IS25LP256D-RGLA3 datasheet(20/174 Pages) ISSI

20 / 174 page

IS25LP256D

IS25WP256D

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

Rev A6

04/15/2019

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 (Dedicated RESET# Disable bit in Functional

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

IS25LP256D-RGLA3 Datasheet(PDF) 20 Page - Integrated Silicon Solution, Inc

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