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SERIES PMC408 PCI MEZZANINE CARD 32-CHANNEL DIGITAL I/O MODULE
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termination allows the PCI bus to be free for other system
operations while the data is moved to the read register.

A PCI bus write to the PMC module will result in 1)

immmediately accepting the write data and normal cycle termination
or 2) issue of a retry termination. A retry termination will be issued if
the previous write cycle has not completed on the PMC module. It
will typically take the PMC module 1000ns to write the data to the
required internal register. Thus if another write cycle is initiated on
the PCI bus before the typical 1000ns has lapsed, the write cycle will
be terminated with a retry.

A programmable logic device provides the control signals

required to operate the board. It decodes the selected addresses,
control signals, and interrupt handling. It also returns the
acknowledgement signal required by the carrier/CPU board per the
PMC specification. The program for the gate array is stored in
separate PROM memory and loaded upon power-up.

PMC Module Software

Acromag also provides a software product (sold separately)

consisting of PMC module ActiveX (Object Linking and Embedding)
controls for Windows 98, 95

, ME, 2000 and Windows NT

compatible application programs (Model PMCSW- ATX, MSDOS
format). This software provides individual controls that allow
Acromag PMC modules to be easily integrated into Windows

application programs, such as Visual C++

™

, Visual Basic

Microsoft

Office

97 applications and others. The ActiveX

controls provide a high-level interface to PMC modules, eliminating
the need to perform low-level reads/writes of registers, and the
writing of interrupt handlers—all the complicated details of
programming are handled by the ActiveX controls. These functions
consist of ActiveX control for each Acromag PMC module.

In addition, Acromag provides a software product (sold

separately) consisting of PMC module VxWorks

libraries. This

software (Model PMCSW-API-VXW, MSDOS format) is composed
of VxWorks

(real time operating system) libraries for all Acromag

PMC modules. The software is implemented as a library of “C”
functions which link with existing user code to make possible simple
control of all Acromag PMC modules.

5.0 SERVICE AND REPAIR

SERVICE AND REPAIR ASSISTANCE

Surface-Mounted Technology (SMT) boards are generally

difficult to repair. It is highly recommended that a non-functioning
board be returned to Acromag for repair. The board can be easily
damaged unless special SMT repair and service tools are used.
Further, Acromag has automated test equipment that thoroughly
checks the performance of each board. When a board is first
produced and when any repair is made, it is tested, placed in a burn-
in room at elevated temperature, and retested before shipment.
Please refer to Acromag's Service Policy Bulletin or contact
Acromag for complete details on how to obtain parts and repair.

PRELIMINARY SERVICE PROCEDURE

Before beginning repair, be sure that all of the procedures in

Section 2, Preparation For Use, have been followed. Also, refer to
the documentation of your carrier board to verify that it is correctly

configured. Replacement of the module with one that is known to
work correctly is a good technique to isolate a faulty module.

CAUTION:

POWER MUST BE TURNED OFF BEFORE

REMOVING OR INSERTING BOARDS

Acromag’s Applications Engineers can provide further technical

assistance if required. When needed, complete repair services are
also available from Acromag.

6.0 SPECIFICATIONS

PHYSICAL

Physical Configuration…….... Single PMC Module.

Height.............................… 15.11 mm (0.595 in).

(See Drawing 4501-859)

Stacking Height………….. 10.0 mm (0.394 in).
Length.............................…149.0 mm (5.866 in).
Width............................….. 74.0 mm (2.913 in).
Board Thickness...........…..1.59 mm (0.062 in).

Connectors:

PCI Local Bus Interface..... Two 64-pin female receptacle header

(AMP 120527-1 or equivalent).

Field I/O…….................…. 50-pin, SCSI-2, female receptacle

header (AMP 787082-5 or
equivalent).

Power Requirements

PMC408(E)

Typical

(

5%) Max.

+12V Typical

(