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MM-6790F
A 64MB
VME/VME64 Compatible High-Speed CMOS NVRAM |
| Features |
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Capacity
CMOS NVRAM: 16, 32, 64MB
Flash Memory: 32, 64, 128, 256MB |
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On-board
timer provides 1 usec to 16 msec in
1 usec increments for Flash timing
requirements |
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Compatible
with VME/VME64
A32/A24/D64/D32/D16/D8 (UAT) (BLT)
(MBLT) |
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Data
retention for CMOS, 3 years with
lithium batteries, 4 weeks with
rechargeable NiCad batteries |
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Cycle/Access Time CMOS NVRAM:
150/100 nsec Flash memory: 200/150
nsec (read only mode) |
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Block
Transfer of 256 bytes for VME and
2KB for VME64 |
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Two
on-board, redundant, fused lithium
or NiCad batteries |
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Module
Selection on 1MB boundaries,
switch-selectable |
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Description |
The MM-6790F is a high speed,
non-volatile memory board using various
combinations of CMOS NVRAM and Flash memory. The
board is completely compatible with VME/VME64
and has a data transfer rate of 64 MB/sec.
Boards operate with block transfer (BLT) of 256
bytes for VME and 2KB for VME64 (MBLT).
A Flash memory software driver example is
provided on a floppy diskette along with a
sample listing in "C" code.
With CMOS NVRAM the MM-6790C has two on-board,
redundant, fused batteries to backup the memory
in case of a power loss. Batteries may be either
rechargeable NiCad or non-rechargeable lithium
types. On-board LEDs and a control status
register indicate battery condition.
Reliability is ensured by burn-in and running
memory diagnostics that check operation for 48
hours while temperature-cycling boards between 0
and 65°C. |
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MM-6790F
Specifications |
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Capacity : CMOS NVRAM: 16, 32, 64MB, Flash Memory:
32, 64, 128MB |
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Cycle/Access Time : CMOS Static RAM: 150/100 nsec
(adjustable), Flash Memory: 150/100 nsec (adjustable) |
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Address : 32-bits plus a 6-bit memory address
modifier |
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Data In/Data Out : 8, 16, 32, 64 bits (UAT) and block
transfer (BLT) of 256 bytes for VME, and 2KB for VME64
(MBLT) |
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Modes of Operation : Read, write, read-modify-write |
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Module Selection : 1MB boundaries, switch selectable |
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Interface : VME/VME64 |
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On-Board Batteries : Three redundant, fused lithium
or NiCad batteries; each NiCad battery has its own charger.
Each battery type has a voltage monitor and LEDs to indicate
battery status. |
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Battery Types : NiCad (rechargeable) Rating: 100 mA/hr
each, 3.6V
Data retention: 4 weeks, Lithium (non-rechargeable) Rating:
1500 mA/hr each, 3.6V, Data retention: 3 years |
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Operating Temperature : 0 to +70°,C |
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Storage Temperature : -40 to +85°,C Relative |
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Relative Humidity : Up to 95% without condensation |
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Flash Programming Power Requirements : +12V Vpp
switchable under software control |
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Operating Power Requirements : +5V (fully pop.)
Standby 1.6A Operate 1.8A, +12V (programming) Operate 5mA |
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