Abstract
This paper presents an embedded SRAM design for write buffer applications in flash memories. The write buffer is implemented with a newly proposed self-adaptive timing control circuit, an area-saving sense-latch circuit and 6 T SRAM cell units. A 2 kb SRAM macro with the area of 135 μm × 180 μm is implemented in and applied to a 128 Mb NOR flash memory with the SMIC 65 nm NOR flash memory process. Both simulation and chip test results show that the SRAM write buffer is beneficial to high-density flash memory design.
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References
Harari E. Flash memory-The great disruptor! In: 2012 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC). San Francisco, CA, 2012. 10–15
Takeuchi K, Tanaka T. A dual-page programming scheme for high-speed multigigabit-scale NAND flash memories. IEEE J Solid-St Circ, 2001, 36: 744–751
Weisberg P, Wiseman Y. Using 4 kb page size for virtual memory is obsolete. In: 2009 IEEE International Conference on Information Reuse & Integration (IRI). Las Vegas, NV, 2009. 262–265
Spansion MirrorBit Write Buffer Programming and Page Buffers. Write-Page_Buffer_AN_1 May 2. 2006
Takashima D, Noguchi M, Shibata N, et al. An embedded DRAM technology for high-performance NAND flash memories. In: 2011 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC). San Francisco, CA, 2011. 536–546
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Cao, H., Huo, Z., Wang, Y. et al. A write buffer design based on stable and area-saving embedded SRAM for flash applications. Sci. China Technol. Sci. 58, 357–361 (2015). https://doi.org/10.1007/s11431-014-5725-8
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DOI: https://doi.org/10.1007/s11431-014-5725-8