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X25F016PE Datasheet(PDF) 2 Page - Xicor Inc. |
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X25F016PE Datasheet(HTML) 2 Page - Xicor Inc. |
2 / 16 page 2 X25F064/032/016/008 Hold ( HOLD) HOLD is used in conjunction with the CS pin to select the device. Once the part is selected and a serial sequence is underway, HOLD may be used to pause the serial communication with the controller without resetting the serial sequence. To pause, HOLD must be brought LOW while SCK is LOW. To resume communication, HOLD is brought HIGH, again while SCK is LOW. If the pause feature is not used, HOLD should be held HIGH at all times. PIN NAMES SYMBOL DESCRIPTION CS Chip Select Input SO Serial Output SI Serial Input SCK Serial Clock Input PP Program Protect Input VSS Ground VCC Supply Voltage HOLD Hold Input NC No Connect 6685 PGM T01.1 PIN DESCRIPTIONS Serial Output (SO) SO is a push-pull serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of the serial clock. Serial Input (SI) SI is the serial data input pin. All opcodes, byte addresses, and data to be written to the memory are input on this pin. Data is latched by the rising edge of the serial clock. Serial Clock (SCK) The Serial Clock controls the serial bus timing for data input and output. Opcodes, addresses, or data present on the SI pin are latched on the rising edge of the clock input, while data on the SO pin change after the falling edge of the clock input. Chip Select ( CS) When CS is HIGH, the X25F064/032/016/008 is deselected and the SO output pin is at high impedance and unless an internal program operation is underway the X25F064/032/016/008 will be in the standby power mode. CS LOW enables the X25F064/032/016/008, placing it in the active power mode. It should be noted that after power-up, a HIGH to LOW transition on CS is required prior to the start of any operation. Program Protect ( PP) When PP is LOW and the nonvolatile bit PPEN is “1”, nonvolatile programming of the X25F064/032/016/008 status register is disabled, but the part otherwise func- tions normally. When PP is held HIGH, all functions, including nonvolatile programming operate normally. PP going LOW while CS is still LOW will interrupt programming of the X25F064/032/016/008 status regis- ter. If the internal program cycle has already been initiated, PP going LOW will have no effect on program- ming. The PP pin function is blocked when the PPEN bit in the status register is “0”. This allows the user to install the X25F064/032/016/008 into a system with PP pin grounded and still be able to program the status register. The PP pin functions will be enabled when the PPEN bit is set “0”. PIN CONFIGURATION 6685 ILL F02.4 CS SO PP VSS 1 2 3 4 8 7 6 5 VCC HOLD SCK SI 8-Lead DIP/SOIC 14-Lead TSSOP 20-Lead TSSOP CS SO NC NC NC PP VSS 1 2 3 4 5 6 7 VCC HOLD NC NC NC SCK SI 14 13 12 11 10 9 8 NC CS NC SO NC NC PP VSS NC NC 1 2 3 4 5 6 7 8 9 10 NC VCC NC HOLD NC NC SCK SI NC NC 20 19 18 17 16 15 14 13 12 11 X25F064/ 032/016/ 008 X25F032/ 016/008 X25F064 |
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