AT25DF161_13 datasheet(16/52 Pages) ETC2

16 / 52 page

AT25DF161

the logical “0” state. Likewise, an erase operation is not allowed to a sector that has been program suspended. If

attempted, the erase operation will abort and the WEL bit in the Status Register will be reset to a logical “0” state.

During an Erase Suspend, a program operation to a different 64-Kbyte sector can be started and subsequently suspended.

This results in a simultaneous Erase Suspend/Program Suspend condition and will be indicated by the states of both the ES

and PS bits in the Status Register being set to the logical “1” state.

If a Reset operation (see “Reset” on page 35) is performed while a sector is erase suspended, the suspend operation will

abort and the contents of the block in the suspended sector will be left in an undefined state. However, if a Reset is

performed while a sector is program suspended, the suspend operation will abort but only the contents of the page that

was being programmed and subsequently suspended will be undefined. The remaining pages in the 64-Kbyte sector will

retain their previous contents.

If an attempt is made to perform an operation that is not allowed during a program or erase suspend, such as a Protect

Sector operation, then the device will simply ignore the opcode and no operation will be performed. The state of the WEL

bit in the Status Register, as well as the SPRL (Sector Protection Registers Locked) and SLE (Sector Lockdown Enabled)

bits, will not be affected..

Table 8-1.

Operations Allowed and Not Allowed During a Program or Erase Suspend

Command

Operation During

Program Suspend

Operation During

Erase Suspend

Read Commands

Read Array (All Opcodes)

Allowed

Program and Erase Commands

Block Erase

Not Allowed

Chip Erase

Not Allowed

Byte/Page Program (All Opcodes)

Not Allowed

Allowed

Program/Erase Suspend

Not Allowed

Allowed

Program/Erase Resume

Allowed

Protection Commands

Write Enable

Not Allowed

Allowed

Write Disable

Not Allowed

Allowed

Protect Sector

Not Allowed

Unprotect Sector

Not Allowed

Global Protect/Unprotect

Not Allowed

Read Sector Protection Registers

Allowed

Security Commands

Sector Lockdown

Not Allowed

Freeze Sector Lockdown State

Not Allowed

Read Sector Lockdown Registers

Allowed

Program OTP Security Register

Not Allowed

Read OTP Security Register

Allowed

Status Register Commands

Read Status Register

Allowed

Write Status Register (All Opcodes)

Not Allowed

3687H–DFLASH–5/2013

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