AM29SL160C datasheet(16/52 Pages) AMD

16 / 52 page

Am29SL160C

November 1, 2004

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.

When using programming equipment, the autoselect

mode requires VID on address pin A9. Address pins A6,

A1, and A0 must be as shown in Table 4. In addition,

when verifying sector protection, the sector address

must appear on the appropriate highest order address

bits (see Tables 2 and 3). Table 4 shows the remaining

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

bits are set as required, the programming equipment

may then read the corresponding 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 12, on page 28.

This method does not require VID. See “Command Def-

initions” on page 23 for details on using the autoselect

mode.

Table 4. Am29SL160C Autoselect Codes (High Voltage Method)

L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.

Note: Outputs for data bits DQ8–DQ15 are for BYTE#=VIH. DQ8–DQ15 are don’t care when BYTE#=VIL.

Description

Mode

CE#

OE#

WE#

A19

A12

A11

A10

DQ8

DQ15

DQ7

DQ0

Manufacturer ID: AMD

VID

XLX

01h

Device ID:

Am29SL160CT

(Top Boot Block)

Word

VID

XLX

22h

Byte

Device ID:

Am29SL160CB

(Bottom Boot

Block)

Word

VID

XLX

22h

Byte

Sector Protection Verification

VID

XLX

01h

(protected)

00h

(unprotected)

SecSi Sector Indicator bit

(DQ7)

VID

XLX

81h

(factory

locked)

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