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AM29DL800BB120FEB Datasheet(PDF) 10 Page - Advanced Micro Devices |
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AM29DL800BB120FEB Datasheet(HTML) 10 Page - Advanced Micro Devices |
10 / 43 page 10 Am29DL800B P R E L I M I NARY RESET#: Hardware Reset Pin The RESET# pin provides a hardware method of reset- ting the device to reading array data. When the RE- SET# pin is driven low for at least a period of tRP, the device immediately terminates any operation in progress, tristates all output pins, and ignores all read/ write commands for the duration of the RESET# pulse. The device also resets the internal state machine to reading array data. The operation that was interrupted should be reinitiated once the device is ready to accept another command sequence, to ensure data integrity. Current is reduced for the duration of the RESET# pulse. When RESET# is held at VSS±0.3 V, the device draws CMOS standby current (ICC4). If RESET# is held at VIL but not within VSS±0.3 V, the standby current will be greater. The RESET# pin may be tied to the system reset cir- cuitry. A system reset would thus also reset the Flash memory, enabling the system to read the boot-up firmware from the Flash memory. If RESET# is asserted during a program or erase oper- ation, the RY/BY# pin remains a “0” (busy) until the in- ternal reset operation is complete, which requires a time of tREADY (during Embedded Algorithms). The system can thus monitor RY/BY# to determine whether the reset operation is complete. If RESET# is asserted when a program or erase operation is not executing (RY/BY# pin is “1”), the reset operation is completed within a time of tREADY (not during Embedded Algo- rithms). The system can read data tRH after the RE- SET# pin returns to VIH. Refer to the AC Characteristics tables for RESET# pa- rameters and to Figure 14 for the timing diagram. Output Disable Mode When the OE# input is at VIH, output from the device is disabled. The output pins are placed in the high imped- ance state. |
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