Browsing by Author "Fu, Chin-Ming"

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A 1 Tbit/s Bandwidth 1024 b PLL/DLL-Less eDRAM PHY Using 0.3 V 0.105 mW/Gbps Low-Swing IO for CoWoS Application
(2014-04-01)
Lin, Mu-Shan
;
Tsai, Chien-Chun
;
Chang, Chih-Hsien
;
Huang, Wen-Hung
;
Hsu, Ying-Yu
A 1 Tbit/ s bandwidth PHY is demonstrated through CoWoS(TM) platform. Two chips: SOC and embedded DRAM ( eDRAM), have been fabricated in TSMC 40 nm CMOS technology and stacked on a silicon interposer chip. 1024 DQ buses operating at 1.1 Gbit/ s with VDDQ = 0.3 V are proven between SOC chip and eDRAM chip in experimental results with 1 mm signal trace length on the silicon interposer. A novel timing compensation mechanism is presented to achieve a low- power and small area eDRAM PHY that excludes PLL/ DLL but retains good timing margin. Another data sampling alignment training approach is employed to enhance timing robustness. A compact low- swing IO also achieves power efficiency of 0.105 mW/ Gbps.