AM29DL320G datasheet(18/58 Pages) SPANSION

18 / 58 page

Am29DL320G

September 27, 2004

Autoselect Mode

The autoselect mode provides manufacturer and de-

vice identification, and sector protection verification,

through identifier codes output on DQ7–DQ0. This

mode is primarily intended for programming equip-

ment to automatically match a device to be pro-

grammed with its co rresponding programm ing

algorithm. However, the autoselect codes can also be

accessed in-system through the command register.

When using programming equipment, the autoselect

mode requires V

ID (8.5 V to 12.5 V) on address pin A9.

Address pins A6, A1, and A0 must be as shown in

Table 6. In addition, when verifying sector protection,

the sector address must appear on the appropriate

highest order address bits (see Table 2). Table 6

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 corre-

sponding identifier code on DQ7–DQ0.

To access the autoselect codes in-system, the host

system can issue the autoselect command via the

command register, as shown in Table 13. This method

does not require V

ID. Refer to the Autoselect Com-

mand Sequence section for more information.

Table 6.

Autoselect Codes, (High Voltage Method)

Legend: T = Top Boot Block, B = Bottom Boot Block, L = Logic Low = V

IL, H = Logic High = VIH, BA = Bank Address, SA = Sector Address, X =

Don’t care.

Notes:

The bank address bits are A20–A18.

The device ID must be read across three cycles.

Description

CE# OE# WE#

A20

A12

A11

A10

DQ15 to DQ8

DQ7

DQ0

BYTE#

= V

BYTE#

= V

Manufacturer ID:

AMD

01h

Read Cycle 1

LLL

22h

7Eh

Read Cycle 2

HHH

22h

0Ah

Read Cycle 3

HHHH

22h

01h (T), 00h (B)

Sector Protection

Verification

01h (protected),

00h (unprotected)

SecSi

™ Indicator

Bit (DQ7)

82h (factory locked),

02h (not factory

locked)

AM29DL320G датащи(PDF) 18 Page - SPANSION

AM29DL320G датащи(HTML) 18 Page - SPANSION

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

датащи скачать

ссылки URL