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.
1
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
of PME in the D3
COLD
state. This is a
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
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.
2
COM 1
COM 2
COM N
IDMA
1
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.
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.
MPC860
2
SDRAM
Flash
J2
s
DMA 0
32-bit, 66MHz
Local Bus
2
DMA 1
J1
EEPROM
PCI 9656
64-bit, 66MHz PCI Bus
PCI 9656 PowerQUICC
CompactPCI Adapter
PLX [ PLX TECHNOLOGY ]
