
Applied Micro Circuits Corporation
6195 Lusk Blvd., San Diego, CA 92121 (619) 450-9333
2-3
PCI CONTROLLER
S5933
DEVICE SPECIFICATION
S5933
PCI CONTROLLER
2.0
ARCHITECTURAL OVERVIEW
INTRODUCTION TO THE PCI LOCAL BUS
The local bus concept was developed to break the
PC data bottleneck. Traditional PC bus architectures
are inadequate to meet the demands of today’s
graphics-oriented systems and large application
sizes. A local bus moves peripherals off the I/O bus
and places them closer to the system’s processor
bus, providing faster data transfer between the pro-
cessor and peripherals.
The PCI Local Bus addresses the industry’s need for
a local bus standard that is not directly dependent on
the speed and size of the processor bus, and that is
both reliable and expandable. It represents the first
time in the history of the PC industry that a common
bus, independent of microprocessor design and
manufacturer, has been adopted and used by rival
PC computer architectures. PCI offers simple “plug
and play” capability for the end user, and its perfor-
mance is more than adequate for the most demand-
ing applications, such as full-motion video.
S5933’s major features:
Processor independence
Support for autoconfiguration, using a compre-
hensive set of standard configuration functions
Multiplexed, burst mode operation
Synchronous up to 33 MHz
Full multimaster capability, allowing any PCI
master peer-to-peer access to any PCI slave
Hidden central arbitration
Address and data parity
Low pin count for cost-effective packaging
Three physical address spaces: memory, I/O,
and configuration
Capability of full concurrency with processor/
memory subsystem
Support for memory read multiple
160 PQFP and 208 TQFP package options
Figure 2-1. S5933 Block Diagram
DEVICE SPECIFICATION
FIFO
DECODER
MAILBOXES
PASS THRU DATA
BUFFER
PASS THRU ADDRESS
WRITE
ADDRESS
LATCH
WRITE
READ
MUX/
DEMUX
PROGRAM–
MABLE
DECODER
CONFIG.
REGS
CONTROL
BUFFERS & LATCHES
PCI
BUS
ADDR
DATA BUS
SELECT &
CONTROL
ADD-ON
INTERFACE
STATUS &
INTERRUPT
8/16
32
BIOS ROM INTERFACE
PCI Transfer Counters