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Data Device Corporation
DS-BU-67301B-G
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6.5 PCI Interface
In addition to the flexible parallel CPU interface, the
Total-AceXtreme®
also includes
a PCI 2.3 compliant Target/Initiator interface. Table 12 lists the features and
characteristics of the
Total-AceXtreme’s
PCI interface.
Table 12. Total-AceXtreme® PCI Interface Characteristics
PCI Characteristic/Feature
Total-AceXtreme®
PCI Specification Compliance
Revision 2.3
Maximum PCI clock frequency
66 MHz
Support 32-bit PCI Bus
YES
Support 64-bit PCI Bus (AD[63::32])
NO
3.3V Signaling
YES
5V Tolerant
NO
PCI Target Interface
YES
PCI Initiator Interface
YES
Single-Channel PCI Initiator/DMA Engine
Memory only, not registers
PCI Initiator/DMA Engine: Transfer Directions
Supports transfers in both directions: host-to-Total-
AceXtreme and Total-AceXtreme -to-host.
PCI Initiator/DMA Engine: Data Transfer Modes
•
Block transfer mode (single descriptor execution
via registers).
•
Scatter/gather mode (descriptors stored in host
memory)
PCI Initiator/DMA Engine: PCI burst lengths
Programmable (including infinite)
PCI Initiator/DMA Engine: PCI Retry timeout
Programmable (including infinite)
PCI Initiator/DMA Engine: Programmable Interrupts
•
DMA Complete
•
DMA Descriptor Done
•
DMA Abort Function via register control
Memory and Register Addressability
•
DWord or Word write accesses to memory
•
DWord write accesses to registers
•
DWord or Word read accesses from registers
•
No 8-bit accesses
Interrupts supported
INTA#
PCI Retries
Supported
Disconnect with Data
Supported
Target Abort
Total-AceXtreme will never generate a target abort
Delayed Transactions
Supports up to two simultaneous
BAR0/BAR1 Support
BAR0 = Total-AceXtreme Memory
BAR1 = Total-AceXtreme Registers
Zero wait state bursts
Supported, for both reads and writes as both Target
and Initiator