Electronic Components Datasheet Search |
|
HY29DS162BF-13 Datasheet(PDF) 6 Page - Hynix Semiconductor |
|
HY29DS162BF-13 Datasheet(HTML) 6 Page - Hynix Semiconductor |
6 / 48 page 6 HY29DS162/HY29DS163 r1.3/Apr 01 CONVENTIONS Unless otherwise noted, a positive logic (active High) convention is assumed throughout this docu- ment, whereby the presence at a pin of a higher, more positive voltage (V IH) causes assertion of the signal. A ‘#’ symbol following the signal name, e.g., RESET#, indicates that the signal is asserted in the Low state (V IL). See DC specifications for V IH and VIL values. Whenever a signal is separated into numbered bits, e.g., DQ[7], DQ[6], ..., DQ[0], the family of bits may also be shown collectively, e.g., as DQ[7:0]. The designation 0xNNNN (N = 0, 1, 2, . . . , 9, A, . . . , E, F) indicates a number expressed in hexadeci- mal notation. The designation 0bXXXX indicates a number expressed in binary notation (X = 0, 1). MEMORY ARRAY ORGANIZATION The 16 Mbit Flash memory array is organized into 39 blocks called sectors (S0, S1, . . . , S38). A sector or several contiguous sectors are defined as a sector group. A sector is the smallest unit that can be erased and a sector group is the small- est unit that can be protected to prevent acciden- tal or unauthorized erasure. Sectors are also combined into two ‘super’ groups designated as banks. In the HY29DS16x, eight of the sectors, which comprise the boot block, are sized at eight Kbytes (four Kwords), while the remaining 31 sectors are sized at 64 Kbytes (32 Kwords). The boot block can be located at the bottom of the address range (HY29DS16xB) or at the top of the address range (HY29DS16xT). Tables 1 and 2 define the sector addresses and corresponding array address ranges for the top and bottom boot block versions of the HY29DS16x. Table 3 specifies the bank organizations and cor- responding bank addresses. See Tables 7 and 8 for sector group definitions. Secured Sector Flash Memory Region The Secured Sector (Sec2) feature provides a 64 Kbyte (32 Kword) Flash memory region that en- ables permanent part identification through an Electronic Serial Number (ESN). An associated ‘Sec2 Indicator’ bit, which is permanently set at the factory and cannot be changed, indicates whether or not the Sec2 is locked when shipped from the factory. The device is offered with the Sec2 either factory locked or customer lockable. The factory-locked version is always protected when shipped from the factory, and has the Sec2 Indicator bit perma- nently set to a ‘1’. The customer-lockable version is shipped with the Sec2 unprotected, allowing customers to utilize the sector in any manner they choose, and has the Sec2 Indicator bit permanently set to a ‘0’. Thus, the Sec2 Indicator bit prevents customer-lockable devices from being used to re- place devices that are factory locked. The bit pre- vents cloning of a factory locked part and thus ensures the security of the ESN once the product is shipped to the field. The system accesses the Sec2 through a com- mand sequence (see “Enter/Exit Secured Sector Command Sequence”). After the system has writ- ten the Enter Secured Sector command sequence, it may read the Sec2 by using the addresses nor- mally occupied by the boot sectors, as specified in Table 4. This mode of operation continues until the system issues the Exit Secured Sector com- mand sequence, or until power is removed from the device. On power-up, or following a hardware reset, the device reverts to addressing the boot sectors. Sec2 Programmed and Protected At the Factory In a factory-locked device, the Sec2 is protected when the device is shipped from the factory and cannot be modified in any way. The device is avail- able preprogrammed with one of the following: n A random, secure ESN only n Customer code n Both a random, secure ESN and customer code In devices that have an ESN, it will be located at the bottom of the lowest 8 Kbyte boot sector: start- ing at byte address 0x000000 and ending at 0x00000F for a Bottom Boot device, and starting at byte address 0x1F0000 and ending at 0x1F000F for a Top Boot device. |
Similar Part No. - HY29DS162BF-13 |
|
Similar Description - HY29DS162BF-13 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |