| Author |
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David Sidlauskas
Guest
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 Posted:
Mon Dec 06, 2004 12:06 am Post subject:
8 Bit up With Lots Of RAM |
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Does anyone know of an 8 bit microprocessor with at least 32K of SRAM and
32K of Flash? Or any number of bits if it's cheap (<$7 @ 1K).
Many thanks in advance.
Dave Sidlauskas |
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Mike Harrison
Guest
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| Posted:
Mon Dec 06, 2004 2:13 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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On Sun, 05 Dec 2004 19:06:33 GMT, "David Sidlauskas" <dsidlauskas@worldnet.att.net> wrote:
| Quote: | Does anyone know of an 8 bit microprocessor with at least 32K of SRAM and
32K of Flash? Or any number of bits if it's cheap (<$7 @ 1K).
Many thanks in advance.
Dave Sidlauskas
You may find it cheaper to hook an external SRAM to an I/O port, or maybe use one of the AVRs that |
have extarnal bus interface |
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hamilton
Guest
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| Posted:
Mon Dec 06, 2004 2:25 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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Mike Harrison wrote:
| Quote: |
You may find it cheaper to hook an external SRAM to an I/O port, or maybe use one of the AVRs that
have extarnal bus interface
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Mike,
Which ARV has an external buss interface ???? |
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Grant Edwards
Guest
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| Posted:
Mon Dec 06, 2004 3:10 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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On 2004-12-05, David Sidlauskas <dsidlauskas@worldnet.att.net> wrote:
| Quote: | Does anyone know of an 8 bit microprocessor with at least 32K of SRAM and
32K of Flash? Or any number of bits if it's cheap (<$7 @ 1K).
|
Renesas (Hitachi) H8/300 3062 "value series" + 32K SRAM totals
about $5.50.
It doesn't meet your other spec's though: it has 128K of flash
and is a 32-bit CPU. ;)
Oh, and the tools are free.
--
Grant Edwards grante Yow! Darling, my ELBOW
at is FLYING over FRANKFURT,
visi.com Germany... |
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Karl Olsen
Guest
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| Posted:
Mon Dec 06, 2004 4:00 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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David Sidlauskas <dsidlauskas@worldnet.att.net> wrote:
| Quote: | Does anyone know of an 8 bit microprocessor with at least 32K of SRAM
and 32K of Flash? Or any number of bits if it's cheap (<$7 @ 1K).
|
The Philips LPC2105 has 128KB flash and 32KB RAM.
http://www.semiconductors.philips.com/pip/LPC2105.html
Karl Olsen |
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Jim Granville
Guest
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| Posted:
Mon Dec 06, 2004 4:07 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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David Sidlauskas wrote:
| Quote: | Does anyone know of an 8 bit microprocessor with at least 32K of SRAM and
32K of Flash? Or any number of bits if it's cheap (<$7 @ 1K).
Many thanks in advance.
|
The large RAM makes that a thin space, but your choices are
- uPSD from ST, some with 32K XRAM blocks.
- ARM uC from Philips, Atmel have models with 64K
- New DS80C401 from Dallas(maxim) has 64K RAM
Ramtron have also just released FM25L256, which behaves
just like 32K serial SRAM, up to 25MHz SPI. |
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Jeroen
Guest
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| Posted:
Mon Dec 06, 2004 4:48 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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"hamilton" <hamilton@deminsional.com> wrote in message
news:41b37c88_3@omega.dimensional.com...
| Quote: | Mike Harrison wrote:
You may find it cheaper to hook an external SRAM to an I/O port, or
maybe use one of the AVRs that
have extarnal bus interface
Mike,
Which ARV has an external buss interface ????
|
Mega128/64/161/162/103/8515, S8515/4414, CAN128 |
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hamilton
Guest
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| Posted:
Mon Dec 06, 2004 5:33 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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Jeroen wrote:
| Quote: | "hamilton" <hamilton@deminsional.com> wrote in message
news:41b37c88_3@omega.dimensional.com...
Mike Harrison wrote:
You may find it cheaper to hook an external SRAM to an I/O port, or
maybe use one of the AVRs that
have extarnal bus interface
Mike,
Which ARV has an external buss interface ????
Mega128/64/161/162/103/8515, S8515/4414, CAN128
Can code be run from external memory ??? |
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Brett Foster
Guest
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| Posted:
Mon Dec 06, 2004 6:05 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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hamilton wrote:
| Quote: | Jeroen wrote:
"hamilton" <hamilton@deminsional.com> wrote in message
news:41b37c88_3@omega.dimensional.com...
Mike Harrison wrote:
You may find it cheaper to hook an external SRAM to an I/O port, or
maybe use one of the AVRs that
have extarnal bus interface
Mike,
Which ARV has an external buss interface ????
Mega128/64/161/162/103/8515, S8515/4414, CAN128
Can code be run from external memory ???
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No, but it has 128KB of program memory. It's also self programmable. |
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hamilton
Guest
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| Posted:
Mon Dec 06, 2004 6:41 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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Brett Foster wrote:
| Quote: | No, but it has 128KB of program memory. It's also self programmable.
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Thank you for the information. |
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Ulf Samuelsson
Guest
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| Posted:
Tue Dec 07, 2004 12:48 am Post subject:
Re: 8 Bit up With Lots Of RAM |
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"David Sidlauskas" <dsidlauskas@worldnet.att.net> skrev i meddelandet
news:Z_Isd.1036513$Gx4.944798@bgtnsc04-news.ops.worldnet.att.net...
| Quote: | Does anyone know of an 8 bit microprocessor with at least 32K of SRAM and
32K of Flash? Or any number of bits if it's cheap (<$7 @ 1K).
Many thanks in advance.
Dave Sidlauskas
|
The lowest cost AVR with this functionality is the ATmega64. It has 64 kB of
internal flash
and you can connect a latch + 32 kB of SRAM.
If you can fit into 16 kB of Flash, then the ATmega162 will do the job.
For ARM the AT91SAM7S128 which samples in January will have 128 kB of Flash
and 32 kB of SRAM.
The AT91R40008 has 256 KB of SRAM onchip, and needs external (8 bit flash)
will do the job as well.
Copy the 8 bit flash into the SRAM and then you have 60 MIPS.
May be on the border for price, but it is nice to develop in SRAM compared
to flash.
--
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. |
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Markus Zingg
Guest
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| Posted:
Tue Dec 07, 2004 3:12 pm Post subject:
Re: 8 Bit up With Lots Of RAM |
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Take a look at the Renesas M16C familly - ok, 31KB of ram, but lots of
flash (up to 512KB) easy to use and cheap.
Markus |
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