IS25LD020 datasheet(10/40 Pages) ETC2

Part #	IS25LD020

Description	512Kbit/1 Mbit / 2 Mbit Single Operating Voltage Serial Flash Memory With 100 MHz Dual-Output SPI Bus Interface

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IS25CD512/010 & IS25LD020

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

Rev. C

08/12/2013

10

DEVICE OPERATION (CONTINUED)

RDID COMMAND (READ PRODUCT IDENTIFICATION)

OPERATION

The Read Product Identification (RDID) instruction is for

reading out the old style of 8-bit Electronic Signature, whose

values are shown as table of ID Definitions. This is not same

as RDID or JEDEC ID instruction. It’s not recommended to

use for new design. For new design, please use RDID or

JEDEC ID instruction.

The RDES instruction code is followed by three dummy

bytes, each bit being latched-in on SI during the rising

edge of SCK. Then the Device ID is shifted out on SO

with the MSB first, each bit been shifted out during the

falling edge of SCK. The RDES instruction is ended by

CE# goes high. The Device ID outputs repeatedly if

continuously send the additional clock cycles on SCK while

CE# is at low.

Table 11. Product Identification

Product Identification

Data

Manufacturer ID

First Byte

9Dh

Second Byte

7Fh

Device ID:

Device ID 1

Device ID 2

IS25CD512

05h

20h

IS25CD010

10h

21h

IS25LD020

11h

22h

Figure 3. Read Product Identification Sequence

0

1

8

31

38

39

46

47

54

HIGH IMPEDANCE

Device ID1

SCK

CE#

SI

SO

INSTRUCTION

9

7

1010 1011b

3 Dummy Bytes

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