TMS9995NL

The TMS9995NL microcomputer is a single-chip 16-bit cental processing unit(CPU) with 256 bytes of on-chip random access memory(RAM).A member of the TMS9990 family of microprocessor and peripheral circuits,the TMS9995NL is fabricated using N-channel silicon-gate MOS technology.The rich instruction set of the TMS9995NL is based upon a unique memory-to-memory architecture that features multiple register files resident in memory.Memory-resident register files allow faster response to interrupts and increased programming flexibility.The inclusion of RAM,timer function,clock generator,interrupt interface and a flexible flag register on-chip facilitates support of small system implementations.

The key features of the TMS9995NL are:(1)16-bit instruction word;(2)memory-to-memory architecture;(3)65,536 byte/32,768 word directly addressable memory address space;(4)minicomputer instruction set including signed multiply and divide instructions;(5)multiple 16-word register files residing in memory;(6)256 bytes of on-chip RAM;(7)separate memory and interrupt bus structures;(8)8-bit memory data bus;(9)7 prioritized hardware interrupts;(10)16 software interrupts;(11)programmed and DMA I/O capability;(12)serial I/O via communication register unit;(13)on-chip time/event counter;(14)on-chip programmable flags(16);(15)macro instruction detection(MID) feature;(16)automatic first wait state generation feature;(17)single 5-volt supply;(18)40-pin package;(19)N-channel silico gate MOS technology;(20)on-chip clock generator.

The absolute maximum ratings of the TMS9995NL can be summarized as:(1)supply voltage:-0.3 to 7 V:(2)all input voltage:-0.3 to 20 V;(3)output voltage:-0.3 to 7 V;(4)continuous power dissipation:1 W;(5)operating free-air temperature range:0 to 70.If you want to know more information such as the electrical AC characteristics about the TMS9995NL,please download the datasheet in www.seekic.com .