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The 25032BVSIG (32M-bit) Serial Flash Memory provides a storage solution for systems with limited space, pins and power. The W25Q32BV (32M-bit) Serial Flash memory provides a storage solution for systems with limited space, pins and power. The 25Q series offers flexibility and performance well beyond ordinary Serial Flash 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 with current consumption as low as 4mA active and 1μA for power-down. All devices are offered in space-saving packages.
1. Highest Performance Serial Flash
– 104MHz Dual SPI / 80MHz Quad SPI clocks
– 208/320MHz equivalent Dual/Quad SPI
– 40MB/S continuous data transfer rate
– Up to 8X that of ordinary Serial Flash
– More than 100,000 erase/program cycles
– More than 20-year data retention
2. Advanced Security Features
– Software and Hardware Write-Protect
– Top/Bottom, 4KB complement array protection
– Power Supply Lock-Down and OTP protection
– 64-Bit Unique ID for each device
– Discoverable Parameters (SFDP) Register
– 3X256-Byte Security Registers with OTP locks
– Volatile & Non-volatile Status Register Bits
Chip Select (/CS)
The SPI Chip Select (/CS) pin enables and disables device operation. When /CS is high the device is deselected and the Serial Data Output (DO, or IO0, IO1, IO2, IO3) pins are at high impedance. When deselected, the devices power consumption will be at standby levels unless an internal erase, program or write status register cycle is in progress. When /CS is brought low the device will be selected, power consumption will increase to active levels and instructions can be written to and data read from the device.
After power-up, /CS must transition from high to low before a new instruction will be accepted. The /CS input must track the VCC supply level at power-up (see “Write Protection” and figure 38). If needed a pullup resister on /CS can be used to accomplish this.