HY29LV320BT-12 datasheet(6/44 Pages) HYNIX

Part #	HY29LV320BT-12

Description	32 Mbit (2M x 16) Low Voltage Flash Memory

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Manufacturer	HYNIX [Hynix Semiconductor]

Direct Link	http://www.skhynix.com/kor/main.do

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6

r1.3/May 02

HY29LV320

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 32 Mbit Flash memory array is organized into

67 blocks called sectors (S0, S1, . . . , S66). 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.

In the HY29LV320, four of the sectors, which com-

prise the boot block, are sized as follows: one of

eight Kwords, two of four Kwords and one of

sixteen Kwords. The remaining 63 sectors are

sized at 32 Kwords. The boot block can be lo-

cated at the bottom of the address range

(HY29LV320B) or at the top of the address range

(HY29LV320T).

Tables 1 and 2 define the sector addresses and

corresponding array address ranges for the top

and bottom boot block versions of the HY29LV320.

See Tables 6 and 7 for sector group definitions.

Secured Sector Flash Memory Region

The Secured Sector (Sec2) feature provides a 128

word Flash memory region that enables perma-

nent part identification through an Electronic Se-

rial Number (ESN). An associated ‘Sec2 Indica-

tor’ 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 speci-

fied in Table 3. This mode of operation continues

until the system issues the Exit Secured Sector

command sequence, or until power is removed

from the device. On power-up, or following a hard-

ware reset, the device reverts to addressing the

Flash array.

Note: While in the Sec2 Read mode, only the reading of

the ‘Replaced Sector’ (Table 3) is affected. Accesses

within the specified sector, but outside the address range

specified in the table, may produce indeterminate results.

Reading of all other sectors in the device continues nor-

mally while in this mode.

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 sector: starting at word address

0x000000 and ending at 0x000007 for a Bottom

Boot device, and starting at word address

0x1FE000 and ending at 0x1FE007 for a Top Boot

device. See Table 3.

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