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W25X20CLZPIG Datasheet(PDF) 6 Page - Winbond |
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W25X20CLZPIG Datasheet(HTML) 6 Page - Winbond |
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6 / 50 page  W25X20CL Publication Release Date: August 06, 2015 - 6 - Revision F 5.1 Package Types W25X20CL are offered in 8-pin plastic 150-mil width SOIC (package code SN), 150-mil width VSOP8 (package code SV), 8-pad 6x5-mm WSON (package code ZP) and 2x3-mm USON (package code UX). Refer to see figures 1a and 1b, respectively. 5.2 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) 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 “Power-up Timing and Write inhibit threshold ” and Figure 26). If needed, a pull-up resister on /CS can be used to accomplish this. 5.3 Serial Data Input, Output and IOs (DI, DO, IO0 and IO1) The W25X20CL support standard SPI and Dual 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 of CLK. Dual SPI instructions 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. 5.4 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 (TB, BP1 and BP0) bits and Status Register Protect (SRP) bit, a portion or the entire memory array can be hardware protected. The /WP pin is active low. 5.5 HOLD (/HOLD) The Hold (/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. 5.6 Serial Clock (CLK) The SPI Serial Clock Input (CLK) pin provides the timing for serial input and output operations. |
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