S29AS016J datasheet(18/60 Pages) SPANSION

18 / 60 page

S29AS016J

S29AS016J_00_11 February 1, 2012

Da ta

Sh e e t

7.9

Autoselect Mode

The autoselect mode provides manufacturer and device identification, sector group protection verification,

and Secured Silicon Sector status 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 (9.0 V to 11.0 V) on address pin A9.

Address pins A6, A3, A2, A1, and A0 must be as shown in Table 7.2. In addition, when verifying sector group

protection, the sector address must appear on the appropriate highest order address bits (see Table 7.3

on page 19 and Table 7.4 on page 20). Table 7.2 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.

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

command register, as shown in Table 11.1 on page 36. This method does not require VID. See Command

Definitions on page 31 for details on using the autoselect mode.

Legend

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 11.1 on page 36.

Table 7.2 S29AS016J Autoselect Codes (High Voltage Method)

Description

CE#

OE#

WE#

A19

A12

A11

A10

DQ8 to DQ15

DQ7

DQ0

BYTE =

VIH

BYTE =

VIL

Manufacturer ID:

Spansion

VID

00h

01h

Device ID

Cycle 1

VID

22h

7Eh

Cycle 2

VID

22h

03h

Cycle 3

VID

HHH

22h

04h (Top Boot),

03h (Bottom Boot)

Sector Group Protection

Verification

VID

01h (protected),

00h (unprotected)

Secured Silicon Sector

Indicator Bit (DQ7), WP#

protects highest address

sector

VID

89h (factory locked),

09h (not factory locked)

Secured Silicon Sector

Indicator Bit (DQ7), WP#

protects lowest address

sector

VID

91h (factory locked),

11h (not factory locked)

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