AM29DS32XG datasheet(16/52 Pages) SPANSION

16 / 52 page

May 15, 2002

Am29DS32xG

ADV ANC E

INFO RMAT ION

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-

gra mm ed w it h its co rresp on ding p rog ram min g

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 on address pin A9. Address pins

A6, A1, and A0 must be as shown in Table 7. In addi-

tion, when verifying sector protection, the sector ad-

dress must appear on the appropriate highest order

address bits (see Tables 3–6). Table 7 shows the re-

maining address bits that are don’t care. When all nec-

essa r y b i ts have been s e t as r e q u ir ed, 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 14. This method

does not require V

ID. Refer to the Autoselect Com-

mand Sequence section for more information.

Table 7.

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.

Description

CE#

OE#

WE#

A20

A12

A11

A10

DQ15 to DQ8

DQ7

DQ0

BYTE#

= VIH

BYTE#

= VIL

Manufacturer ID: AMD

01h

Device ID: Am29DS322G

22h

BBh (T), C0h (B)

Device ID: Am29DS323G

VID

22h

B7hh (T), B8h (B)

Device ID: Am29DS324G

22h

C9h (T), CAh (B)

Sector Protection

Verification

01h (protected),

00h (unprotected)

SecSi

 Indicator Bit

(DQ7)

81h (factory locked),

01h (not factory

locked)

AM29DS32XG 데이터시트(PDF) 16 Page - SPANSION

AM29DS32XG 데이터시트(HTML) 16 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

데이터시트 다운로드

링크 URL