S25FS256S datasheet(119/154 Pages) SPANSION

119 / 154 page

November 6, 2013 S25FS-S_00_04

S25FS-S Family

119

Da ta

Shee t

(Prelim i nar y )

10.6.4

Evaluate Erase Status (EES D0h)

The Evaluate Erase Status (EES) command verifies that the last erase operation on the addressed sector

was completed successfully. If the selected sector was successfully erased the Erase Status bit (SR2V[2]) is

set to 1. If the selected sector was not completely erased SR2V[2] is 0.

The EES command can be used to detect erase operations failed due to loss of power, reset, or failure during

the erase operation.

The EES instruction is followed by a 3- or 4-byte address, depending on the address length configuration

(CR2V[7]). The EES command requires tEES to complete and update the Erase Status in SR2V. The WIP bit

(SR1V[0]) may be read using the RDSR1 (05h) command, to determine when the EES command is finished.

Then the RDSR2 (07h) or the RDAR (65h) command can be used to read SR2V[2]. If a sector is found not

erased with SR2V[2]=0, the sector must be erased again to ensure reliable storage of data in the sector.

The Write Enable command (to set the WEL bit) is not required before the EES command. However, the WEL

bit is set by the device itself and cleared at the end of the operation, as visible in SR1V[1] when reading

status.

Figure 10.51 EES Command Sequence

Note:

1. A = MSB of address = A23 for CR2V[7]=0, or A31 for CR2V[7]=1.

This command is also supported in QPI Mode. In QPI Mode the instruction is shifted in on IO0-IO3, two clock

cycles per byte.

Figure 10.52 EES QPI Mode Command Sequence

Note:

1. A = MSB of address = A23 for CR2V[7]=0, or A31 for CR2V[7]=1.

CS#

SCK

Phase

Instruction

Address

CS#

SCLK

IO0

IO1

IO2

IO3

Phase

A-3

A-2

A-1

Instructtion

Address

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