A D V A N C E I N F O R M A T I O N
Figure 22, Figure 24
REVISION SUMMARY
Added figures, which show different timings between
addresses, CLK, WE#, and AVD#.
Revision A (February 13, 2002)
Initial release.
Figure 25, Figure 27, Figure 28
Revision A+1 (February 19, 2002)
Automatic Sleep Mode
Added note to indicate AVD# must toggle during data
reads.
Clarified description to indicate that sleep mode is acti-
Figure 30, Figure 31
vated when the first CLK edge occurs after tACC
.
Shifted address, clock, and data cycle counts up by
one.
Figure 20, Asynchronous Program Operation
Timings
Revision A + 4 (July 26, 2002)
Table 1, Device Bus Operations
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.
Changed Synchronous Write to rising edge of CLK.
Revision A+2 (February 27, 2002)
Writing Commands/Command Sequences
Figure 21, Asynchronous Program Operation
Timings
Added CLK as part of the asynchronous write opera-
tion system drive.
Extended don’t care section of CLK to falling edge of
WE#.
Added VCC and VIO Power-up and Power-down
Sequencing section.
Revision A+3 (May 9, 2002)
AC Characteristics
Requirements for Synchronous (Burst) Read
Operation
Changed tCHW erase/program time from Min to Max.
Figure 20, Asynchronous Program Operation
Timings
Shifted address, clock, and data cycle references in
third paragraph up by one.
Changed tCSW1 reference to WE# from AVD#.
Table 4, System Interface String
Figure 21, Alternate Asynchronous Program
Operation Timings
Corrected data for address 23h.
Table 9, Initial Access Cycles vs. Frequency
Changed to show CLK low after tCHW time.
Added table.
Figure 22, Synchronous Program Operation
Timings
Autoselect Command Sequence
Removed tACH.
Added bottom boot device IDs to table.
Changed tAHW to tAVSW and added tCSW2.
Table 14, Command Definitions
Added bottom boot device IDs to table.
RDY: Ready
Figure 23, Alternate Synchronous Program
Operation Timings
Changed tAVCH to tAVHC.
Removed tACH.
Corrected address boundary from 63rd word/3Eh to
64th word/3Fh.
DC Characteristics, CMOS Compatible
DC Characteristics
Corrected ICCB OE# = VIL to = VIH; switched Typ. and
Max. values.
Added VIO = VIO min to test conditions for VOL and VOH
in table.
Erase/Program Operations table
Revision B (October 31, 2002)
Added specifications for parameters tCSW1, tCSW2
tCHW, tAHC
,
Global
.
Renamed Handshaking Enabled to Reduced
Wait-State Handshaking
Figure 21, Figure 23
Added note to indicate AVD# must toggle during
command sequence unlock cycles. Added tCSW1 to
Figure 21.
Renamed non-Handshaking to Standard Handshaking
October 31, 2002
Am29BDS640G
63
SPANSION [ SPANSION ]
