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W25Q16BVSSIP Datasheet(PDF) 9 Page - Winbond |
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W25Q16BVSSIP Datasheet(HTML) 9 Page - Winbond |
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9 / 68 page  W25Q16BV Publication Release Date: July 08, 2010 - 9 - Revision F 8.1 Package Types W25Q16BV is offered in an 8-pin plastic 150-mil or 208-mil width SOIC (package code SN & SS) and 6x5-mm WSON (package code ZP) as shown in figure 1a, and 1b, respectively. The 300-mil 8-pin PDIP is another option of package selections (Figure 1c). The W25Q16BV is also offered in a 16-pin plastic 300-mil width SOIC (package code SF) as shown in figure 1d. Package diagrams and dimensions are illustrated at the end of this datasheet. 8.2 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 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 32). If needed a pull-up resister on /CS can be used to accomplish this. 8.3 Serial Data Input, Output and IOs (DI, DO and IO0, IO1, IO2, IO3) The W25Q16BV supports standard SPI, Dual SPI and Quad SPI operation. Standard SPI instructions use the unidirectional DI (input) pin to serially write instructions, addresses or data to the device on the rising edge of the Serial Clock (CLK) input pin. Standard SPI also uses the unidirectional DO (output) to read data or status from the device on the falling edge CLK. Dual and Quad SPI instruction use the bidirectional IO pins to serially write instructions, addresses or data to the device on the rising edge of CLK and read data or status from the device on the falling edge of CLK. Quad SPI instructions require the non-volatile Quad Enable bit (QE) in Status Register-2 to be set. When QE=1 the /WP pin becomes IO2 and /HOLD pin becomes IO3. 8.4 Write Protect (/WP) The Write Protect (/WP) pin can be used to prevent the Status Register from being written. Used in conjunction with the Status Register’s Block Protect (SEC, TB, BP2, BP1 and BP0) bits and Status Register Protect (SRP) bits, a portion or the entire memory array can be hardware protected. The /WP pin is active low. When the QE bit of Status Register-2 is set for Quad I/O, the /WP pin (Hardware Write Protect) function is not available since this pin is used for IO2. See figure 1a, 1b, 1c, and 1d for the pin configuration of Quad I/O operation. 8.5 HOLD (/HOLD) The /HOLD pin allows the device to be paused while it is actively selected. When /HOLD is brought low, while /CS is low, the DO pin will be at high impedance and signals on the DI and CLK pins will be ignored (don’t care). When /HOLD is brought high, device operation can resume. The /HOLD function can be useful when multiple devices are sharing the same SPI signals. The /HOLD pin is active low. When the QE bit of Status Register-2 is set for Quad I/O, the /HOLD pin function is not available since this pin is used for IO3. See figure 1a-d for the pin configuration of Quad I/O operation. 8.6 Serial Clock (CLK) The SPI Serial Clock Input (CLK) pin provides the timing for serial input and output operations. ("See SPI Operations") |
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