IS25LE512M-RMLA3:P-TY datasheet(107/189 Pages) ISSI

107 / 189 page

IS25LE512M

IS25WE512M

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

107

Rev. A6

06/16/2025

8.26 SET READ PARAMETERS OPERATION (SRPNV: 65h, SRPV: C0h/63h)

Set Read Parameter Bits

This device supports configurable burst length and dummy cycles in both SPI and QPI mode by setting three bits

(P2, P1, P0) and four bits (P6, P5, P4, P3) within the Read Register, respectively. To set those bits the SRPNV

and SRPV operation instruction are used. Details regarding burst length and dummy cycles can be found in Table

6.9, Table 6.10, and Table 6.11. HOLD#/RESET# function selection (P7) bit in the Read Register can be set with

the SRPNV and SRPV operation as well, in order to select HOLD#/RESET# pin as RESET# or HOLD#.

For the device with dedicated RESET# pin (or ball), RESET# pin (or ball) will be a separate pin (or ball) and it is

independent of the P7 bit setting in Read Register.

SRPNV is used to set the non-volatile Read Register, while SRPV is used to set the volatile Read Register.

To write non-volatile Read Parameter bits, a standard Write Enable (06h) instruction must previously have been

executed

for the device to accept SRPNV(65h) instruction (Status Register bit WEL must equal “1”).

To write volatile Read Parameter bits (SRPV), 63h or C0h command can be used.

When using 63h instruction, a standard Write Enable (06h) instruction must previously have been executed for the

device to accept SRPV (63h) instruction (Status Register bit WEL must equal “1”).

But C0h instruction does not require a standard Write Enable (06h) operation. (Status Register bit WEL remains

“0”).

Note: When SRPNV is executed, the volatile Read Register is set as well as the non-volatile Read Register.

Figure 8.59 Set Read Parameters Sequence In SPI Mode

Instruction = 65h or C0h/63h

CE #

SCK

Data In

Mode 3

Mode 0

High Impedence

Figure 8.60 Set Read Parameters Sequence In QPI Mode

65h or

C0h/63h

Mode 3

Mode 0

7:4

3:0

CE#

SCK

IO[3:0]

Data In

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