Wolfram Liebchen wrote:
>
> At 12:05 13.12.96 -0500, Stephen wrote:
> >I'm looking for a type of data storage memory which can be accessed serialy
> >while still written to and read from at speeds up to 10K bytes per second.
> >I need a minimum storage of 8K.  A write speed of 50K would be great.
> >
>
> Hi Stephen,
>
> you could use a 3-wire to bytewide converter (Dallas DS1280) and connect a
> standard SRAM or a nonvolatile SRAM (Dallas DS1230).
> This gives you SPI-bus access to a large RAM-size.
>
> Look at http://www.dalsemi.com/DocControl/index.html
> there is the information.
>
> regards,
>
> Wolfram
>
> +-----------------------------------------------------+
> | Wolfram Liebchen                                    |
> | Forschungsinstitut f|r Optik, T|bingen, Deutschland |
> | mailto:liebchen@ffo.fgan.de                         |
> +-----------------------------------------------------+

Serial sampling with DRAM:
      !4x sample clock
      !                    256Kx8 DRAM-module
*----------*                   *--------*
!20-bit  A0!------------------>!/CAS    !
!counter   !  *------------*   !        !
!        A1!--! 20ns delay !-->!/RAS    !
!          !  *------------*   !        !/--\
!       ...!                   !  D0..D7!     Din/
!          !                   !        !\--/ out
!          !------------------\!        !
!  A10..A19!                   !A0..A8  !
!          !------------------/!     /WE!---- R/W
!          !                   !     /OE!---- /OE
*----------*                   *--------*

Regards,
Jens Dyekjaer Madsen