AS29LV016JTRG-70 Просмотр технического описания (PDF) - Austin Semiconductor

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AS29LV016JTRG-70

16 Megabit (2M x 8-Bit / 1M x 16-Bit) CMOS 3.0 Volt-Only Boot Sector Flash Memory

Austin Semiconductor 

COTS PEM

BOOT SECTOR FLASH

Austin Semiconductor, Inc.

AS29LV016J

AUTOSELECT MODE

The autoselect mode provides manufacturer and device

identification, and sector protection verification, through

identifier codes output on DQ7–DQ0. This mode is

primarily intended for programming equipment to

automatically match a device to be programmed with its

corresponding programming algorithm. However, the

autoselect codes can also be accessed in-system

through the command register.

In addition, when verifying sector protection, the sector

address must appear on the appropriate highest order

address bits (see Table 2 on page 9 and Table 3 on

page 10). Table 4, immediately below, shows the

remaining address bits that are don’t care. When all

necessary bits have been set as required, the

programming equipment may then read the corresponding

identifier code on DQ7-DQ0.

When using programming equipment, the autoselect mode

requires VID (11.5 V to 12.5 V) on address pin A9. Address

pins A6, A1, and A0 must be as shown in Table 4 below.

To access the autoselect codes in-system, the host

system can issue the autoselect command via the

command register, as shown in Table 9 on page 21. This

method does not require VID. See Command Definitions

on page 17 for details on using the autoselect mode.

Table 4: AS29LV016J Autoselect Codes (High Voltage Method)

Description

Mode CE#

OE#

WE#

A19 to

A10

A9

A8 to

A7

A6

A5 to A3 to

A4 A2

A1

Manufacturer ID: Spansion

L

L

H

X

VID

X

L

X

L

L

Device ID: S29AL016J

(Top Boot Block)

Word L

Byte L

L

L

H

H

X

VID

X

L

X

L

L

Device ID: S29AL016DJ

(Bottom Boot Block)

Word L

Byte L

L

L

H

H

X

VID

X

L

X

L

L

Sector Protection Verification

L

L

H

SA

VID

X

L

X

L

H

L= Logic Low = V IL , H=Logic High=V IH , SA = Sector Address, X=Don't Care

Note: The autoselect codes may also be accessed in-system via command sequences. See Table 9 on page 21.

A0

DQ8 to

DQ15

DQ7 to DQ0

L

X

01h

H

22h

C4h

X

C4h

H

22h

49h

X

49h

L

X

01h (protected)

X 00h (unprotected)

SECTOR PROTECTION / UNPROTECTION

The hardware sector group protection feature disables

both program and erase operations in any sector group

(see Table 2 on page 9 to Table 4 on page 11). The

hardware sector group unprotection feature re-enables both

program and erase operations in previously protected

sector groups. Sector group protection/unprotection can

be implemented via two methods.

Sector protection/unprotection requires VID on the

RESET# pin only, and can be implemented either

insystem or via programming equipment. Figure 2 on page

13 shows the algorithms and Figure 22 on page 36 shows

the timing diagram. This method uses standard

microprocessor bus cycle timing. For sector group

unprotect, all unprotected sector groups must first be

protected prior to the first sector group unprotect write

cycle.

The device is shipped with all sector groups unprotected.

ASI offers the option of programming and protecting sector

groups at its factory prior to shipping the device through

ASI Programming Service. Contact an ASI representative

for details.

It is possible to determine whether a sector group is

protected or unprotected. See Autoselect Mode above

for details.

AS29LV016J

Rev. 0.0 02/09

11

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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