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Reliable In-Circuit-Emulator Probe Attachment to Microprocessor 100 Pin Flat Pack

IP.com Disclosure Number: IPCOM000105239D
Original Publication Date: 1993-Jul-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Hartman, SP: AUTHOR [+3]

Abstract

Disclosed is a method which provides a more reliable probe attachment for In-Circuit Emulator (ICE) usage. The new adapter converts a surface-mount flat pack form to a pin-grid-array form. It also simplifies the attachment between the emulator and a card in a computer system, such as an input/output processor (IOP) without removing the IOP from the system.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 67% of the total text.

Reliable In-Circuit-Emulator Probe Attachment to Microprocessor 100 Pin Flat Pack

      Disclosed is a method which provides a more reliable probe
attachment for In-Circuit Emulator (ICE) usage.  The new adapter
converts a surface-mount flat pack form to a pin-grid-array form.  It
also simplifies the attachment between the emulator and a card in a
computer system, such as an input/output processor (IOP) without
removing the IOP from the system.

      The new adapter is shown in Fig. 1.  The adapter has two
interfaces, one to the ICE and the other end to the IOP.  Flex cables
are employed in this application to anticipate the weight of the
emulator.

      The adapter's ICE interface has a small circuit board.  On the
board, a 14-by-14 Pin-Grid-Array (PGA) socket and four headers are
soldered on.  The PGA socket is to accept the emulator's processor.
Signals needed from the processor are wired to four male headers
surrounding the PGA socket.  The male header has two rows of ten pins
as shown in Fig. 2.  The headers are keyed for easy plug in.

      Four flex cables are used to connect the adapter to the IOP
card in test.  The cables have low capacitance to minimize signal
loss and they also have a flex life around 2 millions flexes.  These
cables attach to matching keyed female headers.  See Fig. 2.  for
reference on female headers.  The purposes for these flex cables are
to plug the adapter to the IOP card easier and to take some weight of
the...