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FM25V02A-G データシート(PDF) 11 Page - Cypress Semiconductor

部品番号 FM25V02A-G
部品情報  256-Kbit (32K 횞 8) Serial (SPI) F-RAM
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メーカー  CYPRESS [Cypress Semiconductor]
ホームページ  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

FM25V02A-G データシート(HTML) 11 Page - Cypress Semiconductor

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FM25V02A
Document Number: 001-90865 Rev. *F
Page 11 of 23
Device ID
The FM25V02A device can be interrogated for its manufacturer,
product identification, and die revision. The RDID opcode 9Fh
allows the user to read the manufacturer ID and product ID, both
of
which
are
read-only
bytes.
The
JEDEC-assigned
manufacturer ID places the Cypress (Ramtron) identifier in bank
7; therefore, there are six bytes of the continuation code 7Fh
followed by the single byte C2h. There are two bytes of product
ID, which includes a family code, a density code, a sub code, and
the product revision code.
Table 6. Device ID
Device ID
(9 bytes)
Device ID Description
71–16
(56 bits)
15–13
(3 bits)
12–8
(5 bits)
7–6
(2 bits)
5–3
(3 bits)
2–0
(3 bits)
Manufacturer ID
Product ID
Family
Density
Sub
Rev
Rsvd
7F7F7F7F7F7FC22208h
0111111101111111011111110111
1111011111110111111111000010
001
00010
00
001
000
Figure 16. Read Device ID
CS
SCK
SO
SI
Opcode
01
2
3
456
7
0
7
6
5
4
3
2
1
4445 46
55 5657 58596061 6263 64 65 6667 6869 7071
10
0
1
1
1
1
1
LSB
MSB
HI-Z
47 48 49 50 51 52 53 54
9-Byte Device ID
D7 D6 D5 D4 D3 D2 D1 D0
D3
D1
D7
D2
D0
D5
D3
D1
D4
D2
D7
D5
D3
D6
D4
D6
D0
D1
D7
D5
D0
D6
D3
D1
D2
D0
D2
D4


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