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EN29SL800T-90BCP Datasheet(PDF) 9 Page - Eon Silicon Solution Inc. |
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EN29SL800T-90BCP Datasheet(HTML) 9 Page - Eon Silicon Solution Inc. |
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9 / 43 page  This Data Sheet may be revised by subsequent versions ©2004 Eon Silicon Solution, Inc., www.essi.com.tw or modifications due to changes in technical specifications. 9 EN29SL800 Rev. D, Issue Date: 2006/11/06 USER MODE DEFINITIONS Word / Byte Configuration The signal set on the BYTE# Pin controls whether the device data I/O pins DQ15-DQ0 operate in the byte or word configuration. When the Byte# Pin is set at logic ‘1’, then the device is in word configuration, DQ15-DQ0 are active and are controlled by CE# and OE#. On the other hand, if the Byte# Pin is set at logic ‘0’, then the device is in byte configuration, and only data I/O pins DQ0-DQ7 are active and controlled by CE# and OE#. The data I/O pins DQ8- DQ14 are tri-stated, and the DQ15 pin is used as an input for the LSB (A-1) address function. Standby Mode The EN29SL800 has a CMOS-compatible standby mode, which reduces the current to < 0.2µA (typical). It is placed in CMOS-compatible standby when the CE# pin is at VCC ± 0.2. RESET# and BYTE# pin must also be at CMOS input levels. If CE# and RESET# are held at VIH, but not within VCC ± 0.2V, the device will be in the standby modes,but the standby current will be greater.The outputs are in a high-impedance state independent of the OE# input. Read Mode The device is automatically set to reading array data after device power-up. No commands are required to retrieve data. The device is also ready to read array data after completing an Embedded Program or Embedded Erase algorithm. After the device accepts an Erase Suspend command, the device enters the Erase Suspend mode. The system can read array data using the standard read timings, except that if it reads at an address within erase-suspended sectors, the device outputs status data. After completing a programming operation in the Erase Suspend mode, the system may once again read array data with the same exception. See “Erase Suspend/Erase Resume Commands” for more additional information. The system must issue the reset command to re-enable the device for reading array data if DQ5 goes high, or while in the autoselect mode. See the “Reset Command” additional details. Output Disable Mode When the OE# pin is at a logic high level (VIH), the output from the EN29SL800 is disabled. The output pins are placed in a high impedance state. Auto Select Identification Mode The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on DQ15–DQ0. This mode is primarily intended for programming equipment to automatically match a device to be programmed with its corresponding programming algorithm. However, the autoselect codes can also be accessed in-system through the command register. When using programming equipment, the autoselect mode requires VID ( 9.0 V to 11.0 V) on address pin A9. Address pins A8, A6, A1, and A0 must be as shown in Autoselect Codes table. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits. Refer to the corresponding Sector Address Tables. The Command Definitions table shows the remaining address bits that are don’t-care. When all necessary bits have been set as required, the programming equipment may then read the corresponding identifier code on DQ15–DQ0. |
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