AM29BDS640G datasheet(75/77 Pages) AMD

75 / 77 page

May 9, 2006 25903C2

Am29BDS640G

Data

Sheet

Revision Summary

Revision A (February 13, 2002)

Initial release.

Revision A+1 (February 19, 2002)

Automatic Sleep Mode

Clarified description to indicate that sleep mode is activated when the first CLK

edge occurs after tACC.

Figure 20, Asynchronous Program Operation Timings

Modified to show that CLK is don’t care prior to AVD# going low, and that AVD#

must not be low before CE# transitions low.

Revision A+2 (February 27, 2002)

Figure 21, Asynchronous Program Operation Timings

Extended don’t care section of CLK to falling edge of WE#.

Revision A+3 (May 9, 2002)

Requirements for Synchronous (Burst) Read Operation

Shifted address, clock, and data cycle references in third paragraph up by one.

Table 4, System Interface String

Corrected data for address 23h.

Table 9, Initial Access Cycles vs. Frequency

Added table.

Autoselect Command Sequence

Added bottom boot device IDs to table.

Table 13, Command Definitions

Added bottom boot device IDs to table.

RDY: Ready

Corrected address boundary from 63rd word/3Eh to 64th word/3Fh.

DC Characteristics

Added VIO = VIO min to test conditions for VOL and VOH in table.

Erase/Program Operations table

Added specifications for parameters tCSW1, tCSW2, tCHW, tAHC.

Figures 21, 23

Added note to indicate AVD# must toggle during command sequence unlock cy-

cles. Added tCSW1 to 21.

Figures 22, 24

Added figures, which show different timings between addresses, CLK, WE#, and

AVD#.

Figures 25, 27, 28

Added note to indicate AVD# must toggle during data reads.

Figures 30, 31

Shifted address, clock, and data cycle counts up by one.

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