ES29LV160F Datasheet, PDF (30/71 Pages) Excel Semiconductor Inc. – 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

ES29LV160F
Excel Semiconductor Inc.
using DQ7, DQ6, DQ2, or RY/BY#. (Refer to Write Operation Status on page 33 for information on
these status bits.)
Figure 9.2 on page 31 illustrates the algorithm for the erase operation. Refer to Erase/Program
Operations on page 49 for parameters, and to Figure 17.6 on page 50 for timing diagrams.
9.8 Erase Suspend/Erase Resume Commands
The Erase Suspend command allows the system to interrupt a sector erase operation and then
read data from, or program data to, any sector not selected for erasure. This command is valid
only during the sector erase operation, including the 50 µs time-out period during the sector erase
command sequence. The Erase Suspend command is ignored if written during the chip erase
operation or Embedded Program algorithm. Writing the Erase Suspend command during the
Sector Erase time-out immediately terminates the time-out period and suspends the erase
operation. Addresses are don’t-cares when writing the Erase Suspend command.
When the Erase Suspend command is written during a sector erase operation, the device requires
a maximum of 20 µs to suspend the erase operation. However, when the Erase Suspend
command is written during the sector erase time-out, the device immediately terminates the time-
out period and suspends the erase operation.
After the erase operation has been suspended, the system can read array data from or program
data to any sector not selected for erasure. (The device “erase suspends” all sectors selected for
erasure.) Normal read and write timings and command definitions apply. Reading at any address
within erase-suspended sectors produces status data on DQ7–DQ0. The system can use DQ7, or
DQ6 and DQ2 together, to determine if a sector is actively erasing or is erase-suspended. See
Write Operation Status on page 33 for information on these status bits.
After an erase-suspended program operation is complete, the system can once again read array
data within non-suspended sectors. The system can determine the status of the program operation
using the DQ7 or DQ6 status bits, just as in the standard program operation. See Write Operation
Status on page 33 for more information.
The system may also write the autoselect command sequence when the device is in the Erase
Suspend mode. The device allows reading autoselect codes even at addresses within erasing
sectors, since the codes are not stored in the memory array. When the device exits the autoselect
mode, the device reverts to the Erase Suspend mode, and is ready for another valid operation.
See Autoselect Command Sequence on page 26 for more information.
The system must write the Erase Resume command (address bits are don’t care) to exit the erase
suspend mode and continue the sector erase operation. Further writes of the Resume command
are ignored. Another Erase Suspend command can be written after the device has resumed
erasing.
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