S25FL256SDSMFV800 데이터 시트보기 (PDF) - Cypress Semiconductor

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S25FL256SDSMFV800

128 Mbit (16 Mbyte), 256 Mbit (32 Mbyte) 3.0V SPI Flash Memory

Cypress Semiconductor 

S25FL128S, S25FL256S

Table 10.23 ASP Register (ASPR)

Bits

15 to 9

8

7

6

5

4

3

2

1

0

Field Name

RFU

RFU

RFU

RFU

RFU

RFU

RFU

PWDMLB

PSTMLB

RFU

Function

Reserved

Reserved

Reserved

Reserved

Reserved

Reserved

Reserved

Password

Protection Mode

Lock Bit

Persistent

Protection Mode

Lock Bit

Reserved

Type

OTP

OTP

OTP

OTP

OTP

OTP

OTP

OTP

OTP

OTP

Default

State

1

(Note 1)

(Note 1)

1

(Note 1)

(Note 1)

(Note 1)

Reserved for Future Use

Reserved for Future Use

Reserved for Future Use

Reserved for Future Use

Reserved for Future Use

Reserved for Future Use

Reserved for Future Use

Description

1

0 = Password Protection Mode Permanently Enabled.

1 = Password Protection Mode not Permanently Enabled.

1

0 = Persistent Protection Mode Permanently Enabled.

1 = Persistent Protection Mode not Permanently Enabled.

1

Reserved for Future Use

Note:

1. Default value depends on ordering part number, see Initial Delivery State on page 135.

Table 10.24 Password Register (PASS)

Bits

Field

Name

63 to 0

PWD

Function

Hidden

Password

Type

OTP

Default State

FFFFFFFF-

FFFFFFFFh

Description

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 zero.

Table 10.25 PPB Lock Register (PPBL)

Bits

7 to 1

0

Field Name

RFU

Function

Reserved

PPBLOCK Protect PPB Array

Type

Volatile

Volatile

Default State

Description

00h

Reserved for Future Use

Persistent Protection Mode = 1

Password Protection Mode = 0

0 = PPB array protected until next power

cycle or hardware reset

1 = PPB array may be programmed or erased

Table 10.26 PPB Access Register (PPBAR)

Bits

Field Name

Function

Type

7 to 0

PPB

Read or Program per

sector PPB

Non-volatile

Default

State

FFh

Description

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 or

PPBP command is erased to ‘1’, not protecting that

sector from program or erase operations.

Document Number: 001-98283 Rev. *I

Page 134 of 144

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