EN29GL064ATB datasheet(21/58 Pages) EON

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This Data Sheet may be revised by subsequent versions

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or modifications due to changes in technical specifications.

EN29GL064AT/B

Rev. C, Issue Date: 2011/12/01

Polling on DQ7 is active for approximately 100 µs, then the device returns to the read mode. If not all

selected sectors are protected, the Embedded Erase algorithm erases the unprotected sectors, and

ignores the selected sectors that are protected. However, if the system reads DQ7 at an address within

a protected sector, the status may not be valid.

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.

Figure 7. Write Operation Status Flowchart

DQ6: Toggle Bit I

Toggle Bit I on DQ6 indicates whether an Embedded Program or Erase algorithm is in progress or

complete, or whether the device has entered the Erase Suspend mode. Toggle Bit I may be read at any

address, and is valid after the rising edge of the final WE# pulse in the command sequence (prior to the

program or erase operation), and during the sector erase time-out.

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