Specifications

Computer Architecture and Maintenance (G-Scheme-2014)
 Parity on both data and address lines: This allows implementation of robust
system.
 Support for both SV and 3.3 V operated logic.
 Forward and backward compatibility between 66 MHz and 33MHz PCI.
Q.List the specification and Version of PCI
Ans. Versions of PCI allow (and in the latest versions require) 3.3V slots (keyed
differently) on motherboards and allow for cards that are either double keyed for both
voltages or even 3.3V only.
• PC 2.2 allows for 66 MH signaling (requires 3.3 volt signaling) (peak transfer rate
of 533 MB/s).
• PCI 2.3 permits use of 3.3 volt and universal keying, but does not allow S volt
keyed add in cards.
• PCI 3.0 is the final official standard of the bus, completely removing 5-volt
capability.
• PCI-X doubles the width to 64-bit, revises the protocol, and increases the
maximum signaling frequency to 133 MHz (peak transfer rate of 1014 MB/s)
• PCI-X 2.0 permits a 266 MHz rate (peak transfer rate of 2035 MB/s) and also
533MHz rate, expands the configuration space to 4096 bytes, adds a 16-bit bus
variant and allows for 4.5 volt signaling
• Mini PCI is a new form factor of PCI 2.2 for use mainly inside lap top s
• CardBus is a PC card form factor for 32-bit, 33 MHz PCI
• CompactPCl, uses Eurocard-sized modules plugged into a PCI backplane.
• PC/104-Plus is an industrial bus that uses the PCI signal lines with different
connectors.
Specifications of PCI
These specifications represent the most common version of PCI used in normal PCs.
 33.33 MHz clock with synchronous transfers.
 Peak transfer rate of 133 MHz per second for 32-bit bus width (33.33 Mhz x32 bits
divide(/) 8 bits/byte =133 MB/s)
 Peak transfer rate of 266 MB/s for 64-bit bus width
Prepared By – Prof. Manoj.kavedia (9860174297 – 9324258878 ) (www.kavediasir.yolasite.com)
55