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X25020 Datasheet(PDF) 5 Page - Xicor Inc. |
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X25020 Datasheet(HTML) 5 Page - Xicor Inc. |
5 / 14 page X25020 5 Figure 1. Read E2PROM Array Operation Sequence Operational Notes The X25020 powers-up in the following state: • The device is in the low power standby state. • A HIGH to LOW transition on CS is required to enter an active state and receive an instruction. • SO pin is high impedance. • The “write enable” latch is reset. Figure 2. Read Status Register Operation Sequence Data Protection The following circuitry has been included to prevent inadvertent writes: • The “write enable” latch is reset upon power-up. • A WREN instruction must be issued to set the “write enable” latch. • CS must come HIGH at the proper clock count in order to start a write cycle. 0123456789 10 11 12 13 14 15 16 17 18 19 20 21 22 3834 FHD F04.1 76543210 DATA OUT CS SCK SI SO MSB HIGH IMPEDANCE INSTRUCTION BYTE ADDRESS 76543210 0123456789 10 11 12 13 14 76543210 DATA OUT CS SCK SI SO MSB HIGH IMPEDANCE INSTRUCTION 3834 ILL F13 |
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