S71AL016M datasheet(22/68 Pages) SPANSION

22 / 68 page

S71AL016M

S71AL016M_M0 A0 February 23, 2005

Advanc e

Informatio n

Autoselect Mode

The autoselect mode provides manufacturer and device identification, and sec-

tor 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 com-

mand register.

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. In addition, when verifying sector protection, the sector address must

appear on the appropriate highest order address bits (see Table 2 on page 20

and Table 3 on page 21). Table 4 on page 22 shows the remaining address bits

that are don’t care. When all necessary bits are set as required, the program-

ming equipment may then read the corresponding identifier code on DQ7-DQ0.

To access the autoselect codes in-system, the host system can issue the autose-

lect command via the command register, as shown in Table 10 on page 37 and

Table 11 on page 43. This method does not require VID. See Command

Definitions on page 29 for details on using the autoselect mode.

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

Note: The autoselect codes may also be accessed in-system via command sequences. See Table 10 on page 37 and

Table 11 on page 43.

Sector Protection/Unprotection

The hardware sector protection feature disables both program and erase opera-

tions in any sector. The hardware sector unprotection feature re-enables both

program and erase operations in previously protected sectors.

The device is normally shipped with all sectors unprotected. However, the Ex-

pressFlash™ Service offers the option of programming and protecting sectors at

the factory prior to shipping the device. Contact a sales office or representative

for details.

Table 4. Autoselect Codes (High Voltage Method)

Description

CE# OE# WE#

A19

A12

A11

A10 A9

DQ8

DQ15

DQ7

DQ0

Manufacturer ID

(Spansion Products)

VID

01h

Device ID:

S29AL016M (Model 01)

(Top Boot Block)

VID

22h

C4h

Device ID:

S29AL016M (Model 02)

(Bottom Boot Block)

VID

22h

49h

Sector Protection

Verification

VID

01h (protected)

00h

(unprotected)

SecSi Sector Indicator

Bit (DQ7)

VID

83 (factory

locked

03h (not

factory locked)

S71AL016M Datasheet(PDF) 22 Page - SPANSION

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