M25P20VMP6T datasheet(18/41 Pages) STMICROELECTRONICS

No de pièce	M25P20VMP6T

Description	1 Mbit, Low Voltage, Serial Flash Memory With 25 MHz SPI Bus Interface

PDF	41 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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18 / 41 page

M25P10-A

18/41

Figure 12. Write Status Register (WRSR) Instruction Sequence

Table 7. Protection Modes

Note: 1. As defined by the values in the Block Protect (BP1, BP0) bits of the Status Register, as shown in Table 2.

Signal

SRWD

Bit

Mode

Write Protection of the Status

Memory Content

Protected Area(1)

Unprotected Area(1)

Software

Protected

(SPM)

Status Register is Writable (if the

WREN instruction has set the WEL

bit)

The values in the SRWD, BP1 and

BP0 bits can be changed

Protected against

Page Program, Sector

Erase and Bulk Erase

Ready to accept Page

Program and Sector

Erase instructions

Hardware

Protected

(HPM)

Status Register is Hardware write

protected

The values in the SRWD, BP1 and

BP0 bits cannot be changed

Protected against

Page Program, Sector

Erase and Bulk Erase

Ready to accept Page

Program and Sector

Erase instructions

AI02282D

3456789 10 11 12 13 14 15

High Impedance

Instruction

Status

765432

MSB

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