TheW25Q32BV (32M-bit) Serial Flash memory provides a storage solution for systems with limitedspace, pins and power. The 25Q series offers flexibility and performance well beyond ordinary SerialFlash devices. They are ideal for code shadowing to RAM, executing code directly from Dual/Quad SPI(XIP) and storing voice, text and data. The device operates on a single 2.7V to 3.6V power supply withcurrent consumption as low as 4mA active and 1?A for power-down. All devices are offered in space-saving packages.
The W25Q32BV array is organized into 16,384 programmable pages of 256-bytes each. Up to 256 bytescan be programmed at a time. Pages can be erased in groups of 16 (4KB sector erase), groups of 128(32KB block erase), groups of 256 (64KB block erase) or the entire chip (chip erase). The W25Q32BVhas 1,024 erasable sectors and 64 erasable blocks respectively. The small 4KB sectors allow for greaterflexibility in applications that require data and parameter storage. (See figure 2.)
TheW25Q32BV supports the standard Serial Peripheral Interface (TI), and a high performanceDual/Quad output as well as Dual/Quad I/O SPI: Serial Clock, Chip Select, Serial Data I/O0 (DI), I/O1(DO), I/O2 (/WP), and I/O3 (/HOLD). SPI clock frequencies of up to 104MHz are supported allowingequivalent clock rates of 208MHz (104MHz x 2) for Dual I/O and 320MHz (80MHz x 4) for Quad I/O whenusing the Fast Read Dual/Quad I/O instructions. These transfer rates can outperform standardAsynchronous 8 and 16-bit Parallel Flash memories. The Continuous Read Mode allows for efficientmemory access with as few as 8-clocks of instruction-overhead to read a 24-bit address, allowing trueXIP (execute in place) operation.
A Hold pin, Write Protect pin and programmable write protection, with top or bottom array control,provide further control flexibility. Additionally, the device supports JEDEC standard manufacturer anddevice identification with a 64-bit Unique Serial Number.
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