25X40BLSIG 查看數據表（PDF） - Winbond

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25X40BLSIG

1M-BIT, 2M-BIT AND 4M-BIT 2.5V SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI

Winbond 

W25X10BL/20BL/40BL

9.2.6 Read Status Register (05h)

The Read Status Register instruction allows the 8-bit Status Register to be read. The instruction is

entered by driving /CS low and shifting the instruction code “05h” into the DIO pin on the rising edge of

CLK. The status register bits are then shifted out on the DO pin at the falling edge of CLK with most

significant bit (MSB) first as shown in figure 7. The Status Register bits are shown in figure 3 and

include the BUSY, WEL, BP2-BP0, TB and SRP bits (see description of the Status Register earlier in

this datasheet).

The Status Register instruction may be used at any time, even while a Program, Erase or Write Status

Register cycle is in progress. This allows the BUSY status bit to be checked to determine when the

cycle is complete and if the device can accept another instruction. The Status Register can be read

continuously, as shown in Figure 7. The instruction is completed by driving /CS high.

Figure 7. Read Status Register Instruction Sequence Diagram

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