IS25LE512M-RLLA3:P-TY datasheet(116/189 Pages) ISSI

116 / 189 page

IS25LE512M

IS25WE512M

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

116

Rev. A6

06/16/2025

8.33 READ DEVICE MANUFACTURER AND DEVICE ID OPERATION (RDMDID, 90h)

The Read Device Manufacturer and Device ID (RDMDID) instruction allows the user to read the Manufacturer and

product ID of devices. Refer to Table 8.8 Product Identification for Manufacturer ID and Device ID. The RDMDID

instruction code is followed by two dummy bytes and one byte address (A7~A0), each bit being latched-in on SI

during the rising edge of SCK. If one byte address is initially set as A0 = 0, then the Manufacturer ID is shifted out

on SO with the MSB first followed by the device ID (ID7- ID0). Each bit is shifted out during the falling edge of SCK.

If one byte address is initially set as A0 = 1, then Device ID7-ID0 will be read first followed by the Manufacturer ID.

The Manufacturer and Device ID can be read continuously alternating between the two until CE# is driven high.

Figure 8.73 Read Product Identification by RDMDID Sequence In SPI Mode (A0=0)

Instruction = 90h

Manufacturer ID

(MF7-MF0)

CE #

SCK

Device ID

(ID7-ID0)

...

Mode 3

Mode 0

3-byte Address

Notes:

1. ADDRESS A0 = 0, will output the 1-byte Manufacturer ID (MF7-MF0)

→ 1-byte Device ID (ID7-ID0)

ADDRESS A0 = 1, will output the 1-byte Device ID (ID7-ID0)

→ 1-byte Manufacturer ID (MF7-MF0)

2. The Manufacturer and Device ID can be read continuously and will alternate from one to the other until CE# pin is

pulled high.

Figure 8.74 Read Product Identification by RDMDID Sequence In QPI Mode (A0=0)

90h

CE#

SCK

IO[3:0]

3-byte Address

Mode 3

Mode 0

23:20

7:4

3:0

7:4

3:0

19:16 15:12 11:8

7:4

3:0

Instruction

Manufacturer

ID (MF7-MF0)

Device ID

(ID7-ID0)

Notes:

1. ADDRESS A0 = 0, will output the 1-byte Manufacturer ID (MF7-MF0) → 1-byte Device ID (ID7-ID0)

ADDRESS A0 = 1, will output the 1-byte Device ID (ID7-ID0) → 1-byte Manufacturer ID (MF7-MF0)

The Manufacturer and Device ID can be read continuously and will alternate from one to the other until CE# pin is

pulled high.

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