Have you any code to spare?
(Might speed me up a bit)

I'm looking at the Samsung 681000 and also the Hitachi 628128 128kb x 8
devices at the moment.



At 07:12 04/03/98 -0800, you wrote:
>   Adrian, I have a couple of 16C74A projects that use external SRAM with
>built-in Clock/Calendars. Check out Dallas Semiconductor products if you
>are interested in combined SRAM, RTCC, Crystal, and Battery. I use Port E
>and D as you described. In one project I use a 512KByte Dallas SRAM/RTCC
>with an external address decoder and address latches. In another I use a
>version that multiplexes the address and data lines. They have several
>such devices. In addition to RD/WR/CS, you need ALE (Address Latch Enable)
>and upper/lower address strobe inputs. You can get them with or without
>internal clocks and batteries.
>
>   - Tom
>
>At 06:24 AM 3/3/98 -0500, you wrote:
>>I intend to interface an SRAM using 3 or 4 bits of Port A (RA0,1,2,5) as
>>A15:17, RC0:5 as A8:15, Port D as D0:7, and RE0:3 for CS, OE, and WR.
>>
>>The first lash-up will use a 6116, moving on to the biggest SRAM for which
>>I have enough i/o lines. It'll be battery backed.
>>
>>I've half-seriously considered serial-flash but don't want to suffer the
>>erase time periodically since RS232 data is coming in on other Port A bits
>>(software UART) and going out on RC6:7 (hardware UART) most of the time.
>>
>>Has anyone done something similar before?
>>Comments?
>>
>>Regards
>>
>>Adrian
>>
>>WWW    WWW   Adrian Gothard
>>WWW WW WWW   White Horse Design
>>WWWWWWWWWW   0385-970009, 01189-628913/628914, 0976-387778 (obsolete)
>>WWWW  WWWW   whd@zetnet.co.uk
>>WWWW  WWWW   http://www.users.zetnet.co.uk
>>---
>>Developers of GPS satellite-based tracking systems
>>
>>
>
>
Regards

Adrian

WWW    WWW   Adrian Gothard
WWW WW WWW   White Horse Design
WWWWWWWWWW   0385-970009, 01189-628913/628914, 0976-387778 (obsolete)
WWWW  WWWW   whd@zetnet.co.uk
WWWW  WWWW   http://www.users.zetnet.co.uk/whd
---
Developers of GPS satellite-based tracking systems