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| Table of Contents |
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Latest NEWS
| Date | From | |
|---|---|---|
| 31/08/17 | Note | The 5v successor for the A29040C called A29040D has not appeared. See Future of 5v Flash Chips for more information |
| 24/02/17 | AMIC Technology | We are designing a successor for the A29040C called A29040D. This part will become available in Q2. In case you consider the 3 volt option we advise A29L040B which is also in design and will be released in Q3 this year. All these new designs are necessary to transfer to new wafer processes allowing long term availability. With best regards, Rob |
Introduction
It has been around seven years since the current Flash card was designed. At that time it was done in a rush, without much research, as the AMD 1M chip was being withdrawn and the footprint for that device needed to be changed. As the footprint was a lot smaller, there was enough space on the PCB to add a 512K Flash and 1M RAM. The cost of manufacturing a PCB is based on the size of the card, if the 512K/512 Flash/RAM configuration worked or not, the cost would have been the same (although the workload in the design would have been a lot less!).
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| Device | Package | Manufacturer | Sectors | ||
|---|---|---|---|---|---|
 | AM29F800BB-55EF | 48-Pin TSOP | SPANSION | 64 Kbyte |
Spansion are putting their 1M AMD Flash chips on End of Life EOL.
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AMIC may have had some 5v replacements A29800, A29801 these are no longer available.
The package is slightly larger, they do not fully match.
Once stocks of the Am29F080B device are depleted, there is no replacement.
512K Flash 5v
The following device is available 23/02/17
| Device | Package | Manufacturer | Sectors | ||
|---|---|---|---|---|---|
| SST39SF040-70-4C-NHE | PLCC | MICROCHIP | 4 Kbyte sectors |
NOTE: The Z88 will not be able to program this chip due to the 4 Kbyte sectors. It may be programmed with an external programmer.
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| Device | Package | Manufacturer | Sectors | ||
|---|---|---|---|---|---|
| A29040C-55F | DIP 32 | AMIC | 64 Kbyte | ||
 | A29040CL-55F | PLCC | AMIC | 64 Kbyte |
The following devices were available 27/07/2013
| Device | Package | Manufacturer | Sectors | ||
|---|---|---|---|---|---|
| A29040B-70F | DIP 32 | AMIC | 64 Kbyte sectors | ||
| A29040BL-70F | PLCC | AMIC | 64 Kbyte sectors | |
 | A29040BV-70F | 32 TSOP | AMIC | 64 Kbyte sectors | |
| AM29F040B-55JF | PLCC | SPANSION | 64 Kbyte sectors | |
| AM29F040B-90JF | PLCC | SPANSION | 64 Kbyte sectors | |
| A29L040L-70F | PLCC | AMIC | 64 Kbyte sectors | |
| SST39SF040-70-4C-NHE | PLCC | MICROCHIP | Uniform 4KByte sectors | |
| SST39SF040-70-4I-NHE | PLCC | Uniform 4KByte sectors | ||
| SST39SF040-70-4I-WHE | 32 TSOP | Uniform 4KByte sectors |
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| Device | Package | Manufacturer | Sectors | ||
|---|---|---|---|---|---|
| A29010L-70F | PLCC | AMIC | 64 Kbyte sectors | |
| A29010V-70F | 32 TSOP | AMIC | 64 Kbyte sectors | |
| AM29F010B-70JF | PLCC | SPANSION | 64 Kbyte sectors | |
| SST39SF010A-70-4C-NHE | PLCC | MICROCHIP | Uniform 4KByte sectors | |
| SST39SF010A-70-4C-WHE | 32 TSOP | MICROCHIP | Uniform 4KByte sectors | |
| SST39SF010A-70-4I-NHE | PLCC | MICROCHIP | Uniform 4KByte sectors | |
| SST39SF010A-70-4I-WHE | 32 TSOP | MICROCHIP | Uniform 4KByte sectors | |
| SST39SF010A-70-4C-PHE | DIP 32 | MICROCHIP | Uniform 4KByte sectors |
OR Gates
We might need an OR gate for /CE, POE to POE_S
| Device | Package | Manufacturer | |
|---|---|---|---|
| MC74VHC32DR2G | SOIC | ON SEMICONDUCTOR |
Conclusion
- There is no life left for the 1M Flash chips.
- The 512K size was the most cost effective and the 64 sector version was manufactured two companies.
- 128K is not a lot cheaper than the 512K and is uneconomic to use.
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