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AT45DB321C Datasheet(PDF) 16 Page - ATMEL Corporation |
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AT45DB321C Datasheet(HTML) 16 Page - ATMEL Corporation |
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16 / 40 page  16 3387L–DFLASH–6/06 AT45DB321C The table below details the sector protection status for various scenarios of the WP pin, the Enable Sector Protection command, and the Disable Sector Protection command. 7.4.6 RESET A low state on the reset pin (RESET) will terminate the operation in progress and reset the inter- nal state machine to an idle state. The device will remain in the reset condition as long as a low level is present on the RESET pin. Normal operation can resume once the RESET pin is brought back to a high level. The device incorporates an internal power-on reset circuit, so there are no restrictions on the RESET pin during power-on sequences. The RESET pin is also internally pulled high; therefore, in low pin count applications, connection of the RESET pin is not necessary if this pin and fea- ture will not be utilized. However, it is recommended that the RESET pin be driven high externally whenever possible. 7.4.7 READY/BUSY This open drain output pin will be driven low when the device is busy in an internally self-timed operation. This pin, which is normally in a high state (through an external pull-up resistor), will be pulled low during programming/erase operations, and page-to-buffer transfers. The busy status indicates that the Flash memory array and one of the buffers cannot be accessed; read and write operations to the other buffer can still be performed. During Page Erase and Block Erase, read and write operations can be performed to both buffers. WP 12 3 Time Period WP Pin Enable Sector Protection Command Disable Sector Protection Command Sector Protection Status 1 High High High Command Not Issued Previously Command Issued – x – Command Issued Disabled Enabled Disabled 2 Low x x Enabled 3 High High High Command Issued during Period 1 or 2 – Issue Command Not Issued Yet Command Issued – Enabled Disabled Enabled |
Similar Part No. - AT45DB321C_06 |
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Similar Description - AT45DB321C_06 |
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