Browse Prior Art Database

Method for Verifying One-Way Registers in a VLSI Chip

IP.com Disclosure Number: IPCOM000103260D
Original Publication Date: 1990-Sep-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

Massoudian, K: AUTHOR [+2]

Abstract

Disclosed is a method that verifies the one-way registers of a Very Large Scale Integrated (VLSI) circuit chip from the host side.

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

Method for Verifying One-Way Registers in a VLSI Chip

      Disclosed is a method that verifies the one-way registers of a
Very Large Scale Integrated (VLSI) circuit chip from the host side.

      This method is implemented on a system that consists of Host
Test Code (HTC), Adapter Test Code (ATC), host CPU and memory,
Adapter Processor (AP) and memory, and a VLSI chip located on the
adapter.  The VLSI chip has three sets of registers: (1) One-Way to
Adapter Registers (OWTAR) that are only writable from host and
readable from adapter, (2) One-Way to Host Registers (OWTHR) that are
only writable from adapter and readable from host, (3) Two-Way
Special Registers (TWSR) that are both writable and readable from
host and adapter.

      Through TWSR the HTC loads the ATC onto AP's memory then
activates it.  The HTC writes a set of data patterns to the OWTAR,
then signals the ATC to verify.  The ATC verifies the data patterns,
if the test passes then the ATC writes a set of data patterns to the
OWTHR and signals the HTC to verify.  The HTC verifies the data
pattern and clears the registers and reports test results.  If the
OWTAR fails the test, the ATC sends the test results back to the HTC
through the TWSR, and the HTC clears the registers and reports the
test results.

      Disclosed anonymously.