S25FS256S datasheet(74/154 Pages) SPANSION

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S25FS-S Family

S25FS-S_00_04 November 6, 2013

Data

Sheet

(Pre limin ar y)

8.6.8

Password Register (PASS)

Related Commands: Password Read (PASSRD E7h) and Password Program (PASSP E8h), Read Any

used to permanently define a password for the Advanced Sector Protection (ASP) feature. PASS does not

have user programmable volatile bits, all defined bits are OTP. A volatile copy of PASS is used to satisfy read

latency requirements but the volatile register is not user writable or further described.

8.6.9

PPB Lock Register (PPBL)

Related Commands: PPB Lock Read (PLBRD A7h, PLBWR A6h), Read Any Register (RDAR 65h).

PPBL does not have separate user programmable non-volatile bits, all defined bits are volatile read only

status. The default state of the RFU bits is set by hardware. The default state of the PPBLOCK bit is defined

by the ASP protection mode bits in ASPR[2:1]. There is no non-volatile version of the PPBL register.

The PPBLOCK bit is used to protect the PPB bits. When PPBL[0] = 0, the PPB bits can not be programmed.

8.6.10

PPB Access Register (PPBAR)

Related Commands: PPB Read (PPBRD FCh or 4PPBRD E2h), PPB Program (PPBP FDh or 4PPBP E3h),

PPB Erase (PPBE E4h).

PPBAR does not have user writable volatile bits, all PPB array bits are non-volatile. The default state of the

PPB array is erased to FFh by Spansion. There is no volatile version of the PPBAR register.

Table 8.28 Password Register (PASS)

Bits

Field

Name

Function

Type

Default State

Description

63 to 0

PWD

Hidden

Password

OTP

FFFFFFFF-

FFFFFFFFh

Non-Volatile OTP storage of 64-bit password. The password is

no longer readable after the password protection mode is

selected by programming ASP register bit 2 to 0.

Table 8.29 PPB Lock Register (PPBL)

Bits

Field Name

Function

Type

Default State

Description

7 to 1

RFU

Reserved

Volatile

00h

Reserved for Future Use

PPBLOCK

Protect PPB Array

Volatile

Read

Only

ASPR[2:1] = 1xb = Persistent

Protection Mode = 1

ASPR[2:1] = 01b = Password

Protection Mode = 0

0 = PPB array protected.

1 = PPB array may be programmed or erased.

Table 8.30 PPB Access Register (PPBAR)

Bits

Field Name

Function

Type

Default State

Description

7 to 0

PPB

Read or Program

per sector PPB

Non-Volatile

FFh

00h = PPB for the sector addressed by the PPBRD or

PPBP command is programmed to 0, protecting that

sector from program or erase operations.

FFh = PPB for the sector addressed by the PPBRD

command is 1, not protecting that sector from program

or erase operations.

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