| 术语 | bit-slice microprocessor |
| 释义 | bit-slice microprocessor 位片式微处理器;［数元切片式微处理机］ A special class of semiconductor devices for computers. Most bit slices are designed for microinstruction rates between 5 and 10 MHz for high-performance applications. All contain data path circuits, such as arithmetic logic units, accumulators, and shifters, that are expandable to any word length. Each bit slice also has a microprogram control or sequencer circuit that can address the microinstruction stored in read-only memory (ROM) or programmable readonly memory (PROM), test flag bits, and execute conditional branches while allowing the nesting of subroutines. Although most bit slices use Schottky transistor-transistor logical (TTL) technology, some use complementary metaloxide semi- conductor (CMOS), emitter-coupled logic (ECL), large-scale integration (LSI), and IIL technology. Packaging and architecture may also vary. In essence, the bit-slice approach allows users to design their own microprocessor and develop a variety of specialized instruction sets. 专门用于计算机的一类半导体器件。对于高性能的应用,许多位片的微指令速率在 5—10MHz之间。全部都包含有数据通路,如算术逻辑部件,累加器和移位器,都可扩充到任意 字长。每个位片还有微程序控制和定序器电路,它可访问存放在只读存储器(ROM)或可编程 只读存储器(PROM)中的微指令,测试特征位和执行条件分支转移,同时允许子程序的嵌套。虽 然绝大多数位片使用肖特基晶体管-晶体管逻辑(TTL)技术,但也有一些使用互补金属氧化物 半导体(CMOS),射极耦合逻辑(ECL)大规模集成电路(LSI)和集成注入逻辑技术。封装和结构 可有不同形式。实际上,位片法允许用户设计自己的微处理机和开发专用的指令系统。 |
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