元器件交易网讯 AMD在国际固态电路会议上发布了它的四核 x86-64 片上系统处理器Jaguar。其可节能0.5w,或者超过1.85GHz和25w。
这个28nm、11金属层的处理器尺寸大小为26.2mm2。“相比于先前的40nm双核处理器Bobcat,它更注重功效的设计,并提高了周期指令、频率和功率。”AMD称。
挨着四个核的是4个0.5Mbyte L2高速缓存和一个L2接口模块。
“共享2Mbyte L2高速缓存相比于双核Bobcat每个单分512kbyte高速缓存架构是一个有意义的改进,”AMD称。“L2 接口模块允许L2高速缓存之间,核之间和北桥芯片交换数据。”
相比于Bobcat,Jaguar 加载存储单位被重新设计,浮点单元本身支持128位操作系统
北桥芯片(North Bridge)是主板芯片组中起主导作用的最重要的组成部分,也称为主桥(Host Bridge)。一般来说,芯片组的名称就是以北桥芯片的名称来命名的,负责与CPU的联系并控制内存、AGP、PCI数据在北桥内部传输,提供对CPU的类型和主频、系统的前端总线频率、内存的类型(SDRAM,DDR SDRAM以及RDRAM等等)和最大容量、ISA/PCI/AGP插槽、ECC纠错等支持,整合型芯片组的北桥芯片还集成了显示核心。 (元器件交易网刘光明 编译)
外媒原文如下:
ISSCC: Quad x86 throttles from 0.5W to 1.85GHz
AMD presented Jaguar at ISSCC, its four core x86-64 processor for SoCs which can throttle down to 0.5W, or up to over 1.85GHz and 25W.
The 28nm 11 metal layer processor occupies 26.2mm2, and "is implemented with an emphasis on design efficiency, while improving instructions-per-cycle, frequency and power compared to the prior-generation 40nm dual-core Bobcat," said AMD.
Alongside the four cores are four 0.5Mbyte L2 cache modules and an L2 interface.
"The shared 2Mbyte L2 cache is a significant advantage over the dedicated per-core 512kbyte cache configuration of dual-core Bobcat," said AMD. "The L2 interface allows data to flow between the L2 cache, the core and the north bridge."
Compared Bobcat, the load-store unit is redesigned, and the floating point unit natively supports 128bit operation.