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INMOS B418 Size-2 Flash ROM TRAM
- 256 Kbytes non-volatile memory (Flash ROM)
- 10,000 program/erase cycles
- ideal for booting embedded transputer systems
- in-system re-programmability
- ROM contents user-programmed through INMOS links
- size-2 TRAM
- sub-system port for resetting transputer networks
- can be used as non-volatile backup memory
The IMSB418 is a TRAM designed primarily for configuring and boot-strapping
transputer networks in embedded systems. It contains 256 Kbytes of non-volatile
memory: implemented with flash ROM devices (the flash ROM is an EPROM-like
device with bulk electrical erasability, rather than UV erase). After reset,
the IMSB418 outputs a program stored in the ROM from one of its INMOS serial
links. An on-board programming voltage generator, and programming software,
allows the ROM contents to be programmed without removing the ROM devices from
the board and without removing the IMSB418 from an assembled system. Programming
is through a simple protocol on one of the INMOS serial links. Safeguards are
provided against accidental erasure/programming. The ROM devices can be reprogrammed
at least 10,000 times. The IMSB418 can also be used as a non-volatile backup
memory in any microprocessor system: all that is required is an INMOS link
adaptor to interface the IMSB418 to the microprocessor.
| TRAM Features | Units | Notes |
|---|
| Flash ROM | 256 | Kbytes | [1] |
| TRAM size | 2 |
|
|
| Length | 3.66 | inch |
|
| Width | 2.15 | inch |
|
| Pitch between pins | 3.30 | inch |
|
| Component height above PCB | 9.0 | mm |
|
| Component height below PCB | 3.5 | mm | [2] |
| Weight | 60 | g |
|
| Storage Temperature | 0-70 | °C |
|
| Operating Temperature | 10-40 | °C |
|
| Power supply voltage
(Vcc) | 4.75-5.25 | Volt |
|
| Power consumption | TBA | W |
|
Notes: - A full 256Kbytes are available to the user: the on-board programming software
used on the IMSB418 is stored in a separate device.
- This dimension includes the thickness of the PCB.
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Ltd.
