FM25V01A Ver la hoja de datos (PDF) - Cypress Semiconductor

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FM25V01A

128-Kbit (16K × 8) Serial (SPI) F-RAM

Cypress Semiconductor 

FM25V01A

Device ID

The FM25V01A 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)

7F7F7F7F7F7FC22108h

71–16

(56 bits)

Manufacturer ID

0111111101111111011111110111

1111011111110111111111000010

Device ID Description

15–13

(3 bits)

12–8

(5 bits)

7–6

(2 bits)

Product ID

Family Density

Sub

001

00001

00

5–3

(3 bits)

Rev

001

2–0

(3 bits)

Rsvd

000

Figure 15. Read Device ID

CS

SCK

SI

0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

Opcode

1 001 11 11

HI-Z

SO

D7 D6 D5 D4 D3 D2 D1 D0

MSB

D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0

LSB

9-Byte Device ID

Document Number: 001-90881 Rev. *E

Page 11 of 22

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