S25FL256SDPMFVC03 View Datasheet(PDF) - Cypress Semiconductor

Part Name

Description

Manufacturer

S25FL256SDPMFVC03

128 Mbit (16 Mbyte), 256 Mbit (32 Mbyte) 3.0V SPI Flash Memory

Cypress Semiconductor 

S25FL128S, S25FL256S

9.2 Identification Commands

9.2.1

Read Identification - REMS (Read_ID or REMS 90h)

The READ_ID command identifies the Device Manufacturer ID and the Device ID. The command is also referred to as Read

Electronic Manufacturer and device Signature (REMS). READ-ID (REMS) is only supported for backward compatibility and should

not be used for new software designs. New software designs should instead make use of the RDID command.

The command is initiated by shifting on SI the instruction code “90h” followed by a 24-bit address of 00000h. Following this, the

Manufacturer ID and the Device ID are shifted out on SO starting at the falling edge of SCK after address. The Manufacturer ID and

the Device ID are always shifted out with the MSB first. If the 24-bit address is set to 000001h, then the Device ID is read out first

followed by the Manufacturer ID. The Manufacturer ID and Device ID output data toggles between address 000000H and 000001H

until terminated by a low to high transition on CS# input. The maximum clock frequency for the READ_ID command is

133 MHz.

Figure 9.1 READ_ID Command Sequence

CS#

SCK

SI

SO

0 1 2 3 4 5 6 7 8 9 10 28 29 30 31

Instruction

90h

High Impedance

ADD (1)

23 22 21

MSB

32 1 0

CS #

SCK

32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

SI

Manufacture ID

Device ID

SO

7 6 5 4 3 2 1 0 7 6 5 4 3 2 10

MSB

MSB

Table 9.3 Read_ID Values

Device

S25FL128S

S25FL256S

Manufacturer ID (hex)

01

01

Device ID (hex)

17

18

Document Number: 001-98283 Rev. *I

Page 70 of 144

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