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HY29LV320BT-90 Datasheet(PDF) 3 Page - Hynix Semiconductor |
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HY29LV320BT-90 Datasheet(HTML) 3 Page - Hynix Semiconductor |
3 / 44 page 3 r1.3/May 02 HY29LV320 BLOCK DIAGRAM STATE CONTROL WE# CE# RESET# COMMAND REGISTER A[20:0] V CC DETECTOR TIMER ERASE VOLTAGE GENERATOR AND SECTOR SWITCHES PROGRAM VOLTAGE GENERATOR X-DECODER Y-DECODER 32 Mb FLASH MEMORY ARRAY (67 Sectors) 128-word FLASH Security Sector Y-GATING DATA LATCH I/O BUFFERS I/O CONTROL RY/BY# DQ[15:0] CFI CONTROL CFI DATA MEMORY A[20:0] WP#/ACC OE# able parts may utilize the Secured Sector as bo- nus space, reading and writing like any other Flash sector, or may permanently lock their own code there. The WP#/ACC pin provides two functions. The Write Protect function provides a hardware method of protecting the boot sectors without using a high voltage. The Accelerate function speeds up pro- gramming operations, and is intended primarily to allow faster manufacturing throughput. Two power-saving features are embodied in the HY29LV320. When addresses have been stable for a specified amount of time, the device enters the automatic sleep mode. The host can also place the device into the standby mode. Power con- sumption is greatly reduced in both these modes. Common Flash Memory Interface (CFI) To make Flash memories interchangeable and to encourage adoption of new Flash technologies, major Flash memory suppliers developed a flex- ible method of identifying Flash memory sizes and configurations in which all necessary Flash device parameters are stored directly on the device. Parameters stored include memory size, byte/word configuration, sector configuration, necessary volt- ages and timing information. This allows one set of software drivers to identify and use a variety of different, current and future Flash products. The standard which details the software interface nec- essary to access the device to identify it and to determine its characteristics is the Common Flash Memory Interface (CFI) Specification. The HY29LV320 is fully compliant with this specification. |
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