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HY29LV320TT-80I Datasheet(PDF) 2 Page - Hynix Semiconductor |
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HY29LV320TT-80I Datasheet(HTML) 2 Page - Hynix Semiconductor |
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2 / 44 page  2 r1.3/May 02 HY29LV320 GENERAL DESCRIPTION The HY29LV320 is a 32 Mbit, 3 volt-only CMOS Flash memory organized as 2,097,152 (2M) words. The device is available in 48-pin TSOP and 63- ball FBGA packages. Word-wide data (x16) ap- pears on DQ[15:0]. The HY29LV320 can be programmed and erased in-system with a single 3 volt V CC supply. Inter- nally generated and regulated voltages are pro- vided for program and erase operations, so that the device does not require a higher voltage V PP power supply to perform those functions. The de- vice can also be programmed in standard EPROM programmers. Access times as fast as 70ns over the full operating voltage range of 2.7 - 3.6 volts are offered for timing compatibility with the zero wait state requirements of high speed micropro- cessors. To eliminate bus contention, the HY29LV320 has separate chip enable (CE#), write enable (WE#) and output enable (OE#) controls. The device is compatible with the JEDEC single- power-supply Flash command set standard. Com- mands are written to the command register using standard microprocessor write timings, from where they are routed to an internal state-machine that controls the erase and programming circuits. Device programming is performed a word at a time by executing the four-cycle Program Command write sequence. This initiates an internal algorithm that automatically times the program pulse widths and verifies proper cell margin. Faster program- ming times are achieved by placing the HY29LV320 in the Unlock Bypass mode, which requires only two write cycles to program data in- stead of four. The HY29LV320 features a sector architecture and is offered in two versions: n HY29LV320B - a device with boot-sector archi- tecture with the boot sectors at the bottom of the address range, containing one 8KW, two 4KW, one 16KW and sixty-three 32KW sectors. n HY29LV320T - a device with boot-sector archi- tecture with the boot sectors at the top of the address range, containing one 8KW, two 4KW, one 16KW and sixty-three 32KW sectors. The HY29LV320’s sector erase architecture allows any number of array sectors to be erased and re- programmed without affecting the data contents of other sectors. Device erasure is initiated by executing the Erase Command sequence. This initiates an internal algorithm that automatically preprograms the array (if it is not already pro- grammed) before executing the erase operation. As during programming cycles, the device auto- matically times the erase pulse widths and veri- fies proper cell margin. Sectors are arranged into designated groups for purposes of protection and unprotection. Sector Group Protection optionally disables both program and erase operations in any combination of the sector groups of the memory array, while Temporary Sector Group Unprotect allows in-system erasure and code changes in previously protected sector groups. Erase Sus- pend enables the user to put erase on hold for any period of time to read data from, or program data to, any sector that is not selected for era- sure. True background erase can thus be achieved. The device is fully erased when shipped from the factory. Addresses and data needed for the programming and erase operations are internally latched during write cycles, and the host system can detect completion of a program or erase operation by observing the RY/BY# pin, or by reading the DQ[7] (Data# Polling) and DQ[6] (Toggle) status bits. Hardware data protection measures include a low V CC detector that automatically inhibits write op- erations during power transitions. After a program or erase cycle has been com- pleted, or after assertion of the RESET# pin (which terminates any operation in progress), the device is ready to read data or to accept another com- mand. Reading data out of the device is similar to reading from other Flash or EPROM devices. The Secured Sector is an extra 128 word 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 8-word ESN (Elec- tronic Serial Number), customer code pro- grammed at the factory, or both. Customer Lock- |
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