w25x10bl Winbond Electronics Corp America, w25x10bl Datasheet - Page 14

• Manufacturer Part Number: w25x10bl
• Description: 1m-bit, 2m-bit And 4m-bit 2.5v Serial Flash Memory With 4kb Sectors And Dual I/o Spi
• Manufacturer: Winbond Electronics Corp America

9.2
The instruction set of the W25X10BL/20BL/40BL consists of nineteen basic instructions that are fully
controlled through the SPI bus (see Instruction Set table). Instructions are initiated with the falling edge
of Chip Select (/CS). The first byte of data clocked into the DIO input provides the instruction code.
Data on the DIO input is sampled on the rising edge of clock with most significant bit (MSB) first.
Instructions vary in length from a single byte to several bytes and may be followed by address bytes,
data bytes, dummy bytes (don’t care), and in some cases, a combination. Instructions are completed
with the rising edge of edge /CS. Clock relative timing diagrams for each instruction are included in
figures 4 through 25. All read instructions can be completed after any clocked bit. However, all
instructions that Write, Program or Erase must complete on a byte boundary (CS driven high after a full
8-bits have been clocked) otherwise the instruction will be terminated. This feature further protects the
device from inadvertent writes. Additionally, while the memory is being programmed or erased, or when
the Status Register is being written, all instructions except for Read Status Register will be ignored until
the program or erase cycle has completed.
9.2.1
MANUFACTURER ID
Winbond Serial Flash
Device ID
Instruction
W25X10BL
W25X20BL
W25X40BL
INSTRUCTIONS
Manufacturer and Device Identification
(M7-M0)
EFh
(ID7-ID0)
ABh, 90h, 92h
10h
11h
12h
- 14 -
W25X10BL/20BL/40BL
(ID15-ID0)
9Fh
3011h
3012h
3013h