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VRC4373

Features: CPU Interface• Direct connection to the 66MHz VR4300 CPU bus• 3.3V I/O• Support for all VR4300 bus cycles• Little-endian or big-endian byte order Memory Interface• Support for boot ROM, base memory, and up to four SIMMTM (DIMM) ranges• Programmable ad...

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SeekIC No. : 004542960 Detail

VRC4373: Features: CPU Interface• Direct connection to the 66MHz VR4300 CPU bus• 3.3V I/O• Support for all VR4300 bus cycles• Little-endian or big-endian byte order Memory Interface&...

VRC4373 Data Sheet

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Part Number:
VRC4373
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/21

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Product Details

Description



Features:

CPU Interface
• Direct connection to the 66MHz VR4300 CPU bus
• 3.3V I/O
• Support for all VR4300 bus cycles
• Little-endian or big-endian byte order
Memory Interface
• Support for boot ROM, base memory, and up to four SIMMTM (DIMM) ranges
• Programmable address ranges for base memory and SIMM memory
• 66 MHz memory bus
• Base memory range: SDRAM and EDO DRAM
• SIMM memory range: SDRAM, EDO and fast-page DRAM, and flash ROM
• Several speed grades supported within each memory range
• Bank-interleaved or non-bank-interleaved SIMM memory ranges
• On-chip bank-interleaving buffers
• Open DRAM page maintained within base memory
• 8-word (32-byte) write FIFO (CPU-to-memory)
• 2-word (8-byte) prefetch FIFO (memory-to-CPU or memory-to-PCI)
• On-chip DRAM and SDRAM refresh generation
• Up to 16 MB of write-protectable boot ROM
• Boot ROM address and data signals multiplexed on DRAM data signals
• 3.3V inputs; 5V-tolerant outputs
PCI Interface
• Master and target capability
• Host bridge and add-on board modes
• PCI bus arbiter
• 4-word (16-byte) bidirectional PCI master FIFO (CPU = PCI bus master)
• 8-word (32-byte) bidirectional PCI target FIFO (memory is PCI bus target)
• 33 MHz PCI bus clock rate
• 133 MB/sec burst transfers
• Interrupt support for add-on board mode
• 3.3V PCI-compliant inputs; 5V-tolerant outputs
DMA Controller
• CPU-initiated block transfers between memory and PCI bus
• 8-word (32-byte) bidirectional DMA FIFO
• Two sets of DMA control registers for chained transfers (one set is programmed while data is transferred on the other)
• Bidirectional unaligned transfers
• Transfers at maximum PCI bandwidth of 133 Mb/s


Specifications

Storage temperature                                                                     -55 to 125
Operating ambient temperature                                                            0to 70
DC supply voltage with respect to GND                                             -0.5V to 4.6V
DC voltage on input pins with respect to GND                                   -0.5 V to 5.5V
Voltage discharged between any two pins through a 1Kohm from 100 pF     2000V
Maximum power dissipation                                                                            1 W


Description

The VRC4373TM system controller is a software-configurable chip that directly interfaces the VR4300TM CPU and PCI bus without external logic or buffering, and also interfaces memory (SDRAM, EDO, fast-page DRAM, and flash boot ROM) with minimal buffering. From the viewpoint of the VR4300 CPU, the VRC4373 acts as a memory controller, DMA controller, and PCI bridge. From the viewpoint of PCI agents, the VRC4373 acts as either a PCI bus master or a PCI bus target. Alternatively, the VRC4373 may be located on a PCI bus add-on board.




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