IS25LP032 datasheet(63/90 Pages) ISSI

63 / 90 page

IS25LP032/064/128

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

Rev. D

10/03/2014

8.34 INFORMATION ROW READ OPERATION (IRRD, 68h)

The IRRD instruction is used to read memory data at up to a 133MHz clock in the voltage range, 2.7V to 3.6V.

The IRRD instruction code is followed by three address bytes (A23 - A0) and a dummy byte, transmitted via the

SI line, with each bit latched-in during the rising edge of SCK. Then the first data byte addressed is shifted out

on the SO line, with each bit shifted out at a maximum frequency fCT, during the falling edge of SCK.

The address is automatically incremented after each byte of data is shifted out. When the highest address is

reached, the address counter will roll over to the 000000h address, allowing the entire memory to be read with a

single IRRD instruction. The IRRD instruction is terminated by driving CE# high (VIH). If a IRRD instruction is

issued while an Erase, Program or Write cycle is in process (WIP=1) the instruction is ignored and will not have

any effects on the current cycle

Figure 8.50 IRRD COMMAND (Information Row Read) OPERATION

Instruction = 68h

Dummy Byte

CE #

SCK

...

Mode 3

Mode 0

3 Byte Address

Data Out

IS25LP032 Datasheet(PDF) 63 Page - Integrated Silicon Solution, Inc