PI7C8152A & PI7C8152B
2-PORT PCI-to-PCI BRIDGE
DATA BRIEF
PERICOM SEMICONDUCTOR CORPORATION
2380 Bering Drive • San Jose, CA 95131 • (800) 435-0800 • Fax (408) 435-1100 • http://www.pericom.com
09/24/2003, REVISION 1.0
Page 1
PI7C8152A & PI7C8152B
2-Port PCI-to-PCI Bridge, 32-bit/66MHz or 33MHz
PRODUCT FEATURES
• 32-bit / 66MHz or 33MHz Primary and
Secondary Ports
o The Primary and Secondary Ports
must both be running at the same
frequency in synchronous mode
• Asynchronous mode support (8152B only)
o Primary and Secondary Ports may
run at different frequencies
• Compliant with the following specifications:
o PCI Local Bus Specification,
Revision 2.2
o PCI-to-PCI Bridge Architecture
Specification, Revision 1.1
o Advanced Configuration Power
Interface (ACPI) Specification
o PCI Power Management
Specification, Revision 1.1
• Concurrent primary and secondary port
operation
• Provides internal arbitration for one set of 4
secondary bus masters
o Programmable 2-level priority
arbiter
o Disable control to allow use of an
external arbiter
• Supports posted write buffers in both
directions (downstream and upstream)
• Two 128-byte FIFO’s for delay transactions
• Two 128-byte FIFO’s for posted memory
transactions
• Enhanced address decoding
o 32-bit I/O address range
o 32-bit memory-mapped I/O address
range
o 64-bit prefetchable address range
o VGA addressing and VGA palette
snooping
o ISA-aware mode for legacy support
in the first 64KB of I/O address
range
• 3.3V core; 3.3V and 5V PCI I/O interface
• Extended commercial temperature range
o 0°C to 85°C
• 160-pin MQFP package
• Intel 21152 compatible
PRODUCT DESCRIPTION
The PI7C8152 is a 2-port PCI-to-PCI Bridge
designed to be fully compliant with the PCI
Local Bus Specification, Revision 2.2. Both the
primary and secondary ports are specified to run
at 32-bit / 66MHz or 33MHz (both ports must be
running at the same frequency in synchronous
mode).
The PI7C8152A supports synchronous bus
transactions between devices on the primary bus
and the secondary bus. The two buses can
operate in concurrent mode, resulting in added
increase in system performance. Concurrent bus
operation off-loads and isolates traffic on a
single bus by allowing a master and target on the
same bus to communicate with each other while
the other bus is busy.
The PI7C8152B has the added capability of
supporting asynchronous bus transactions.
Supported modes of Asynchronous Operation
Primary Secondary
25MHz to 66MHz 25MHz to 66MHz
The PCI Local Bus Specification denotes loading
restrictions on the PCI bus. The PI7C8152
allows designers to expand the loading capability
by adding a second PCI bus. On motherboards,
more PCI slots or devices can then be added on
this second PCI bus. On add-in cards, more than
one device can now reside on the add-in card
(PCI Local Bus Specifications specify that each
add-in card may only have one device because
there may only be one connection per PCI signal
in the add-in card connector).
ORDERING INFORMATION
PART NUMBER SPEED PACKAGE
PI7C8152AMA
66 MHz
or
33 MHz
160-MQFP
PI7C8152BMA
66 MHz
or
33 MHz
160-MQFP
