AS29LV800 ANADIGICS Inc, AS29LV800 Datasheet - Page 10

• Manufacturer Part Number: AS29LV800
• Description: 3V 1M8/512K16 CMOS Flash EEPROM
• Manufacturer: ANADIGICS Inc

AS29LV800
Status operations
Write operation status
DQ2 toggles when an erase-suspended sector is read repeatedly.
DQ6 toggles when any address is read repeatedly.
DQ2 = 1 if byte address being programmed is read during erase-suspend program mode.
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DATA polling (DQ7)
Toggle bit 1 (DQ6)
Exceeding time limit
(DQ5)
Sector erase timer
(DQ3)
Toggle bit 2 (DQ2)
Standard mode
Erase suspend mode
Exceeded time limits
DQ2 toggles when the read address applied points to a sector which is undergoing erase, suspended erase, or a failure to erase.
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Only active during automated on-chip algorithms or sector erase time outs. DQ7 reflects
complement of data last written when read during the automated on-chip program algorithm (0
during erase algorithm); reflects true data when read after completion of an automated on-chip
program algorithm (1 after completion of erase agorithm).
Active during automated on-chip algorithms or sector erase time outs. DQ6 toggles when CE or
OE toggles, or an Erase Resume command is invoked. DQ6 is valid after the rising edge of the
fourth pulse of WE during programming; after the rising edge of the sixth WE pulse during chip
erase; after the last rising edge of the sector erase WE pulse for sector erase. For protected
sectors,
DQ6 toggles for <1 µs during program mode writes, and <5 µs during erase (if all selected sectors
are protected).
Indicates unsuccessful completion of program/erase operation (DQ5 = 1). DATA polling remains
active. If DQ5 = 1 during chip erase, all or some sectors are defective; during byte programming
or sector erase, the sector is defective (in this case, reset the device and execute a program or
erase command sequence to continue working with functional sectors). Attempting to program 0
to 1 will set DQ5 = 1.
Checks whether sector erase timer window is open. If DQ3 = 1, erase is in progress; no
commands will be accepted. If DQ3 = 0, the device will accept sector erase commands. Check
DQ3 before and after each Sector Erase command to verify that the command was accepted.
During sector erase, DQ2 toggles with OE or CE only during an attempt to read a sector being
erased. During chip erase, DQ2 toggles with OE or CE for all addresses. If DQ5 = 1, DQ2 toggles
only at sector addresses where failure occurred, and will not toggle at other sector addresses. Use
DQ2 in conjunction with DQ6 to determine whether device is in auto erase or erase suspend
mode.
Status
Auto programming
Program/erase in auto erase
Read erasing sector
Read non-erasing sector
Program in erase suspend
Auto programming (byte)
Program/erase in auto erase
Program in erase suspend
(non-erase suspended sector)
ALLIANCE SEMICONDUCTOR
DQ7
DQ7
0
1
Data
DQ7
DQ7
0
DQ7
®
DQ6
Toggle
Toggle
No toggle
Data
Toggle
Toggle
Toggle
Toggle
DQ5
0
0
0
Data
0
1
1
1
DQ3
N/A
1
N/A
Data
N/A
N/A
N/A
N/A
DQ2
No toggle
Toggle
Toggle
Data
Toggle
No toggle
Toggle
No toggle
DID 11-40002-A. 10/19/00
October 2000
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†
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RY/BY
0
0
1
1
0
1
1
1