W25X20CLUXIG NOR Flash Memory 2Mbit 104MHz 256K x 8 2.3V to 3.6V SPI Flash USON-8

Specifications

Description

The W25X20CL (2M-bit) Serial Flash memories provide a storage solution for systems with limited
space, pins and power. The 25X series offers flexibility and performance well beyond ordinary Serial
Flash devices. They are ideal for code download applications as well as storing voice, text and data.
The devices operate on a single 2.3V to 3.6V power supply with current consumption as low as 1mA
active and 1μA for power-down. All devices are offered in space-saving packages.
The W25X20CL arrays are organized into 1,024 programmable pages of 256-bytes each. Up to 256
bytes can be programmed at a time. The W25X20CL have 64 erasable sectors, 2/4/8 erasable 32KB
blocks and 4 erasable 64KB blocks respectively. The small 4KB sectors allow for greater flexibility in
applications that require data and parameter storage. (See figure 2.)

Status Register Protect (SRP)

The Status Register Protect (SRP) bit is a non-volatile read/write bit in status register (S7) that can be
used in conjunction with the Write Protect (/WP) pin to disable writes to status register. When the SRP
bit is set to a 0 state (factory default) the /WP pin has no control over status register. When the SRP pin
is set to a 1, the Write Status Register instruction is locked out while the /WP pin is low. When the /WP
pin is high the Write Status Register instruction is allowed.

Features

• Family of Serial Flash Memories
– W25X20CL: 2M-bit/256K-byte (262,144)
– 256-bytes per programmable page
– Uniform erasable 4KB, 32KB & 64KB regions.
• SPI with Single / Dual Outputs / I/O
– Standard SPI: CLK, /CS, DI, DO, /WP, /Hold
– Dual SPI: CLK, /CS, IO0, IO1, /WP, /Hold
• Data Transfer up to 208M-bits / second
– Clock operation to 104MHz
– 208MHz equivalent Dual I/O SPI
– Auto-increment Read capability
• Efficient “Continuous Read Mode”
– Low Instruction overhead
– Continuous Read
– As few as 16 clocks to address memory
– Allows true XIP (execute in place) operation

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