S25FS256S datasheet(69/154 Pages) SPANSION

69 / 154 page

November 6, 2013 S25FS-S_00_04

S25FS-S Family

Da ta

Shee t

(Prelim i nar y )

8.6.5

Configuration Register 3

Configuration Register 3 controls certain command behaviors. The register bits can be read and changed

using the Read Any Register and Write Any Register commands. The non-volatile register provides the POR,

hardware reset, or software reset state of the controls. These configuration bits are OTP and may be

programmed to their opposite state one time during system configuration if needed. The volatile version of

Configuration Register 3 allows the configuration to be changed during system operation or testing.

8.6.5.1

Configuration Register 3 Non-Volatile (CR3NV)

Related Commands: Read Any Register (RDAR 65h), Write Any Register (WRAR 71h).

Blank Check Non-Volatile CR3NV[5]: This bit controls the POR, hardware reset, or software reset state of

the blank check during erase feature.

02h Non-Volatile CR3NV[4]: This bit controls the POR, hardware reset, or software reset state of the Page

Programming Buffer address wrap point.

20h Non-Volatile CR3NV[3]: This bit controls the POR, hardware reset, or software reset state of the

availability of 4-kB parameter sectors in the main flash array address map.

30h Non-Volatile CR3NV[2]: This bit controls the POR, hardware reset, or software reset state of the 30h

instruction code is used.

D8h Non-Volatile CR3NV[1]: This bit controls the POR, hardware reset, or software reset state of the

configuration for the size of the area erased by the D8h or DCh instructions.

F0h Non-Volatile CR3NV[0]: This bit controls the POR, hardware reset, or software reset state of the

availability of the Spansion legacy FL-S family software reset instruction.

Table 8.22 Configuration Register 3 Non-Volatile (CR3NV)

Bits

Field Name

Function

Type

Default

State

Description

RFU

Reserved

OTP

Reserved for Future Use.

RFU

Reserved

Reserved for Future Use.

BC_NV

Blank Check

1 = Blank Check during erase enabled.

0 = Blank Check disabled.

02h_NV

Page Buffer Wrap

1 = Wrap at 512 bytes.

0 = Wrap at 256 bytes.

20h_NV

4-kB Erase

1 = 4-kB Erase disabled (Uniform Sector Architecture).

0 = 4-kB Erase enabled (Hybrid Sector Architecture).

30h_NV

Clear Status /

Resume Select

1 = 30h is Erase or Program Resume command.

0 = 30h is clear status command.

D8h_NV

Block Erase Size

1 = 256-kB Erase.

0 = 64-kB Erase.

F0h_NV

Legacy Software

Reset Enable

1 = F0h software reset is enabled.

0 = F0h software reset is disabled (ignored).

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