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HY29DL163BF-90 Datasheet(PDF) 3 Page - Hynix Semiconductor |
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HY29DL163BF-90 Datasheet(HTML) 3 Page - Hynix Semiconductor |
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3 / 48 page  3 r1.3/June 01 HY29DL162/HY29DL163 BLOCK DIAGRAM STATE CONTROL WE# CE# RESET# BYTE# COMMAND REGISTER A[19:0], A[-1] V CC DETECTOR TIMER ERASE VOLTAGE GENERATOR AND SECTOR SWITCHES PROGRAM VOLTAGE GENERATOR X-DECODER Y-DECODER 16 Mb FLASH MEMORY ARRAY (2 Banks, 39 Sectors) 0.5 Mb FLASH Security Sector Y-GATING DATA LATCH I/O BUFFERS I/O CONTROL RY/BY# DQ[15:0] CFI CONTROL CFI DATA MEMORY A[19:0], A[-1] WP#/ACC OE# mand. Reading data out of the device is similar to reading from other Flash or EPROM devices. The Secured Sector is an extra 64 Kbyte sector capable of being permanently locked at the fac- tory or by customers. The Secured Indicator Bit (accessed via the Electronic ID mode) is perma- nently set to a 1 if the part is factory locked, and permanently set to a 0 if customer lockable. This way, customer lockable parts can never be used to replace a factory locked part. Factory locked parts provide several options. The Secured Sec- tor may store a secure, random 16-byte ESN (Elec- tronic Serial Number), customer code programmed at the factory, or both. Customer Lockable parts may utilize the Secured Sector as bonus space, reading and writing like any other Flash sector, or may permanently lock their own code there. The WP#/ACC pin provides access to two func- tions. The Write Protect function provides a hard- ware method of protecting certain boot sectors without using a high voltage. The Accelerate func- tion speeds up programming operations, and is intended primarily to allow faster manufacturing throughput. Two power-saving features are embodied in the HY29DL16x. 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 HY29DL16x is fully compliant with this specification. |
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