S25FS256S datasheet(62/154 Pages) SPANSION

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S25FS-S Family

S25FS-S_00_04 November 6, 2013

Data

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(Pre limin ar y)

Write Enable Latch (WEL) SR1V[1]: The WEL bit must be set to 1 to enable program, write, or erase

operations as a means to provide protection against inadvertent changes to memory or register values. The

Write Enable (WREN) command execution sets the Write Enable Latch to a 1 to allow any program, erase, or

write commands to execute afterwards. The Write Disable (WRDI) command can be used to set the Write

Enable Latch to a 1 to prevent all program, erase, and write commands from execution. The WEL bit is

cleared to 0 at the end of any successful program, write, or erase operation. Following a failed operation the

WEL bit may remain set and should be cleared with a WRDI command following a CLSR command. After a

power-down / power-up sequence, hardware reset, or software reset, the Write Enable Latch is set to a 0 The

WRR or WRAR command does not affect this bit.

Write-In-Progress (WIP) SR1V[0]: Indicates whether the device is performing a program, write, erase

operation, or any other operation, during which a new operation command will be ignored. When the bit is set

to a 1 the device is busy performing an operation. While WIP is 1, only Read Status (RDSR1 or RDSR2),

Read Any Register (RDAR), Erase Suspend (ERSP), Program Suspend (PGSP), Clear Status Register

(CLSR), and software reset (RESET) commands are accepted. ERSP and PGSP will only be accepted if

memory array erase or program operations are in progress. The Status Register E_ERR and P_ERR bits are

updated while WIP =1. When P_ERR or E_ERR bits are set to 1, the WIP bit will remain set to 1 indicating the

device remains busy and unable to receive new operation commands. A Clear Status Register (CLSR)

command must be received to return the device to standby mode. When the WIP bit is cleared to 0 no

operation is in progress. This is a read-only bit.

8.6.2

Status Register 2 Volatile (SR2V)

Related Commands: Read Status Register 2 (RDSR2 07h), Read Any Register (RDAR 65h).

Status Register 2 does not have user programmable non-volatile bits, all defined bits are volatile read only

status. The default state of these bits are set by hardware.

Erase Status (ESTAT) SR2V[2]: The Erase Status bit indicates whether the sector, selected by an

immediately preceding Erase Status command, completed the last Erase command on that sector. The Erase

Status command must be issued immediately before reading SR2V to get valid Erase Status. Reading SR2V

during a program or erase suspend does not provide valid Erase Status. The Erase Status bit can be used by

system software to detect any sector that failed its last erase operation. This can be used to detect erase

operations failed due to loss of power during the erase operation.

Erase Suspend (ES) SR2V[1]: The Erase Suspend bit is used to determine when the device is in Erase

Suspend mode. This is a status bit that cannot be written by the user. When Erase Suspend bit is set to 1, the

device is in Erase Suspend mode. When Erase Suspend bit is cleared to 0, the device is not in erase

suspend mode. Refer to Section 10.6.5, Program or Erase Suspend (PES 85h, 75h, B0h) on page 120 for

details about the Erase Suspend/Resume commands.

Program Suspend (PS) SR2V[0]: The Program Suspend bit is used to determine when the device is in

Program Suspend mode. This is a status bit that cannot be written by the user. When Program Suspend bit is

set to 1, the device is in Program Suspend mode. When the Program Suspend bit is cleared to 0, the device

is not in Program Suspend mode. Refer to Section 10.6.5, Program or Erase Suspend (PES 85h, 75h, B0h)

on page 120 for details.

Table 8.16 Status Register 2 Volatile (SR2V)

Bits

Field Name

Function

Type

Default State

Description

RFU

Reserved

Reserved for Future Use.

RFU

Reserved

Reserved for Future Use.

RFU

Reserved

Reserved for Future Use.

RFU

Reserved

Reserved for Future Use.

RFU

Reserved

Reserved for Future Use.

ESTAT

Erase Status

Volatile

Read Only

1 = Sector Erase Status command result =

Erase Completed.

0 = Sector Erase Status command result =

Erase Not Completed.

Erase Suspend

Volatile

Read Only

1 = In Erase Suspend mode.

0 = Not in Erase Suspend mode.

Program

Suspend

Volatile

Read Only

1 = In Program Suspend mode.

0 = Not in Program Suspend mode.

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