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A25L016 Datasheet(PDF) 4 Page - AMIC Technology |
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A25L016 Datasheet(HTML) 4 Page - AMIC Technology |
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4 / 43 page  A25L016 Series (March, 2012, Version 2.0) 3 AMIC Technology Corp. Pin Descriptions Pin No. Description C Serial Clock DIO Serial Data Input 1 DO Serial Data Output 2 S Chip Select W Write Protect HOLD Hold VCC Supply Voltage VSS Ground Notes: 1. The DIO is also used as an output pin when the Fast Read Dual Output instruction and the Fast Read Dual Input-Output instruction are executed. 2. The DO is also used as an input pin when the Fast Read Dual Input-Output instruction. Logic Symbol A25L016 DO DIO S W HOLD V SS V CC C SIGNAL DESCRIPTION Serial Data Output (DO). This output signal is used to transfer data serially out of the device. Data is shifted out on the falling edge of Serial Clock (C). The DO pin is also used as an input pin when the Fast Read Dual Input-Output instruction and Dual Input Fast Program is executed. Serial Data Input (DIO). This input signal is used to transfer data serially into the device. It receives instructions, addresses, and the data to be programmed. Values are latched on the rising edge of Serial Clock (C). The DIO pin is also used as an output pin when the Fast Read Dual Output instruction and the Fast Read Dual Input-Output instruction are executed. Serial Clock (C). This input signal provides the timing of the serial interface. Instructions, addresses, or data present at Serial Data Input (DIO) are latched on the rising edge of Serial Clock (C). Data on Serial Data Output (DO) changes after the falling edge of Serial Clock (C). Chip Select ( S ). When this input signal is High, the device is deselected and Serial Data Output (DO) is at high impedance. Unless an internal Program, Erase or Write Status Register cycle is in progress, the device will be in the Standby mode (this is not the Deep Power-down mode). Driving Chip Select ( S ) Low enables the device, placing it in the active power mode. After Power-up, a falling edge on Chip Select ( S ) is required prior to the start of any instruction. Hold ( HOLD ). The Hold ( HOLD ) signal is used to pause any serial communications with the device without deselecting the device. During the Hold condition, the Serial Data Output (DO) is high impedance, and Serial Data Input (DIO) and Serial Clock (C) are Don’t Care. To start the Hold condition, the device must be selected, with Chip Select ( S ) driven Low. Write Protect ( W ). The main purpose of this input signal is to freeze the size of the area of memory that is protected against program or erase instructions (as specified by the values in the BP2, BP1, and BP0 bits of the Status Register). |
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