W25Q64DWSFIG WINBOND [Winbond], W25Q64DWSFIG Datasheet - Page 57

• Manufacturer Part Number: W25Q64DWSFIG
• Description: 1.8V 64M-BIT SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI
• Manufacturer: WINBOND [Winbond]

10.2.32 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 31. The Device ID values for the W25Q64DW is 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.
CLK
CLK
/CS
/CS
IO
IO
IO
IO
IO
IO
IO
IO
Note:
The “Continuous Read Mode” bits M(7-0) must be set to Fxh to be compatible with Fast Read Quad I/O instruction.
0
1
2
3
0
1
2
3
Mode 3
Mode 0
0
1
2
3
23
MFR ID
(repeat)
4
5
6
7
24
0
1
2
3
25
0
Device ID
(repeat)
4
5
6
7
26
1
Figure 31. Read Manufacturer / Device ID Quad I/O Instruction (SPI Mode only)
0
1
2
3
27
Instruction (94h)
High Impedance
High Impedance
High Impedance
2
(repeat)
MFR ID
4
5
6
7
28
3
0
1
2
3
29
4
Device ID
(repeat)
4
5
6
7
30
5
0
1
2
3
6
Mode 3
Mode 0
7
A23-16
4
5
6
7
8
0
1
2
3
9
- 57 -
4
5
6
7
A15-8
10
0
1
2
3
11
4
5
6
7
12
(00h)
A7-0
0
1
2
3
13
Publication Release Date: January 13, 2011
4
5
6
7
14
M7-0
0
1
2
3
15
Dummy
16
17
Dummy
18
Preliminary - Revision C
W25Q64DW
19
MFR ID
4
5
6
7
20
0
1
2
3
21
Device ID
IOs switch from
Input to Output
4
5
6
7
22
0
1
2
3
23