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AT49BV008A-20CI Datasheet(PDF) 1 Page - ATMEL Corporation |
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AT49BV008A-20CI Datasheet(HTML) 1 Page - ATMEL Corporation |
1 / 16 page 1 Features • 2.7V to 3.6V Read/Write Operation • Fast Read Access Time - 120 ns • Internal Erase/Program Control • Sector Architecture – One 8K Words (16K bytes) Boot Block with Programming Lockout – Two 4K Words (8K bytes) Parameter Blocks – One 496K Words (992K bytes) Main Memory Array Block • Fast Sector Erase Time - 10 seconds • Byte-by-Byte or Word-By-Word Programming - 30 µµµµs Typical • Hardware Data Protection • DATA Polling For End Of Program Detection • Low-Power Dissipation – 25 mA Active Current –50 µµµµA CMOS Standby Current • Typical 10,000 Write Cycles Description The AT49BV008A(T) and AT49BV8192A(T) are 3-volt, 8-megabit Flash Memories organized as 1,048,576 words of 8 bits each or 512K words of 16 bits each. Manufac- tured with Atmel’s advanced nonvolatile CMOS technology, the devices offer access times to 120 ns with power dissipation of just 67 mW at 2.7V read. When deselected, the CMOS standby current is less than 50 µA. The device contains a user-enabled “boot block” protection feature. Two versions of the feature are available: the AT49BV008A/8192A locates the boot block at lowest order addresses (“bottom boot”); the AT49BV008AT/8192AT locates it at highest order addresses (“top boot”). To allow for simple in-system reprogrammability, the AT49BV008A(T)/8192A(T) does not require high input voltages for programming. Reading data out of the device is similar to reading from an EPROM; it has standard CE, OE, and WE inputs to avoid bus contention. Reprogramming the AT49BV008A(T)/8192A(T) is performed by first erasing a block of data and then programming on a byte-by-byte or word-by-word basis. 8-Megabit (1M x 8/ 512K x 16) CMOS Flash Memory AT49BV008A AT49BV008AT AT49BV8192A AT49BV8192AT Preliminary Rev. 1049C–09/98 Pin Configurations Pin Name Function A0 - A18 Addresses CE Chip Enable OE Output Enable WE Write Enable RESET Reset RDY/BUSY Ready/Busy Output VPP Optional Power Supply for Faster Program/Erase Operations I/O0 - I/O14 Data Inputs/Outputs I/O15 (A-1) I/O15 (Data Input/Output, Word Mode) A-1 (LSB Address Input, Byte Mode) BYTE Selects Byte or Word Mode NC No Connect (continued) |
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