GD25Q40CSFG datasheet(12/64 Pages) GIGADEVICE

12 / 64 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q40C

pins are enabled. (It is best to set the QE bit to 0 to avoid short issues if the WP# or HOLD# pin is tied directly to the power

supply or ground.)

LB bit.

The LB bit is a non-volatile One Time Program (OTP) bit in Status Register (S10) that provide the write protect control

and status to the Security Registers. The default state of LB is 0, the security registers are unlocked. LB can be set to 1

individually using the Write Register instruction. LB is One Time Programmable, once it’s set to 1, the Security Registers

will become read-only permanently.

CMP bit

The CMP bit is a non-volatile Read/Write bit in the Status Register (S14). It is used in conjunction the BP4-BP0 bits

to provide more flexibility for the array protection. Please see the Status registers Memory Protection table for details. The

default setting is CMP=0.

HPF bit

The High Performance Flag (HPF) bit indicates the status of High Performance Mode (HPM). When HPF bit sets to 1,

it means the device is in High Performance Mode, when HPF bit sets 0 (default), it means the device is not in High

Performance Mode.

SUS bit

The SUS bit is a read only bit in the status register (S15) that is set to 1 after executing an Erase/Program Suspend

(75H) command. The SUS bit is cleared to 0 by Erase/Program Resume (7AH) command as well as a power-down, power-

up cycle.

GD25Q40CSFG Scheda tecnica(PDF) 12 Page - GigaDevice Semiconductor (Beijing) Inc.