W25Q128FVCIP datasheet(63/97 Pages) WINBOND

63 / 97 page

W25Q128FV

Publication Release Date: October 01, 2012

- 62 -

Revision D

8.2.26 Read Manufacturer / Device ID Dual I/O (92h)

The Read Manufacturer / Device ID Dual I/O instruction is an alternative to the Read Manufacturer /

Device ID instruction that provides both the JEDEC assigned manufacturer ID and the specific device ID

at 2x speed.

The Read Manufacturer / Device ID Dual I/O instruction is similar to the Fast Read Dual I/O instruction.

The instruction is initiated by driving the /CS pin low and shifting the instruction code “92h” followed by a

24-bit address (A23-A0) of 000000h, but with the capability to input the Address bits two bits per clock.

After which, the Manufacturer ID for Winbond (EFh) and the Device ID are shifted out 2 bits per clock on

the falling edge of CLK with most significant bits (MSB) first as shown in Figure 40. The Device ID values

for the W25Q128FV are listed in Manufacturer and Device Identification table. If the 24-bit address is

initially set to 000001h the Device ID will be read first and then followed by the Manufacturer ID. The

Manufacturer and Device IDs can be read continuously, alternating from one to the other. The instruction

is completed by driving /CS high.

/CS

CLK

(IO

Mode 0

Mode 3

Instruction (92h)

High Impedance

A23-16

A15-8

A7-0 (00h)

M7-0

/CS

CLK

(IO

Mode 0

Mode 3

MFR ID

Device ID

MFR ID

(repeat)

Device ID

IOs switch from

Input to Output

(repeat)

= MSB

Figure 40. Read Manufacturer / Device ID Dual I/O Instruction (SPI Mode only)

Note:

The “Continuous Read Mode” bits M(7-0) must be set to Fxh to be compatible with Fast Read Dual I/O instruction.

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