bdiGDB for GNU Debugger, BDI2000 | User Manual 36 |
Supported Flash Memories:
There are currently 3 standard flash algorithm supported. The AMD, Intel and Atmel AT49 algorithm. Almost all currently available flash memories can be programmed with one of this algorithm. The flash type selects the appropriate algorithm and gives additional information about the used flash.
For 8bit only flash: | AM29F (MIRROR), I28BX8, AT49 |
For 8/16 bit flash in 8bit mode: | AM29BX8 (MIRRORX8), I28BX8 (STRATAX8), AT49X8 |
For 8/16 bit flash in 16bit mode: | AM29BX16 (MIRRORX16), I28BX16 (STRATAX16), AT49X16 |
For 16bit only flash: | AM29BX16, I28BX16, AT49X16 |
For 16/32 bit flash in 16bit mode: | AM29DX16 |
For 16/32 bit flash in 32bit mode: | AM29DX32 |
For 32bit only flash: | M58X32 |
Some newer Spansion MirrorBit flashes cannot be programmed with the MIRRORX16 algorithm be- cause of the used unlock address offset. Use S29M32X16 for these flashes.
The AMD and AT49 algorithm are almost the same. The only difference is, that the AT49 algorithm does not check for the AMD status bit 5 (Exceeded Timing Limits).
Only the AMD and AT49 algorithm support chip erase. Block erase is only supported with the AT49 algorithm. If the algorithm does not support the selected mode, sector erase is performed. If the chip does not support the selected mode, erasing will fail. The erase command sequence is different only in the 6th write cycle. Depending on the selected mode, the following data is written in this cycle (see also flash data sheets): 0x10 for chip erase, 0x30 for sector erase, 0x50 for block erase.
To speed up programming of Intel Strata Flash and AMD MirrorBit Flash, an additional algorithm is implemented that makes use of the write buffer. This algorithm needs a workspace, otherwise the standard Intel/AMD algorithm is used.
The following table shows some examples:
Flash | x 8 | x 16 | x 32 | Chipsize |
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Am29F010 | AM29F | - | - | 0x020000 |
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Am29F800B | AM29BX8 | AM29BX16 | - | 0x100000 |
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Am29DL323C | AM29BX8 | AM29BX16 | - | 0x400000 |
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Am29PDL128G | - | AM29DX16 | AM29DX32 | 0x01000000 |
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Intel 28F032B3 | I28BX8 | - | - | 0x400000 |
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Intel 28F640J3A | STRATAX8 | STRATAX16 | - | 0x800000 |
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Intel 28F320C3 | - | I28BX16 | - | 0x400000 |
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AT49BV040 | AT49 | - | - | 0x080000 |
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AT49BV1614 | AT49X8 | AT49X16 | - | 0x200000 |
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M58BW016BT | - | - | M58X32 | 0x200000 |
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SST39VF160 | - | AT49X16 | - | 0x200000 |
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Am29LV320M | MIRRORX8 | MIRRORX16 | - | 0x400000 |
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© Copyright | V 1.04 |
