JSSC 2012第6期Other

NAND Controller System With Channel Number Detection and Feedback for Power-Ef ﬁ

提出一种带通道数检测与反馈的NAND控制器系统，优化SSD写入速度与能耗。

写入速度提升60%，能耗降低32%

NAND控制器3D-SSD通道检测能耗优化动态频率控制

▸创新点1：NAND通道数自动检测技术（系统创新）。通过硬件检测机制实时识别当前访问的NAND通道数量，解决了多通道并行操作时的动态负载感知问题，为后续自适应控制提供关键输入。

▸创新点2：智能编程电压升压器动态优化时钟（电路创新）。基于通道数检测结果动态调整开关时钟频率，将升压器能效提升32%，同时将写入速度提高60%，实现速度与功耗的协同优化。

▸创新点3：动态I/O频率控制方案（系统创新）。根据激活通道数分级调节I/O接口频率，在24通道并行操作时仍将总功耗控制在3.5W以内，突破高通道数SSD的功耗瓶颈。

▸创新点4：3D集成SSD的跨层协同设计（方法创新）。通过通道检测、电压调节与I/O控制的闭环反馈系统，首次在3D-SSD中实现编程电压生成器与I/O子系统的联合优化。

Abstract

This paper proposes a NAND controller system with a NAND channel number detector for 3D-integrated SSD. The control techniques of a program -voltage generator and an I/O frequency are proposed to enhance the SSD performance. This paper presents the solutions for the problems such as the rising time degradation and the increas ed power consumption caused by multi-channel parallel operati on. The proposed NAND channel number detector automatically detects the number of accessed channels, that is,