GD5F1GQ4REFJS datasheet(15/60 Pages) GIGADEVICE

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SPI(x1/x2/x4) NAND Flash

FEATURE OPERATIONS

7.1 Get Features (0FH) and Set Features (1FH)

The GET FEATURES (0FH) and SET FEATURES (1FH) commands are used to monitor the device status and alter the

device behavior. These commands use a 1-byte feature address to determine which feature is to be read or modified.

Features such as OTP and block locking can be enabled or disabled by setting specific feature bits (shown in the following

table). The status register is mostly read, except WEL, which is a writable bit with the WRITE ENABLE (06H) command.

When a feature is set, it remains active until the device is power cycled or the feature is written to. Unless otherwise

specified in the following table, once the device is set, it remains set, even if a RESET (FFH) command is issued.

Table7-1. Features Settings

Addr.

Protection

A0H

BRWD

Reserved

BP2

BP1

BP0

INV

CMP

Reserved

Feature

B0H

OTP_PRT

OTP_EN

Reserved

ECC_EN

Reserved

Status

C0H

Reserved

ECCS1

ECCS0

P_FAIL

E_FAIL

WEL

OIP

Feature

D0H

HOLDB/RST

DS_S1

DS_S0

Reserved

Status

F0H

Reserved

ECCSE1

ECCSE0

Reserved

Note:

If BRWD is enabled and WP# is LOW, then the block lock register cannot be changed.

If QE is enabled, the quad IO operations can be executed.

All the reserved bits must be held low when the feature is set.

00h is the default data byte value for Output Driver Register after power-up.

HOLDB/RST is for WSON8 Package only. By default HOLDB/RST registers is 0 after power-on-reset or hardware

reset, and this bit default is HOLD function.

Figure7-1. Get Features Sequence Diagram

Command

0FH

CS#

SCLK

High-Z

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

MSB

1 byte address

Data byte

MSB

Note: The output would be updated by real-time, until CS# is driven high.

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