SA25F020LMLX 데이터 시트보기 (PDF) - Saifun Semiconductors

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SA25F020LMLX

2Mb Serial Flash with 25MHz SPI Bus Interface

Saifun Semiconductors 

The RDSR command requires the following

sequence:

1. The CSb pin is pulled low to select

the device and the RDSR opcode is

transmitted on the SI pin.

SA25F020 Advanced Information

SAIFUN

19

2. The data on the SI pin becomes

Don't Care.

3. The data from the status register is

shifted out on the SO pins, with the

D7 bit first and the D0 bit last, as

shown in Figure 10.

CS

SCK

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

SI

Status Register Out

Status Register Out

SO

High Impedance

765 4 321 0 7 654 32 1 07

MSB

MSB

MSB

Figure 10. Read Status Register (RDSR) Instruction Sequence

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