Impulse #05 28 июля 1999

Железо

ZILOG - Three generations of the architecture of the Z80 ZILOG.

            ZiLOG - that "delicious" it for us?



                                          (C) Heaven Aeroplane


                                          2:450 / 156.24 @ 
FidoNet 

                                           phd.rulez @ iname.com

                                           http://pro.hd.da.ru

 THREE GENERATIONS OF ARCHITECTURE OF ZiLOG Z80

   (Translated by the official press releases

       with some abbreviations)


     * Approx. TRANSFER.: Again, very much
Advertising and reps, so sorry; some details, interesting and 
understandable only to specialists, are omitted. For those 
wishing to read everything in full and in English - URL: 
www.zilog.com. 


     Z80 microprocessor is still used in many modern devices;
many of them would seem like science fiction 25 years ago - 
when Zilog first introduced the world to this chip. Over the 
years, architecture has been improved Z80 - increased speed and 
size addressable RAM; alternative sets

registers used in this family of processors, allow you to 
quickly get access to the necessary data and work effectively 
with interruptions, which makes chips Z80 family ideal for 
embedded controllers.



                Three core


     Three technologies - Z80, Z180 and Z380
are compatible to the system commands;
differences are higher
productivity and volume of addressable
RAM.


     * Approx. TRANSFER.: The table on site
was specified address space
Z380 equal to 16MB, then the entire documentation specified 
number 4GB, apparently here we have a glitch, because 16MB

for 32-bit processor - not too much.


     The original Z80 carried the team for
4 stroke, addressed the 64K and clocked at 10MHz. Z180 and his 
brother spend S180 3 clocks to execute instructions which gives 
the performance boost of 33% compared with the Z80 at the same 
frequency. Operating frequency is 33MHz S180, the processor 
addresses 1 MB of RAM. 


     Z380 is a 32-bit processor.
It is fully compatible (upward) with
The previous model of Z80. As
previously mentioned, the chip performs
team for 2 cycles, the amount of addressable memory
for it is 4GB. The presence of four
32-bit sets of registers (8x16-bit)
makes it suitable for use in multitasking systems, as well as 
all family as a whole, embedded controllers.



     * Approx. TRANSFER.: And now - a little
scientific jungle to give some
idea of ​​the product range;)))



     Scope of the family


  Communications Async Z180, Z18X

                    Sync, T1, E1 Z85230, C30

                                           Z16C30, C32

                    Modem, ISDN Z182, Z189, Z382

                    Modem, ISDN, GSM Z382


  For general-purpose Z84C15, Z18X

                    Printers, faxes, Z180, Z181, Z185

                    Reading credit Z02201, Z182

                    Card / Modem Z02922, Z84C15


  Remote Fax Z180, Z01701

  access modem (V.34) Z189, Z03400

                                           Z89C50

                    ISDN Z182, Z382

                    HDSL, ADSL, SDSL Z182, Z382


  Goods-nation General naznnacheniya NMOS, Z84CXX

  Nogo consumption and the military-industrial-X180, SCC

  and others of nny complex



     * Approx. TRANSFER.: All-everything, do not beat,
not anymore ... ;)))


             Family Z180


     Zilog uses in its products
proprietary technology Superintegration,
allowing "pasted" processor required peripherals. All 
processors contain a kernel Z180 S180, which includes memory 
management unit, direct memory access controller and ports, for 
example, Z80182 (Has the ability to control bus ISA)

or the Z189, which consists of parallel I / O ports. In Z185 
are both parallel and serial ports, as well as ROM 32KB. Z195 - 
The same Z185, but no ROM. 

     Feed processors from 5V, work
at a frequency of 33 MHz (only Z181 - at 10, and
S180 - 6 to 33 MHz). Operating
Temperature - 0 to +70 C.


         Third generation: Z382


     Z382 - it 16/32-bitnoe product
designed for high-performance embedded communications devices; 
it combines processor Z380 and 10-megabit full-duplex I / O 
channels. Provided job with ISA, Plug-And-Play and PCMCIA. Ideal

for ISDN and xDSL.


     ZiLOG, as well as some third
the company provides a complete description
their products, as well as a set of hardware and software for 
rapid development of devices based on processor family Z80.



     Superintegration, Z380, Z180, Z8, and
Z80 are trademarks of Zilog, Inc.
and protected by law.


         Architecture Overview Z380


     Z380 provides a large memory addressability and efficient 
processing data while maintaining compatibility with the Z80 and

Z180-level code. Here are some of the characteristics of this 
processor: 

- Support for the regime of low energopot
  Use by;

- 64Kb/4Gb address space;

- 16-bit internal data bus;

- The minimum time of execution team -

  2 cycles;

- 4 sets of registers;

- Added registers BCz, DEz, HLz, IXz,

  IYz, SPz, Iz, PCz for

  32-bit addressing;

- Added alternative registers IX 'and

  IY ', as well as IXz' and IYz ';

- Improved facilities for handling interrupt
  tions, including 16-bit interrupt vector
  vany.


     Compared with previous models,
Z380 has a large number of additional features, such as working 
with 16 - and 24-bit index offsets

advanced indirect addressing and as a means to access the full 
32-bit address space. Z380 has a team for 16-bit arithmetic and 
logical operations, multiplication and division, 16-bit command

I / O, 32-bit operations to compute the addresses, commands, 
download and share data between 32-bit registers. 


     As already noted, the Z380 has 4
set of 32-bit registers (including the index) are provided as a 
means to switch between sets. 


     User program provided not only the 32-bit address
RAM space, but 32 bits for addressing I / O ports, it is 
possible to write to the ports as a single values, and data 
blocks. In addition, the processor has a 256-byte internal 
buffer, which will be used for access to additional blocks, 
built around a core technology Z380 Superintegration.



     Technology embedded in the Z380, will in the future to 
increase the number of banks register to 128.


 ... extension is not expected due

     the loss of the screw translator ;-) ...