By Topic

Self-timed interface of the input/output subsystem of the IBM eServer z900

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
Hoke, J.M. ; IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601, USA ; Bond, P.W. ; Livolsi, R.R. ; Lo, T.C.
more authors

The self-timed interface (STI), used in several generations of IBM's most powerful servers, has evolved to provide a greater I/O subsystem bandwidth than ever before. The STI of the IBM eServer z900 is capable of transferring data between the processor complex and the I/O subsystem at a rate of up to 1 GB/s compared with the 333MB/s rate of the IBM S/390® G3/G4- and G5/G6-class large servers—an improvement of up to a factor of 3. Additionally, in the eServer z900, STI links suitable for transferring data at a rate of 1 GB/s are used for the third iteration of the integrated cluster bus (ICB-3), thus providing direct links to other eServer z900s. Also, the role of the STI has increased in the eServer z900, becoming the interface used on the I/O subsystem backplane. The majority of the STI logic (both physical and logical layers) has remained essentially unchanged, with advances resulting from the use of improved cables and connectors, and from the introduction of a multilevel, pre-distortion differential off-chip “super-driver.”

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:46 ,  Issue: 4.5 )