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MM-6490D
2 GB High
Speed, Dual-Port VME/VME64/RACEway Buffer
Memory |
| Features |
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Capacity:
128MB, 256MB, 512MB, 1GB and 2GB |
Transfer
Rate:
RACEway: up to 160 MB/s
VME64 bus: 80 MB/s |
Cycle/Access Time:
Write 100/30, Read 100/30
Compatible with VMEbus Rev D and
RACEway Rev 1.4 |
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Block
Transfer (BLT) 256 bytes for VME, MBLT
of 2KB for VME64, and 2KB for RACEway |
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Write-Wrong Parity for diagnostics
under software control |
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RACEtrack
Certified |
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1 Year
Warranty |
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Description |
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The MM-6490D
is a high-speed, dual-port memory module that
provides up to 2GB for VME/VME64/RACEway
systems. It is intended for high performance
applications employing Burst Mode on RACEway at
data rates greater than 160 Mbytes/sec. Block
Transfers on the VMEbus with data rates at 80
Mbytes/sec are also supported.
The Control Status Register (CSR), located in
the short I/O address space, stores and reads
bytewide parity errors detected on the
VME/RACEway buses. The other bits enable
Write-Wrong parity for diagnostics.
Parity generation and checking are provided for
each byte; parity status is stored and
transmitted via BERR.
Reliability is ensured by burn-in and running
memory diagnostics that check operation for 48
hours while temperature cycling boards from
0-60° Celsius. |
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MM-6490D
Specifications |
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Capacity : 128MB,
256MB, 512MB, 1GB and 2GB |
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Cycle/Access Time
: Block Transfer (BLT) - Write:, 100/30,
Read: 100/30 |
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Address : 32-bits
for VMEbus and RACEway |
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Data In/Data Out :
8, 16, 32, 64 bits (UAT) for VMEbus,
32-bit multiplexed for RACEway |
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Sequential Access
: Block Transfer (BLT) of 256/2KB, MBLT
2KB, and RACEway 2KB |
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Parity Checking :
Byte-wide parity generation and
checking; parity output stored and
transmitted via CSR, Write-Wrong parity
for diagnostics |
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CSR : Read/Write,
8 bits wide, jumper-selectable in VME
short I/O space (A16) with VMEbus low
limit address tracking |
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CSR Format : |
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D0 Enable Parity
D1 Write-Wrong Parity
D6 VMEbus Disable
D7 Parity Error
Others: Don't Care |
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Interface : VME
Rev. D and RACEway REV 1.4 |
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Modes of Operation
:Read, Write, read-modify-write, and
refresh |
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Memory Selection :
Two independent memory ports,
switch-selectable on 1MB boundaries for
VME, Card Select for RACEway |
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Operating Temperature
: 0 to +60°C |
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Storage Temperature
: -40 to +85°C |
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Relative Humidity
: Up to 95% without condensation |
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Power Requirements
: 5V @ 2.8 Amps |
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