LSI SYM8953U manual PCI Interface

A.2.1 The PCI Interface

The PCI interface operates as a 32-bit DMA bus master. The connection is made through edge connector J1, which provides connections on both the front and back of the board. The signal definitions and pin numbers conform to the PCI Local Bus Specification Revision 2.2 standard.

Table A.2 and Table A.3 show the signal assignments.

Note: The + 3.3 V pins are tied together and decoupled with high frequency bypass capacitors to ground. No current from these 3.3 V pins is used on the board. The board derives power from the + 5 V pins, directly and through a 3.3 V voltage regulator. The PCI VI/O pins are used to differentiate between a 5 V or a 3.3 V PCI environment.

A-4 Technical Specifications