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AT25QL641 bảng dữ liệu(PDF) 52 Page - Renesas Technology Corp

tên linh kiện AT25QL641
Giải thích chi tiết về linh kiện  SPI Serial Flash Memory with Dual I/O, Quad I/O, QPI Support
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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AT25QL641 bảng dữ liệu(HTML) 52 Page - Renesas Technology Corp

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DS-AT25QL641-130 Rev. G
Page 52
Sep 14, 2022
© 2022 Renesas Electronics
AT25QL641 Datasheet
8.28 JEDEC ID (9Fh)
For compatibility reasons, the AT25QL641 provides several commands to electronically determine the identity of
the device. The Read JEDEC ID command is compliant with the JEDEC standard for SPI compatible serial Flash
memories that was adopted in 2003.
The command is entered by driving the CS pin low with following the command code 9Fh. The JEDEC assigned
Manufacturer ID byte for Renesas Electronics (1Fh) and two Device ID bytes, Memory Type (ID15-ID8) and
Capacity (ID7-ID0) are then shifted out on the falling edge of SCK with most significant bit (MSB) first shown in
Figure 49 and Figure 50. For memory type and capacity values, see Table 7. The JEDEC ID can be read
continuously. The command is terminated by driving CS high.
Figure 49. Read JEDEC ID Command (SPI Mode)
Figure 50. Read JEDEC ID Command (QPI Mode)
SCK
CS
1
02
3
4
6
579
810
11
14
15
12
13
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
HIGH-IMPEDANCE
Command
9Fh
SCK
CS
Manufacturer ID
Memory Type ID15-ID8
Capacity ID7-ID0
76
5
4
32
1
76
5
4
32
1
0
76
5
4
32
1
0
0
MSB
MSB
MSB
SI
SO
SI
SO
SCK
CS
1
0
2345
Mode 3
Command
9Fh
MFR ID
MT ID
Capacity ID
Mode 0
0
4
2
3
7
6
1
5
0
4
2
3
7
6
1
5
0
4
2
3
7
6
1
5
67
Mode 3
Mode 0
MSB
MSB
MSB
IOs switch from Input to Output
IO
0
IO
1
IO
2
IO
3



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