GD25LQ64CSFS datasheet(12/77 Pages) GIGADEVICE

12 / 77 page

1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LQ64C

QE bit

The Quad Enable (QE) bit is a non-volatile Read/Write bit in the Status Register that allows Quad operation. When

the QE bit is set to 0 (Default) the WP# pin and HOLD# pin are enable. When the QE pin is set to 1, the Quad IO2 and IO3

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

supply or ground.)

LB3, LB2, LB1 bits

The LB3, LB2, LB1 bits are non-volatile One Time Program (OTP) bits in Status Register (S13-S11) that provide the

write protect control and status to the Security Registers. The default state of LB3-LB1 are 0, the security registers are

unlocked. The LB3-LB1 bits can be set to 1 individually using the Write Register instruction. The LB3-LB1 bits are One

Time Programmable, once they are 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 with 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.

SUS1, SUS2 bits

The SUS1 and SUS2 bits are read only bits in the status register (S15 and S10) that are set to 1 after executing an

Program/Erase Suspend (75H) command (The Erase Suspend will set the SUS1 to 1, and the Program Suspend will set

the SUS2 to 1). The SUS1 and SUS2 bits are cleared to 0 by Program/Erase Resume (7AH) command software reset

(66H+99H) command as well as a power-down, power-up cycle.

GD25LQ64CSFS Datasheet(PDF) 12 Page - GigaDevice Semiconductor (Beijing) Inc.