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The ACT-F512K8 features hardware sector protection which will disable both program and erase operations to an individual sector or any group of sectors. To activate this mode, the programming equipment must force VID on control pin OE and address pin A9. The sector addresses should be set using higher address lines A18, A17, and A16. The _protection mechanism begins on the falling edge of the WE pulse and is terminated with the rising edge of the same. To verify programming of the protection circuitry, the pro- gramming equipment must force VID on address pin A9 with CE and OE at VIL and WE at VIH. Scanning the sec- tor addresses (A16, A17, and A18) while (A6, A1, AO) = (0, 1, 0,) will produce a logical "1" code at device output DO for a protected sector. Otherwise the device will read