Browse Prior Art Database

LSSD Asynchronous, Edge Sensitive Design Use in a Micro Channel Streaming Slave

IP.com Disclosure Number: IPCOM000108354D
Original Publication Date: 1992-May-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 30K

Publishing Venue

IBM

Related People

Arimilli, RK: AUTHOR [+3]

Abstract

The Micro Channel* Streaming Data Protocol contains specifications which expect edge-sensitive logic to be available. The Address logic of a Streaming Slave is an example of this. The bus cycle is assumed to be a Streaming bus operation, but, if a Basic protocol is received (presence of -ADL), the incoming address is loaded over the incremented Streaming Address. This function is implemented by latching the incoming address with -ADL, latching the internally incremented address with the rising edge of -CMD, then latching over the incremented address if -ADL is present during the next bus cycle. This function is difficult to implement with non-edge-sensitive logic due to tightly specified bus timings to edges.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

LSSD Asynchronous, Edge Sensitive Design Use in a Micro Channel Streaming Slave

       The Micro Channel* Streaming Data Protocol contains
specifications which expect edge-sensitive logic to be available.
The Address logic of a Streaming Slave is an example of this.  The
bus cycle is assumed to be a Streaming bus operation, but, if a Basic
protocol is received (presence of -ADL), the incoming address is
loaded over the incremented Streaming Address.  This function is
implemented by latching the incoming address with -ADL, latching the
internally incremented address with the rising edge of -CMD, then
latching over the incremented address if -ADL is present during the
next bus cycle.  This function is difficult to implement with
non-edge-sensitive logic due to tightly specified bus timings to
edges.

      Advantages are:
      -  allows the Micro Channel Streaming Data protocol to be
implemented free of critical timings,
      -  minimizes complexity of logic required to implement
function, and
      -  increased slave data transfer rate by up to four times by
implementation of the Streaming Data protocol
*  Trademark of IBM Corp.