32-bit, 66MHz

Local Bus

MPC860

SDRAM

Flash

PCI 9656

EEPROM

J 2

J 1

64-bit, 66MHz PCI Bus

1

2

IDMA

DMA 0

DMA 1

COM 1

COM 2

COM N

2

PCI 9656 Applications

Motorola PowerQUICC Designs

The PCI 9656 is ideal for MPC 850/860-based

PowerQUICC designs. Targeted datacom and

telecom applications include high-speed

routers/switches, Frame Relay adapters,

WAN/LAN controllers, and modem cards.

The PCI 9656 simplifies these designs by

providing an enhanced direct-connect inter-

face to the PowerQUICC processor family.

The flexible 3.3V, 5V tolerant I/O buffers,

combined with local bus operation up to

66MHz, are ideally suited for current and

future PowerQUICC processors.

The PCI 9656 supports the PowerQUICC

IDMA channels for data transfer between

the integrated PowerQUICC communication

channels and PCI.

In addition, the PCI 9656 exploits PLX’s

leading edge Data Pipe Architecture technol-

ogy, allowing unlimited bursts, as illustrated

in the figure below.

For PowerQUICC IDMA operation,

the PCI 9656 transfers data to the PCI

bus under the control of the IDMA

handshake protocol using Direct

Master transfers.

Simultaneously, the two PCI 9656

DMA channels run as masters on both

buses to perform bi-directional data

transfers between the local bus and

the PCI bus.

This is a prime example of how the PCI 9656

gives PowerQUICC designers greater flexibil-

ity in implementing multiple simultaneous

I/O transfers.

Generic 32-bit, 66MHz Local Bus Designs

The PCI 9656 also supports two generic

de facto standard bus interfaces, one with

demultiplexed and the other with multi-

plexed address and data busses. Because of

their high speed and relative simplicity, these

C and J bus modes have been embraced by

designers of a wide variety of devices

including processors, DSPs, memories,

custom ASICs, and FPGAs.

CompactPCI Adapters

The PCI 9656 is the ideal choice for

CompactPCI adapters in industrial, telecom,

and networking applications. These applica-

tions include WAN/LAN controllers,

modem cards, Frame Relay adapters, and

telephony cards for telecom switches and

remote-access systems.

The PCI 9656 has integrated key features

to enable live insertion and extraction of

CompactPCI Hot Swap adapters. The PCI

9656 is PICMG 2.1 r2.0 Hot Swap Silicon,

supporting Programming Interface 0 (PI=0).

It includes Bias Voltage and Early Power

support for ease of Hot Swap board design.

Further, the PCI 9656 includes an option to

suppress PCI target retries during chip ini-

tialization, providing the optimal behavior

for live insertion in Hot Swap systems.

The PCI 9656, with its internal PCI arbiter,

reset signal direction control, and Type 0/1

PCI configuration support, is

ideal for CompactPCI system cards.

PCI Adapters

The PCI 9656 is also designed for traditional

PCI adapter card applications requiring 64-bit,

66MHz PCI operation and bandwidth.

Specific applications are high performance

communications, networking, disk control,

RAID, and data encryption adapters.

Today, Power Management and Green

PCs are major initiatives in traditional PCI

applications. The PCI 9656 supports PCI

power management, including generation

requirement for modem and communica-

tions adapters in Windows desktop and

server systems..

Embedded Host Designs

I/O intensive embedded host designs are

another major application of the PCI 9656.

These applications include network

switches/routers, printer engines, set-top

boxes, CompactPCI system cards, and

industrial equipment.

While the support requirements of these

embedded host designs share many similari-

ties with peripheral card designs, there are

three significant differences:

s

A host must configure the PCI bus. The

PCI 9656 supports PCI Type 0 and Type

1 configuration cycles.

s

A host must provide a PCI bus arbiter.

The PCI 9656 arbiter supports seven exter-

nal PCI masters, enough for a CompactPCI

backplane with 7 peripheral slots.

s

For hosts, the directions of reset and inter-

rupt signals reverse. The PCI 9656 includes

a strapping option to accomplish this. In

one setting, the directions are appropriate

for a peripheral. In the other, they are

appropriate for a host.

PCI 9656 PowerQUICC

CompactPCI Adapter

2

1