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Why isn't there any EEPROM in STM32F4 MCUs?
Frequent Write to Non-volatile MemoryWhat's the catch with FRAM?STM32F4 - DMA with bigger stepsWhy do most of the non-volatile memories have logical 1 as the default state?Is it possible to have a MCU work at -55 degree, with specification of -40 to 85 degree working environment?STM32 “USB Device” vs. “USB OTG HS” - what is the difference?STM32F4 Timer accuracy and jitterWhen to re-enable WP pin on EEPROM?Are there any wifi chipsets out there that don't have an internal uC or require Linux?Finding an EEPROM substitute
$begingroup$
Why isn't there any EEPROM in the STM32F4 series MCUs?
Mostly I have Microchip MCUs and they have EEPROM available in them, but I just found out that it is not available in the STM32F4 MCUs... And it looks like not in other families as 'F0, F1, F2 and F3 either.
Is there a way around to save parameter values in the absence of an EEPROM?
microcontroller stm32 stm32f4 eeprom non-volatile-memory
edited 6 mins ago
Peter Mortensen
1,60031422
asked 14 hours ago
scico111scico111
30810
$endgroup$
|
show 1 more comment
$begingroup$
Why isn't there any EEPROM in the STM32F4 series MCUs?
Mostly I have Microchip MCUs and they have EEPROM available in them, but I just found out that it is not available in the STM32F4 MCUs... And it looks like not in other families as 'F0, F1, F2 and F3 either.
Is there a way around to save parameter values in the absence of an EEPROM?
microcontroller stm32 stm32f4 eeprom non-volatile-memory
edited 6 mins ago
Peter Mortensen
1,60031422
asked 14 hours ago
scico111scico111
30810
$endgroup$
2
$begingroup$
"What could be a good reason?" questions do not fit within the Stack Exchange mission, and "such an important memory area" is very application-determined. Looks like no EEPROM in the STM32L4's either, but the L0's and L1's have it. Or you can add an extra chip if you have a need for which emulation won't work.
$endgroup$
– Chris Stratton
14 hours ago
3
$begingroup$
That would be entirely application dependent. Since you've said nothing about what you are trying to do for a question which would have to consider the specifics in extreme detail, no one can help you.
$endgroup$
– Chris Stratton
14 hours ago
2
$begingroup$
The most likely explanation is that the application(s) for which the chip was initially developed did not require it. Remember, EVERY chip ever developed was designed for a specific large-volumne application, and only later added to the manufacturer's general catalog. The overhead of a new chip design is just too high to allow designing chips speculatively.
$endgroup$
– Dave Tweed♦
13 hours ago
1
$begingroup$
"such an important memory area" - important to who? I'm currently working on a project using an STM32F4 device and I would have no use whatsoever for a little bit of internal EEPROM. The extra cost it would add to the device would certainly make a difference though.
$endgroup$
– brhans
13 hours ago
2
$begingroup$
Small amounts of external EEPROM are not terribly expensive.
$endgroup$
– mkeith
5 hours ago
|
show 1 more comment
$begingroup$
Why isn't there any EEPROM in the STM32F4 series MCUs?
Mostly I have Microchip MCUs and they have EEPROM available in them, but I just found out that it is not available in the STM32F4 MCUs... And it looks like not in other families as 'F0, F1, F2 and F3 either.
Is there a way around to save parameter values in the absence of an EEPROM?
microcontroller stm32 stm32f4 eeprom non-volatile-memory
edited 6 mins ago
Peter Mortensen
1,60031422
asked 14 hours ago
scico111scico111
30810
$endgroup$
Why isn't there any EEPROM in the STM32F4 series MCUs?
Mostly I have Microchip MCUs and they have EEPROM available in them, but I just found out that it is not available in the STM32F4 MCUs... And it looks like not in other families as 'F0, F1, F2 and F3 either.
Is there a way around to save parameter values in the absence of an EEPROM?
microcontroller stm32 stm32f4 eeprom non-volatile-memory
microcontroller stm32 stm32f4 eeprom non-volatile-memory
edited 6 mins ago
Peter Mortensen
1,60031422
asked 14 hours ago
scico111scico111
30810
edited 6 mins ago
Peter Mortensen
1,60031422
asked 14 hours ago
scico111scico111
30810
edited 6 mins ago
Peter Mortensen
1,60031422
edited 6 mins ago
Peter Mortensen
1,60031422
edited 6 mins ago
Peter Mortensen
1,60031422
1,60031422
asked 14 hours ago
scico111scico111
30810
asked 14 hours ago
scico111scico111
30810
asked 14 hours ago
scico111scico111
30810
30810
2
$begingroup$
"What could be a good reason?" questions do not fit within the Stack Exchange mission, and "such an important memory area" is very application-determined. Looks like no EEPROM in the STM32L4's either, but the L0's and L1's have it. Or you can add an extra chip if you have a need for which emulation won't work.
$endgroup$
– Chris Stratton
14 hours ago
3
$begingroup$
That would be entirely application dependent. Since you've said nothing about what you are trying to do for a question which would have to consider the specifics in extreme detail, no one can help you.
$endgroup$
– Chris Stratton
14 hours ago
2
$begingroup$
The most likely explanation is that the application(s) for which the chip was initially developed did not require it. Remember, EVERY chip ever developed was designed for a specific large-volumne application, and only later added to the manufacturer's general catalog. The overhead of a new chip design is just too high to allow designing chips speculatively.
$endgroup$
– Dave Tweed♦
13 hours ago
1
$begingroup$
"such an important memory area" - important to who? I'm currently working on a project using an STM32F4 device and I would have no use whatsoever for a little bit of internal EEPROM. The extra cost it would add to the device would certainly make a difference though.
$endgroup$
– brhans
13 hours ago
2
$begingroup$
Small amounts of external EEPROM are not terribly expensive.
$endgroup$
– mkeith
5 hours ago
|
show 1 more comment
2
$begingroup$
"What could be a good reason?" questions do not fit within the Stack Exchange mission, and "such an important memory area" is very application-determined. Looks like no EEPROM in the STM32L4's either, but the L0's and L1's have it. Or you can add an extra chip if you have a need for which emulation won't work.
$endgroup$
– Chris Stratton
14 hours ago
3
$begingroup$
That would be entirely application dependent. Since you've said nothing about what you are trying to do for a question which would have to consider the specifics in extreme detail, no one can help you.
$endgroup$
– Chris Stratton
14 hours ago
2
$begingroup$
The most likely explanation is that the application(s) for which the chip was initially developed did not require it. Remember, EVERY chip ever developed was designed for a specific large-volumne application, and only later added to the manufacturer's general catalog. The overhead of a new chip design is just too high to allow designing chips speculatively.
$endgroup$
– Dave Tweed♦
13 hours ago
1
$begingroup$
"such an important memory area" - important to who? I'm currently working on a project using an STM32F4 device and I would have no use whatsoever for a little bit of internal EEPROM. The extra cost it would add to the device would certainly make a difference though.
$endgroup$
– brhans
13 hours ago
2
$begingroup$
Small amounts of external EEPROM are not terribly expensive.
$endgroup$
– mkeith
5 hours ago
2
2
$begingroup$
"What could be a good reason?" questions do not fit within the Stack Exchange mission, and "such an important memory area" is very application-determined. Looks like no EEPROM in the STM32L4's either, but the L0's and L1's have it. Or you can add an extra chip if you have a need for which emulation won't work.
$endgroup$
– Chris Stratton
14 hours ago
$begingroup$
"What could be a good reason?" questions do not fit within the Stack Exchange mission, and "such an important memory area" is very application-determined. Looks like no EEPROM in the STM32L4's either, but the L0's and L1's have it. Or you can add an extra chip if you have a need for which emulation won't work.
$endgroup$
– Chris Stratton
14 hours ago
3
3
$begingroup$
That would be entirely application dependent. Since you've said nothing about what you are trying to do for a question which would have to consider the specifics in extreme detail, no one can help you.
$endgroup$
– Chris Stratton
14 hours ago
$begingroup$
That would be entirely application dependent. Since you've said nothing about what you are trying to do for a question which would have to consider the specifics in extreme detail, no one can help you.
$endgroup$
– Chris Stratton
14 hours ago
2
2
$begingroup$
The most likely explanation is that the application(s) for which the chip was initially developed did not require it. Remember, EVERY chip ever developed was designed for a specific large-volumne application, and only later added to the manufacturer's general catalog. The overhead of a new chip design is just too high to allow designing chips speculatively.
$endgroup$
– Dave Tweed♦
13 hours ago
$begingroup$
The most likely explanation is that the application(s) for which the chip was initially developed did not require it. Remember, EVERY chip ever developed was designed for a specific large-volumne application, and only later added to the manufacturer's general catalog. The overhead of a new chip design is just too high to allow designing chips speculatively.
$endgroup$
– Dave Tweed♦
13 hours ago
1
1
$begingroup$
"such an important memory area" - important to who? I'm currently working on a project using an STM32F4 device and I would have no use whatsoever for a little bit of internal EEPROM. The extra cost it would add to the device would certainly make a difference though.
$endgroup$
– brhans
13 hours ago
$begingroup$
"such an important memory area" - important to who? I'm currently working on a project using an STM32F4 device and I would have no use whatsoever for a little bit of internal EEPROM. The extra cost it would add to the device would certainly make a difference though.
$endgroup$
– brhans
13 hours ago
2
2
$begingroup$
Small amounts of external EEPROM are not terribly expensive.
$endgroup$
– mkeith
5 hours ago
$begingroup$
Small amounts of external EEPROM are not terribly expensive.
$endgroup$
– mkeith
5 hours ago
|
show 1 more comment
2 Answers
2
active
oldest
votes
$begingroup$
All STM32 MCUs have self-programmable flash memory. If you need to store user settings, you can store them in an area of flash.
ST provides a library to perform EEPROM emulation on the STM32F4. (There are similar libraries for most of their other parts as well.) Even if you don't plan on using that library, their application note explaining how it works may be interesting to read.
answered 14 hours ago
duskwuffduskwuff
17.5k32752
$endgroup$
3
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
add a comment |
$begingroup$
EEPROM is very expensive in terms of cell size (leading to a larger die and hence higher cost). Manufacturers started trying to get rid of EEPROM as soon as the first Flash based controllers were released.
Especially when you consider the varying user requirements for the amount of EEPROM, it makes more sense to emulate in Flash, despite the limitations. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512.
answered 8 hours ago
elchambroelchambro
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
All STM32 MCUs have self-programmable flash memory. If you need to store user settings, you can store them in an area of flash.
ST provides a library to perform EEPROM emulation on the STM32F4. (There are similar libraries for most of their other parts as well.) Even if you don't plan on using that library, their application note explaining how it works may be interesting to read.
answered 14 hours ago
duskwuffduskwuff
17.5k32752
$endgroup$
3
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
add a comment |
$begingroup$
All STM32 MCUs have self-programmable flash memory. If you need to store user settings, you can store them in an area of flash.
ST provides a library to perform EEPROM emulation on the STM32F4. (There are similar libraries for most of their other parts as well.) Even if you don't plan on using that library, their application note explaining how it works may be interesting to read.
answered 14 hours ago
duskwuffduskwuff
17.5k32752
$endgroup$
3
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
add a comment |
$begingroup$
All STM32 MCUs have self-programmable flash memory. If you need to store user settings, you can store them in an area of flash.
ST provides a library to perform EEPROM emulation on the STM32F4. (There are similar libraries for most of their other parts as well.) Even if you don't plan on using that library, their application note explaining how it works may be interesting to read.
answered 14 hours ago
duskwuffduskwuff
17.5k32752
$endgroup$
All STM32 MCUs have self-programmable flash memory. If you need to store user settings, you can store them in an area of flash.
ST provides a library to perform EEPROM emulation on the STM32F4. (There are similar libraries for most of their other parts as well.) Even if you don't plan on using that library, their application note explaining how it works may be interesting to read.
answered 14 hours ago
duskwuffduskwuff
17.5k32752
edited 14 hours ago
answered 14 hours ago
duskwuffduskwuff
17.5k32752
answered 14 hours ago
duskwuffduskwuff
17.5k32752
answered 14 hours ago
duskwuffduskwuff
17.5k32752
17.5k32752
3
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
add a comment |
3
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
3
3
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
This is correct but it is a poor substitute. The CPU cannot execute while the flash is being written or erased, and erasing takes a long time. There are tricks (multi flash banks, ram functions) but none are as tidy as just having an internal eeprom like AVR and PIC.
$endgroup$
– Jon
14 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
$begingroup$
@Jon of 577 Microchip PIC32 and Atmel 32 bit MCUs currently in production, only 63 have Data EEPROM. microchip.com/ParamChartSearch/…
$endgroup$
– Bruce Abbott
12 hours ago
add a comment |
$begingroup$
EEPROM is very expensive in terms of cell size (leading to a larger die and hence higher cost). Manufacturers started trying to get rid of EEPROM as soon as the first Flash based controllers were released.
Especially when you consider the varying user requirements for the amount of EEPROM, it makes more sense to emulate in Flash, despite the limitations. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512.
answered 8 hours ago
elchambroelchambro
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
EEPROM is very expensive in terms of cell size (leading to a larger die and hence higher cost). Manufacturers started trying to get rid of EEPROM as soon as the first Flash based controllers were released.
Especially when you consider the varying user requirements for the amount of EEPROM, it makes more sense to emulate in Flash, despite the limitations. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512.
answered 8 hours ago
elchambroelchambro
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
EEPROM is very expensive in terms of cell size (leading to a larger die and hence higher cost). Manufacturers started trying to get rid of EEPROM as soon as the first Flash based controllers were released.
Especially when you consider the varying user requirements for the amount of EEPROM, it makes more sense to emulate in Flash, despite the limitations. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512.
answered 8 hours ago
elchambroelchambro
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
EEPROM is very expensive in terms of cell size (leading to a larger die and hence higher cost). Manufacturers started trying to get rid of EEPROM as soon as the first Flash based controllers were released.
Especially when you consider the varying user requirements for the amount of EEPROM, it makes more sense to emulate in Flash, despite the limitations. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512.
answered 8 hours ago
elchambroelchambro
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 8 hours ago
elchambroelchambro
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 8 hours ago
elchambroelchambro
711
answered 8 hours ago
elchambroelchambro
711
711
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
elchambro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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$begingroup$
"What could be a good reason?" questions do not fit within the Stack Exchange mission, and "such an important memory area" is very application-determined. Looks like no EEPROM in the STM32L4's either, but the L0's and L1's have it. Or you can add an extra chip if you have a need for which emulation won't work.
$endgroup$
– Chris Stratton
14 hours ago
3
$begingroup$
That would be entirely application dependent. Since you've said nothing about what you are trying to do for a question which would have to consider the specifics in extreme detail, no one can help you.
$endgroup$
– Chris Stratton
14 hours ago
2
$begingroup$
The most likely explanation is that the application(s) for which the chip was initially developed did not require it. Remember, EVERY chip ever developed was designed for a specific large-volumne application, and only later added to the manufacturer's general catalog. The overhead of a new chip design is just too high to allow designing chips speculatively.
$endgroup$
– Dave Tweed♦
13 hours ago
1
$begingroup$
"such an important memory area" - important to who? I'm currently working on a project using an STM32F4 device and I would have no use whatsoever for a little bit of internal EEPROM. The extra cost it would add to the device would certainly make a difference though.
$endgroup$
– brhans
13 hours ago
2
$begingroup$
Small amounts of external EEPROM are not terribly expensive.
$endgroup$
– mkeith
5 hours ago