参数资料
型号: W25Q64FVSFIG
厂商: Winbond Electronics
文件页数: 12/89页
文件大小: 0K
描述: IC SPI FLASH 64MBIT 16SOIC
标准包装: 44
系列: SpiFlash®
格式 - 存储器: 闪存
存储器类型: FLASH
存储容量: 64M(8M x 8)
速度: 80MHz
接口: SPI 串行
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 85°C
封装/外壳: 16-SOIC(0.295",7.50mm 宽)
供应商设备封装: 16-SOIC
包装: 管件
W25Q64FV
5.
FUNCTIONAL DESCRIPTIONS
5.1 SPI/QPI OPERATIONS
Power On
Reset (66h + 99h)
Device
Initialization
Standard SPI
Dual SPI
Reset (66h + 99h)
Enable QPI (38h)
QPI
Quad SPI
Disable QPI (FFh)
operations
operations
Figure 3. W25Q64FV Serial Flash Memory Operation Diagram
5.1.1
Standard SPI Instructions
The W25Q64FV is accessed through an SPI compatible bus consisting of four signals: Serial Clock (CLK),
Chip Select (/CS), Serial Data Input (DI) and Serial Data Output (DO). Standard SPI instructions use the
DI input pin to serially write instructions, addresses or data to the device on the rising edge of CLK. The
DO output pin is used to read data or status from the device on the falling edge of CLK.
SPI bus operation Mode 0 (0,0) and 3 (1,1) are supported. The primary difference between Mode 0 and
Mode 3 concerns the normal state of the CLK signal when the SPI bus master is in standby and data is
not being transferred to the Serial Flash. For Mode 0, the CLK signal is normally low on the falling and
rising edges of /CS. For Mode 3, the CLK signal is normally high on the falling and rising edges of /CS.
5.1.2
Dual SPI Instructions
The W25Q64FV supports Dual SPI operation when using instructions such as “ Fast Read Dual Output
(3Bh)” and “Fast Read Dual I/O (BBh) ” . These instructions allow data to be transferred to or from the
device at two to three times the rate of ordinary Serial Flash devices. The Dual SPI Read instructions are
ideal for quickly downloading code to RAM upon power-up (code-shadowing) or for executing non-speed-
critical code directly from the SPI bus (XIP). When using Dual SPI instructions, the DI and DO pins
become bidirectional I/O pins: IO0 and IO1.
- 12 -
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