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

Figure 9.3 Read Electronic Signature (RES) Command Sequence

CS#

SCK

SI

SO

0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 39

Instruction

High Impedance

3 Dummy

Bytes

23 22 21

MSB

32 1 0

Electonic ID

76543210

MSB

Table 9.4 RES Values

Device

S25FL128S

S25FL256S

Device ID (hex)

17

18

9.3 Register Access Commands

9.3.1

Read Status Register-1 (RDSR1 05h)

The Read Status Register-1 (RDSR1) command allows the Status Register-1 contents to be read from SO. The Status Register-1

contents may be read at any time, even while a program, erase, or write operation is in progress. It is possible to read the Status

Register-1 continuously by providing multiples of eight clock cycles. The status is updated for each eight cycle read. The maximum

clock frequency for the RDSR1 (05h) command is 133 MHz.

Figure 9.4 Read Status Register-1 (RDSR1) Command Sequence

CS #

SCK

SI

SO

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Instruction

High Impedance

Status Register-1 Out

7654321

MSB

Status Register-1 Out

0 765432 1

MSB

07

MSB

Document Number: 001-98283 Rev. *I

Page 72 of 144

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