W25Q256FVBIF-TR Datasheet, PDF (77/108 Pages) Winbond – 3V 256M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI

W25Q256FV
8.2.36 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
24/32-bit address (A23/A31-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 W25Q256FV are listed in Manufacturer and Device Identification table. 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
Mode 3
Mode 0
DI
(IO₀)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Instruction (92h)
A23-16
A15-8
A7-0 (00h)
M7-0
6420642064206420
DO
(IO₁)
* ^{= MSB}
High Impedance
7531753175317531
*
*
*
*
/CS
CLK
DI
(IO₀)
DO
(IO₁)
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
IOs switch from
Input to Output
06420642064206420
17531753175317531
* MFR ID
* Device ID
* MFR ID
(repeat)
* Device ID
(repeat)
Mode 3
Mode 0
Note:
Figure 40. Read Manufacturer / Device ID Dual I/O Instruction (SPI Mode only)
32-Bit Address is required when the device is operating in 4-Byte Address Mode
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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Publication Release Date: February 11, 2015
Preliminary – Revision H