
Applied Micro Circuits Corporation
6195 Lusk Blvd., San Diego, CA 92121 (619) 450-9333
12-2
S5933
PCI CONTROLLER
DEVICE SPECIFICATION
12. PASS-THRU OVERVIEW .............................................................................................. 12-3
12.1 FUNCTIONAL DESCRIPTION ........................................................................................................... 12-3
12.1.1 Pass-Thru Transfers ................................................................................................................ 12-3
12.1.2 Pass-Thru Status/Control Signals ........................................................................................... 12-4
12.1.3 Pass-Thru Add-On Data Bus Sizing ........................................................................................ 12-4
12.2 BUS INTERFACE ............................................................................................................................... 12-4
12.2.1 PCI Bus Interface .................................................................................................................... 12-4
12.2.1.1 PCI Pass-Thru Single Cycle Accesses .................................................................... 12-4
12.2.1.2 PCI Pass-Thru Burst Accesses ............................................................................... 12-5
12.2.1.3 PCI Retry Conditions ............................................................................................... 12-5
12.2.1.4 PCI Write Retries ..................................................................................................... 12-5
12.2.1.5 PCI Read Retries .................................................................................................... 12-6
12.2.2 Add-On Bus Interface .............................................................................................................. 12-6
12.2.2.1 Single Cycle Pass-Thru Writes ................................................................................ 12-6
12.2.2.2 Single Cycle Pass-Thru Reads ............................................................................... 12-8
12.2.2.3 Pass-Thru Burst Writes ........................................................................................... 12-9
12.2.2.4 Pass-Thru Burst Reads ......................................................................................... 12-13
12.2.2.5 Add-On Pass-Thru Disconnect Operation ............................................................ 12-17
12.2.2.6 8-Bit and 16-Bit Pass-Thru Add-On Bus Interface ................................................. 12-18
12.3 CONFIGURATION ............................................................................................................................ 12-21
12.3.1 S5933 Base Address Register Definition ............................................................................... 12-21
12.3.2 Creating a Pass-Thru Region ................................................................................................ 12-21
12.3.3 Accessing a Pass-Thru Region ............................................................................................. 12-22
CONTENTS