Re: IDT 7130 Dual Port Ram help

"PravinPawar" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Hello,
> I am interfacing IDT with 8051 controller on both sides.
> The left sides only writes while the right side only reads the data.
>
> I have made the following wiring
> OE_    -- manually toggled by 8051 port bit
> r/w_   -- connected to wr_ of 8051
> ce_    -- connected to rd_ of 8051
> busy_  -- connected to Vcc
> INT_   -- connected to Vcc
>
> I get problem when i read the data. i am not reading the same location
> at the same time. Instead i first write all the locations from
> 0000h - 03ffh .By that time the reading controller is in a delay loop
> I am able to read first 60 locations ,however the upper locations give
> wrong value .i output the vaues on hyperterminal.
> If i read the individual upper locations ,i can read it,so it is
> probably not a write problem
> Now if i refresh the values ,that is if i re-write the locations again
> after a certain delay ,the values outputted are correct.
>
> What can be the possible problem ,is it a timming problem??
> My RD_ pulse is 250nsec and CE_ pulse is 3 Microseconds.
>
> Please help me .
>
> Thanks,
> Pravin

Leave busy and INT unconnected, tie CE_ to port bit of 8051 and OE_ to rd_
of 8051...

regards