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CY14B101Q1A

1-Mbit (128 K × 8) Serial (SPI) nvSRAM

Cypress Semiconductor

CY14B101Q1A Datasheet PDF : 34 Pages

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CY14C101Q

CY14B101Q, CY14E101Q

Device ID

Device ID is 4-byte read only code identifying a type of product

uniquely. This includes the product family code, configuration

and density of the product.

Table 8. Device ID

Bits

#of Bits

Device

CY14C101Q1A

CY14C101Q2A

CY14C101Q3A

CY14B101Q1A

CY14B101Q2A

CY14B101Q3A

CY14E101Q1A

CY14E101Q2A

CY14E101Q3A

31 - 21

(11 bits)

Manufacture ID

00000110100

20 - 7

(14 bits)

Product ID

00001000000001

00001100000000

00001100000001

00001000010001

00001100010000

00001100010001

00001000100001

00001100100000

00001100100001

6- 3

(4 bits)

Density ID

0100

2-0

(3 bits)

Die Rev

000

The device ID is divided into four parts as shown in Table 8:

1. Manufacturer ID (11 bits)

This is the JEDEC assigned manufacturer ID for Cypress.

JEDEC assigns the manufacturer ID in different banks. The first

three bits of the manufacturer ID represent the bank in which ID

is assigned. The next eight bits represent the manufacturer ID.

Cypress’s manufacturer ID is 0x34 in bank 0. Therefore the

manufacturer ID for all Cypress nvSRAM products is:

Cypress ID - 000_0011_0100

2. Product ID (14 bits)

The product ID is defined as shown in the Table 8

3. Density ID (4 bits)

The 4 bit density ID is used as shown in Table 8 for indicating the

1Mb density of the product.

4. Die Rev (3 bits)

This is used to represent any major change in the design of the

product. The initial setting of this is always 0x0.

RDID (Device ID Read) Instruction

This instruction is used to read the JEDEC assigned manufac-

turer ID and product ID of the device at SPI frequency upto

40 MHz. This instruction can be used to identify a device on the

bus. RDID instruction can be issued by shifting the op-code for

RDID in through the SI pin of nvSRAM after CS goes LOW. This

is followed by nvSRAM shifting out the four bytes of device ID

through the SO pin.

Figure 26. RDID instruction

0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

SCK

Op-Code

1001111 1

Byte - 4

Byte - 3

Byte - 2

Byte - 1

HI-Z

D7 D6 D5 D4 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

MSB

LSB

4-Byte Device ID

Document #: 001-54393 Rev. *F

Page 18 of 34

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