IS25LE512M-RGLA3:P-TY datasheet(29/189 Pages) ISSI

29 / 189 page

IS25LE512M

IS25WE512M

Integrated Silicon Solution, Inc.- www.issi.com

Rev. A6

06/16/2025

6.3 READ REGISTER AND EXTENDED REGISTER

Read Register format and bit definitions are described below. Read Register and Extended Read Register consist

of a pair of rewritable non-volatile register and volatile register, respectively. During power up sequence, volatile

6.3.1 READ REGISTER

Table 6.7 and Table 6.8 define all bits that control features in SPI/QPI modes. HOLD#/RESET# pin selection (P7)

bit is used to select HOLD# pin or RESET# pin in SPI mode when QE=“0” for the device with HOLD#/RESET#.

When QE=1 or in QPI mode, P7 bit setting will be ignored since the pin becomes IO3.

For 16-pin SOIC or 24-ball TFBGA with dedicated RESET# device, HOLD# will be selected regardless of P7 bit

setting when QE=“0” in SPI mode.

The Dummy Cycle bits (P6, P5, P4, P3) define how many dummy cycles are used during various READ modes.

The wrap selection bits (P2, P1, P0) define burst length with an enable bit.

The SET READ PARAMETERS Operations (SRPNV: 65h, SRPV: C0h or 63h) are used to set all the Read Register

bits, and can thereby define HOLD#/RESET# pin (or ball) selection, dummy cycles, and burst length with wrap

around. SRPNV is used to set the non-volatile register and SRPV is used to set the volatile register.

Table 6.7 Read Register Parameter Bit Table

HOLD#/

RESET#

Dummy

Cycles

Dummy

Cycles

Dummy

Cycles

Dummy

Cycles

Wrap

Enable

Burst

Length

Burst

Length

Default

Table 6.8 Read Register Bit Definition

Bit

Name

Definition

Read-

/Write

Type

Burst Length

R/W

Non-Volatile

and Volatile

Burst Length

R/W

Non-Volatile

and Volatile

Burst Length

Set Enable

Burst Length Set Enable Bit:

"0" indicates disable (default)

"1" indicates enable

R/W

Non-Volatile

and Volatile

Dummy Cycles

Number of Dummy Cycles:

Bits1 to Bit4 can be toggled to select the number of dummy cycles

(1 to 15 cycles)

R/W

Non-Volatile

and Volatile

Dummy Cycles

R/W

Non-Volatile

and Volatile

Dummy Cycles

R/W

Non-Volatile

and Volatile

Dummy Cycles

R/W

Non-Volatile

and Volatile

HOLD#/

RESET#

HOLD#/RESET# function selection Bit:

"0" indicates the HOLD# function is selected (default)

"1" indicates the RESET# function is selected

R/W

Non-Volatile

and Volatile

Table 6.9 Burst Length Data

8 bytes

16 bytes

32 bytes

64 bytes

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