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E28F016SA-070 Datasheet(PDF) 5 Page - Intel Corporation |
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E28F016SA-070 Datasheet(HTML) 5 Page - Intel Corporation |
5 / 55 page E 28F016SA 5 1.0 INTRODUCTION The documentation of the Intel 28F016SA memory device includes this datasheet, a detailed user’s manual, and a number of application notes, all of which are referenced at the end of this datasheet. The datasheet is intended to give an overview of the chip feature-set and of the operating AC/DC specifications. The 16-Mbit Flash Product Family User’s Manual provides complete descriptions of the user modes, system interface examples and detailed descriptions of all principles of operation. It also contains the full list of software algorithm flowcharts, and a brief section on compatibility with Intel 28F008SA. 1.1 Product Overview The 28F016SA is a high-performance 16-Mbit (16,777,216 bit) block erasable nonvolatile random access memory organized as either 1 Mword x 16 or 2 Mbyte x 8. The 28F016SA includes thirty- two 64-KB (65,536) blocks or thirty-two 32-KW (32,768) blocks. A chip memory map is shown in Figure 4. The implementation of a new architecture, with many enhanced features, will improve the device operating characteristics and results in greater product reliability and ease-of-use. Among the significant enhancements on the 28F016SA: • 3.3V Low Power Capability • Improved Program Performance • Dedicated Block Program/Erase Protection A 3/5# input pin reconfigures the device internally for optimized 3.3V or 5.0V read/program operation. The 28F016SA will be available in a 56-lead, 1.2 mm thick, 14 mm x 20 mm TSOP type I package or a 56-lead, 1.8 mm thick, 16 mm x 23.7 mm SSOP package. The TSOP form factor and pinout allow for very high board layout densities. SSOP packaging provides relaxed lead spacing dimensions. A Command User Interface (CUI) serves as the system interface between the microprocessor or microcontroller and the internal memory operation. Internal algorithm automation allows word/byte programs and block erase operations to be executed using a two-write command sequence to the CUI in the same way as the 28F008SA 8-Mbit FlashFile memory. A superset of commands have been added to the basic 28F008SA command-set to achieve higher program performance and provide additional capabilities. These new commands and features include: • Page Buffer Writes to Flash • Command Queueing Capability • Automatic Data Programs during Erase • Software Locking of Memory Blocks • Two-Byte Successive Programs in 8-bit Systems • Erase All Unlocked Blocks Writing of memory data is performed in either byte or word increments typically within 6 µs, a 33% improvement over the 28F008SA. A block erase operation erases one of the 32 blocks in typically 0.6 sec, independent of the other blocks, which is a 65% improvement over the 28F008SA. Each block can be written and erased a minimum of 100,000 cycles. Systems can achieve typically one- million block erase cycles by providing wear-leveling algorithms and graceful block retirement. These techniques have already been employed in many flash file systems. Additionally, wear leveling of block erase cycles can be used to minimize the program/erase performance differences across blocks. The 28F016SA incorporates two Page Buffers of 256 bytes (128 words) each to allow page data writes. This feature can improve a system write performance by up to 4.8 times over previous flash memory devices. All operations are started by a sequence of command writes to the device. Three Status Registers (described in detail later) and a RY/BY# output pin provide information on the progress of the requested operation. While the 28F008SA requires an operation to complete before the next operation can be requested, the 28F016SA allows queueing of the next operation while the memory executes the current operation. This eliminates system overhead |
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