Albatron Technology ARM11/Cortex-A8

bdiGDB

for GNU Debugger, BDI2000 (ARM11/Cortex-A8) 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

Am29F010 AM29F - - 0x020000

Am29F800B AM29BX8 AM29BX16 - 0x100000

Am29DL323C AM29BX8 AM29BX16 - 0x400000

Am29PDL128G - AM29DX16 AM29DX32 0x01000000

Intel 28F032B3 I28BX8 - - 0x400000

Intel 28F640J3A STRATAX8 STRATAX16 - 0x800000

Intel 28F320C3 - I28BX16 - 0x400000

AT49BV040 AT49 - - 0x080000

AT49BV1614 AT49X8 AT49X16 - 0x200000

M58BW016BT - - M58X32 0x200000

SST39VF160 - AT49X16 - 0x200000

Am29LV320M MIRRORX8 MIRRORX16 - 0x400000