CyClone COMPACTPCI-824 user manual Physical Attributes, PMC Module Signal Definitions

APPENDIX A

PMC MODULE INTERFACE

A.1 INTRODUCTION

The PMC Module Interface allows PCI devices to be connected to the Local PCI interface of the CPCI- 824 host. The IEEE STD P1386.1, PCI Mezzanine Card (PMC), provides for one set of clocking and arbitration signals per PMC Module. Cyclone Microsystems has expanded this to two sets per PMC Module on the CPCI-824. With ability to connect a PMC module on the CPCI-824, up to two devices are supported. Otherwise, with a few exceptions, the standard signals defined for 64-bit CPCI connectors are used for the PMC Modules. The exceptions are noted in Section A.3. The timing for devices on PMC Modules is the same as the timing for any other PCI device; see the PCI Local Bus Specification revision 2.2 for details. The CPCI-824 PMC module location is defined as +3.3V signalling. Note that only +3.3V or universal signalling PMC modules may be used on the CPCI-824.

A number of PMC Modules are available from Cyclone Microsystems. This section is intended for users interested in developing their own modules.

A.2 PHYSICAL ATTRIBUTES

Please refer to IEEE P1386/Draft 2.0 for the physical dimensions of PMC modules.

A.3 PMC MODULE SIGNAL DEFINITIONS

PMC Modules use the signals defined in the IEEE STD P1386.1. The following four signals are added to this definition to handle the expansion from one to two devices per PMC module:

•GNT1#

•REQ1#

•CLK1

•IDSEL1

Please note that the added signals used the PMC-RSVD signals as defined in IEEE STD P1386.1. The PCI-RSVD remain untouched.

Also, note that GNT1# follows the description for GNT#, REQ1# follows the description for REQ#, CLK1 follows the description for CLK, and IDSEL1 follows the description for IDSEL. When the appropriate signals are connected to PCI devices on a PMC Module, each device has the full complement of PCI signals defined in the specification.

IDSEL signals are not provided. The designer of a PMC Module should connect the proper AD signal to a device’s IDSEL pin. AD21:16 may be used depending on the desired number mapping scheme. The suggested signal connections are shown in tables A-1 and A-2.

CPCI-824 User’s Manual	A-1
Revision 1.0, January 2006