lakshmi3489
Guest
Thu Feb 25, 2010 12:51 pm
1. If I look at the spartan 3a 3400 dsp evaluation board schematic there i
as SPI EEPROM. Looking at the part number it is a part number for a FLAS
by Microchip(M25P16-VMW6G).
2. Looking at this example xspi_stm_flash_example.c though he mentions th
same part number M25P16.
Then why the name SPI EEPROM??????
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RCIngham
Guest
Thu Feb 25, 2010 3:00 pm
Quote:
1. If I look at the spartan 3a 3400 dsp evaluation board schematic ther
is
as SPI EEPROM. Looking at the part number it is a part number for a FLASH
by Microchip(M25P16-VMW6G).
2. Looking at this example xspi_stm_flash_example.c though he mention
the
same part number M25P16.
Then why the name SPI EEPROM??????
Why SPI? Because the part is accessed via an SPI interface?
Why EEPROM? Because "Flash" indicates a sub-type of "Electrically Erasabl
Programmable Read-Only Memory" that can be erased either in total or larg
segments.
It appears that not everyone is old enough to remember "non-Flash
EEPROMs.
HTH!
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james
Guest
Thu Feb 25, 2010 3:38 pm
On Thu, 25 Feb 2010 08:00:18 -0600, "RCIngham"
<robert.ingham_at_n_o_s_p_a_m.gmail.com> wrote:
|It appears that not everyone is old enough to remember "non-Flash"
|EEPROMs.
|===============
I remember the old days of 2708 EPROMS. Those were a great step up
from the old TTL PROMS. What a radicle idea then to use UV light to
erase and then reprogram.
james
johnp
Guest
Thu Feb 25, 2010 5:01 pm
On Feb 25, 6:38 am, james <bu...@bud.u> wrote:
Quote:
On Thu, 25 Feb 2010 08:00:18 -0600, "RCIngham"
robert.ingham_at_n_o_s_p_a_m.gmail.com> wrote:
|It appears that not everyone is old enough to remember "non-Flash"
|EEPROMs.
|==============
I remember the old days of 2708 EPROMS. Those were a great step up
from the old TTL PROMS. What a radicle idea then to use UV light to
erase and then reprogram.
james
2708? Those were to easy to program. Try the old 1702A... -48V
programming. Ouch. As I recall,
the Intel programmer had big power transistors. Touch to program, but
a whooping 256 bytes of memory.
John Providenza
austin
Guest
Fri Feb 26, 2010 12:04 am
John,
I just love the Dilbert cartoon where they try to out-do each other
about the 'old days:'
"I used to program in 1's and 0's!"
"That's nothing, all we had were l's and O's ( small letter L and
capital letter O)"
"Heck, all I had were 0's...."
Yes, I have some 1702's, along with the 4004 4 bit CPU, and some 2102
SRAM devices Intel handed out to customers to "introduce" them to the
microcomputer.
I just remember that if you put the 1702 in the socket rotated 180
degrees, it blew out all the bond wires. Someone came to the lab one
day saying "did you know that the EPROM lights up when you program
it?"
Austin
johnp
Guest
Fri Feb 26, 2010 5:46 am
On Feb 25, 2:04 pm, austin <aus...@xilinx.com> wrote:
Quote:
John,
I just love the Dilbert cartoon where they try to out-do each other
about the 'old days:'
"I used to program in 1's and 0's!"
"That's nothing, all we had were l's and O's ( small letter L and
capital letter O)"
"Heck, all I had were 0's...."
Yes, I have some 1702's, along with the 4004 4 bit CPU, and some 2102
SRAM devices Intel handed out to customers to "introduce" them to the
microcomputer.
I just remember that if you put the 1702 in the socket rotated 180
degrees, it blew out all the bond wires. Someone came to the lab one
day saying "did you know that the EPROM lights up when you program
it?"
Austin
Austin -
I was at a company that create a dual 4004 syetem for reading digital
holograms. It was quite an
eye opener for me - senior in high school working at a company with a
ton of leading edge technology.
I still have my 4004 programming cheat-sheet.
John
