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chip-specific docs
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@ -61,7 +61,8 @@ chips, allowing a 32KB chip to be programmed in just a few seconds.
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## PromDeviceSST39SF
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The SST39SF0x0 NOR Flash chips use fixed 4KB sectors that must be manually erased before a
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SST39SF0x0 NOR Flash chips are 5V-only chips that use a command register for program and
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erase operations. They use fixed 4K-byte sectors that must be manually erased before a
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new program operation, but the code manages this transparently. Whenever a write is
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started to a new segment, the driver first initiates an erase of that sector. A second
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write to the same sector will not cause an erase, so it is possible to write to a segment
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@ -69,14 +70,15 @@ multiple times with no additional steps as long as the writes are to different p
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the sector. For example, 256 bytes could be written to the start of a sector from one
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file and then 512 bytes could be written to the end of the sector from another file.
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Writing data that spans multiple sectors also works with no additional steps. When
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a sector boundary is crossed, the new sector is erased and set as the current sector.
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Writing data that spans multiple sectors also works with no additional steps. When a
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sector boundary is crossed, the new sector is erased and set as the current sector.
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The SST39SF driver supports a manual erase from the command line using the E command.
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This is only needed if data will be rewritten to the same location after a previous write
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to that sector.
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The SST39SF driver supports a manual erase from the command line using the E command. This
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is only needed if data will be rewritten to the same location after a previous write to
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that sector.
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All programming and erase operations for the 39SF chips require only a single 5V power supply.
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All programming and erase operations for the 39SF chips require only a single 5V power
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supply.
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## PromDeviceSST28SF
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@ -237,11 +239,15 @@ pulsing _WE_.
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|Model |Manufacturer |Type |Module |Notes|
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|:--- |:--- |:--- |:--- |:--- |
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|M27C4001 |ST Micro |EEPROM | |VCC=6.5V, VPP=12.75V to pgm|
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|M27C2001 |ST Micro |EPROM | |VCC=6.5V, VPP=12.75V to pgm|
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|M27C4001 |ST Micro |EPROM | |VCC=6.5V, VPP=12.75V to pgm|
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|W27C512 |Winbond |EEPROM |27 |Continual 12V or 14V for program/erase,VPP on OE|
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|AM28F512 |AMD |EEPROM | ||
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|AM29F040 |AMD |EEPROM | ||
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|AMS29AF010|AMS | | ||
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|AMS29AF010| | | ||
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|2764 |SEEQ |EPROM | ||
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|W29C040 |Winbond | | ||
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# Chip Manufacturers
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