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I need a nonvolatile reprogrammable removable replacement device

I need nonvolatile solution that is replacing a configuration set of EPROMs that will be installed on a Printed Wiring Board ---

Reqt's

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1) It must be a single device 2) It must be a removable device as it will contain configuration data,n some BOOT info, and some special processing code. Apart from this single configuration device, the main memory area consists of some FLASH & DDR. 3) It is programmable in-circuit (ie. it is read and write able) from a local bus of a processor. 4) at least 1 M-byte in size 5) Read Tacc 100ns or less 6) Vcc of 3.3V or less 7) The socket/device mechanism must withstand some vibration (such as the inside of running car)

Ideally I'd like to have a FLASH device with DIP packaging. This way I can install the flash in a traditiona; DIP socket and remove it for off-line configuration. When installed one can read/write from the device via embedded programming. So far all I've see is M-System DiskonChip 2000 which seems a bit of an overkill.

Atmel has 512K x 8 (5V) DIP devices (they say its Flash but the fine print says EEPROM ~90ns), but I will need two devices for the 1M-byte requirement.

Any suggestion would be welcome and none of them will be criticized.

Flash Cards? SmartMedia, Compact Flash?

Thanks in advance,

JoeG

Reply to
JoeG
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Nonvolatile Static Ram or Nonvolatile Timekeeping RAM, I have always been quite partial to these devices. I've used them a lot in different projects. The ten year battery life has only been a problem on old SGI and SUN workstations, that aren't in use for long periods of time.

Dallas Semi has

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some that work at 3.3v, you don't have to use the RTC unless you want to.

TI doesn't appear to have them in 3v yet, but they do work good. Maybe you could use them anyway.

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Plessey:

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Reply to
Earl Bollinger

Atmel Dataflashcard (AT45DBCxxx) can do the job if you can copy the contents to RAM code memory before execution. (It is an SPI connection)

You have 2/4 and 8 MByte options available. Your alternative is to build a module with a surface mount packaging.

Have no clue what vibration will do to it.

--
Best Regards
Ulf at atmel dot com
These comments are intended to be my own opinion and they
may, or may not be shared by my employer, Atmel Sweden.
Reply to
Ulf Samuelsson

JoeG schrieb:

The Multi Purpose Flash (MPF) from SST (SST39Fxxx) might also fit, however I'm not sure if they also offer 3V3 versions. (Probably they do.)

--
Dipl.-Ing. Tilmann Reh
Autometer GmbH Siegen - Elektronik nach Maß.
http://www.autometer.de

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In a world without walls and fences, who needs Windows and Gates ?
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Reply to
Tilmann Reh

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