Cypress S29GL01GP, Manual, Page: 32 / 82

Document Number: 002-00886 Rev. *B Page 32 of 83
S29GL01GP
S29GL512P
S29GL256P
S29GL128P
Just prior to the completion of an Embedded Program or Erase operation, DQ7 may change asynchronously with DQ6-DQ0 while
Output Enable (OE#) is asserted low. That is, the device may change from providing status information to valid data on DQ7.
Depending on when the system samples the DQ7 output, it may read the status or valid data. Even if the device has completed the
program or erase operation and DQ7 has valid data, the data outputs on DQ6-DQ0 may be still invalid. Valid data on DQ7-D00
appears on successive read cycles.
See the following for more information: Table , shows the outputs for Data# Polling on DQ7. Figure 7.4 , shows the Data# Polling
algorithm; and Figure 11.7 , shows the Data# Polling timing diagram.
Figure 7.4
Write Operation Status Flowchart
Read_1
Read_2
Read_3
DQ6 Toggles between
Read_1 & Read_2
and
Read_2 & Read_3
WriteBuffer
program and
Read_1 DQ1 is
set
Read_1 DQ5 is
set
YES
NO
RETURN
WRITE ABORT
YES
YES
RETURN
TIME OUT
NO
NO
Read_1
Read_2
DQ2 Toggles NO
YES
RETURN
DONE
RETURN
SUSPEND
START
- DQ 6 toggles when programming
- DQ 6 and DQ 2 toggle when erasing
- DQ 2 toggles when erase suspend
- DQ 1 set when program error
- DQ 5 set when time out