IS25LP064A-RGLA1 datasheet(24/99 Pages) ISSI

24 / 99 page

IS25LP064A/032A

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

Rev. A

11/06/2015

8.1 NORMAL READ OPERATION (NORD, 03h)

The NORMAL READ (NORD) instruction is used to read memory contents of the IS25LP064A/032A at a

maximum frequency of 50MHz.

The NORD instruction code is transmitted via the SI line, followed by three address bytes (A23 - A0) of the first

memory location to be read. A total of 24 address bits are shifted in, but only AMSB (most significant bit) - A0 are

decoded. The remaining bits (A23

– AMSB+1) are ignored. The first byte addressed can be at any memory

location. Upon completion, any data on the SI will be ignored. Refer to Table 8.2 for the related Address Key.

The first byte data (D7 - D0) is shifted out on the SO line, MSB first. A single byte of data, or up to the whole

memory array, can be read out in one NORMAL READ instruction. The address is automatically incremented by

one after each byte of data is shifted out. The read operation can be terminated at any time by driving CE# high

(VIH) after the data comes out. When the highest address of the device is reached, the address counter will roll

over to the 000000h address, allowing the entire memory to be read in one continuous READ instruction.

If the NORMAL READ instruction is issued while an Erase, Program or Write operation is in process (WIP=1)

the instruction is ignored and will not have any effects on the current operation.

Table 8.2 Address Key

Address

IS25LP064A

IS25LP032A

AMSB – A0

A23 - A0 (A23=X)

A23 - A0 (A23,A22=X)

X=Don’t Care

IS25LP064A-RGLA1 데이터시트(PDF) 24 Page - Integrated Silicon Solution, Inc