_enwrite_en
address <6:0> data_in <63:0>
data_out <63:0>
M_1
M_1bis
64
64
128
deco
der
clk
LV1
A
wri
te_e
n read
_en ad
dre
ss
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SRAM (3/3)RECAP, first sizing
Use of the memory generatorSize of a memory module : 128 x 64
W = 156 µm ; L = 428 µmTotal area for SRAM1 (#20 modules) Area # 1.3 mm²
March 21, 2013 7/9SRAM Design for VFAT3/GdSP - CERN
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FIFO and Hamming EncodingFIFOHamming Encoding
extra bits so extra size…
March 21, 2013 8/9SRAM Design for VFAT3/GdSP - CERN
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SRAM Design for VFAT3/GdSP - CERN
Thank you for paying attention
March 21, 2013 9/9