Specifications

ManualsBrandsCypress Semiconductor ManualsComputer equipmentCY7C1356CV25

CY14C101PA

CY14B101PA

CY14E101PA

Document Number: 001-54392 Rev. *N Page 19 of 44

Device ID

Device ID is a 4-byte read only code identifying a type of product uniquely. This includes the product family code, configuration, and

density of the product.

The device ID is divided into four parts as shown in Table 7:

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 for device is shown in the Ta b le 7 .

3. Density ID (4 bits)

The 4-bit density ID is used as shown in Ta bl e 7 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

manufacturer 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.

Table 7. Device ID

Device

Device ID

(4 bytes)

Device ID Description

31–21

(11 bits)

20–7

(14 bits)

6–3

(4 bits)

2–0

(3 bits)

Manufacturer ID Product ID Density ID Die Rev

CY14C101PA 0x0681C0A0 00000110100 00001110000001 0100 000

CY14B101PA 0x0681C8A0 00000110100 00001110010001 0100 000

CY14E101PA 0x0681D0A0 00000110100 00001110100001 0100 000

Figure 27. RDID Instruction

1 0 0 1 1 1 1 1

SCK

HI-Z

0 1 2 3 4 5 6 7

8 9 10 11 12 13 14 15

24 25 26 27 28 29 30 3116 17 18 19 20 21 22 23

0 1 2 3 4 5 6 7

MSB

4-Byte Device ID

LSB

Byte - 4 Byte - 3 Byte - 2 Byte - 1

Op-Code