W25Q128FVSIF-TR Datasheet, PDF (66/100 Pages) Winbond – 3V 128M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI

W25Q128FV
8.2.27 Read Manufacturer / Device ID Quad I/O (94h)
The Read Manufacturer / Device ID Quad 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 4x speed.
The Read Manufacturer / Device ID Quad I/O instruction is similar to the Fast Read Quad I/O
instruction. The instruction is initiated by driving the /CS pin low and shifting the instruction code “94h”
followed by a four clock dummy cycles and then a 24-bit address (A23-A0) of 000000h, but with the
capability to input the Address bits four bits per clock. After which, the Manufacturer ID for Winbond
(EFh) and the Device ID are shifted out four bits per clock on the falling edge of CLK with most
significant bit (MSB) first as shown in Figure 41. The Device ID values for the W25Q128FV 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
IO₀
IO₁
IO₂
IO₃
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 (94h)
High Impedance
High Impedance
High Impedance
A23-16
40
A15-8
40
A7-0
(00h)
40
M7-0 Dummy Dummy
40
4
IOs switch from
Input to Output
040
51515151
5151
62626262
6262
73737373
7373
MFR ID Device ID
/CS
CLK
23 24 25 26 27 28 29 30
Mode 3
Mode 0
IO₀
040404040
IO₁
151515151
IO₂
262626262
IO₃
373737373
MFR ID Device ID MFR ID Device ID
(repeat) (repeat) (repeat) (repeat)
Figure 41. Read Manufacturer / Device ID Quad 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 Quad I/O instruction.
- 65 -