A d v a n c e I n f o r m a t i o n
dow has expired. The status of the sector erase operation is determined three
ways:
Data# polling of the DQ7 pin
Checking the status of the toggle bit DQ6
Checking the status of the RY/BY# pin
Further status of device activity during the sector erase operation is determined
using toggle bit DQ2 (refer to DQ2: Toggle Bit II).
When the Embedded Erase algorithm is complete, the device returns to reading
array data, and addresses are no longer latched. Note that an address change is
required to begin read valid array data.
Figure 5 illustrates the Embedded™ Erase Algorithm, using a typical command
sequence and bus operation. Refer to the Erase/Program Operations tables in the
AC Characteristics section for parameters, and to Figures 21 and 22 for timing
diagrams.
START
Write Erase
Command Sequence
Data Poll
from System
Embedded
Erase
algorithm
in progress
No
Data = FFh?
Yes
Erasure Completed
Notes:
1. See Tables 19 and 20 for erase command sequence.
2. See DQ3: Sector Erase Timer for more information.
Figure 5. Erase Operation
Sector Erase and Program Suspend Command
The Sector Erase and Program Suspend command allows the user to interrupt a
Sector Erase or Program operation and perform data read or programs in a sector
that is not being erased or to the sector where a programming operation was ini-
tiated. This command is applicable only during the Sector Erase and
Programming operation, which includes the time-out period for Sector Erase.
52
S29CD032G
30606B0 March 22, 2004
SPANSION [ SPANSION ]
