S29GL032A datasheet(46/88 Pages) SPANSION

46 / 88 page

S29GLxxxA MirrorBit™ Flash Family

S29GLxxxA_00_A2 January 28, 2005

Ad van c e

Inf o rmation

If DQ5 goes high during a program or erase operation, writing the reset command

returns the device to the read mode (or erase-suspend-read mode if the device

was in Erase Suspend).

Note that if DQ1 goes high during a Write Buffer Programming operation, the sys-

tem must write the Write-to-Buffer-Abort Reset command sequence to reset the

device for the next operation.

Autoselect Command Sequence

The autoselect command sequence allows the host system to read several iden-

tifier codes at specific addresses:

Note: The device ID is read over three cycles. SA = Sector Address

The autoselect command sequence is initiated by first writing two unlock cycles.

This is followed by a third write cycle that contains the autoselect command. The

device then enters the autoselect mode. The system may read at any address any

number of times without initiating another autoselect command sequence:

The system must write the reset command to return to the read mode (or erase-

suspend-read mode if the device was previously in Erase Suspend).

Enter Secured Silicon Sector/Exit Secured Silicon

Sector Command Sequence

The Secured Silicon Sector region provides a secured data area containing an 8-

word/16-byte random Electronic Serial Number (ESN). The system can access

the Secured Silicon Sector region by issuing the three-cycle Enter Secured Silicon

Sector command sequence. The device continues to access the Secured Silicon

Sector region until the system issues the four-cycle Exit Secured Silicon Sector

command sequence. The Exit Secured Silicon Sector command sequence returns

the device to normal operation. Table 25 and Table 26 show the address and data

requirements for both command sequences. See also “Secured Silicon Sector

Flash Memory Region” for further information. Note that the ACC function and un-

lock bypass modes are not available when the Secured Silicon Sector is enabled.

Word Program Command Sequence

Programming is a four-bus-cycle operation. The program command sequence is

initiated by writing two unlock write cycles, followed by the program set-up com-

mand. The program address and data are written next, which in turn initiate the

Embedded Program algorithm. The system is not required to provide further con-

trols or timings. The device automatically provides internally generated program

pulses and verifies the programmed cell margin. Table 25 and Table 26 show the

address and data requirements for the word program command sequence,

respectively.

Identifier Code

A7:A0

(x16)

A6:A-1

(x8)

Manufacturer ID

00h

Device ID, Cycle 1

01h

02h

Device ID, Cycle 2

0Eh

1Ch

Device ID, Cycle 3

0Fh

1Eh

Secured Silicon Sector Factory Protect

03h

06h

Sector Protect Verify

(SA)02h

(SA)04h

S29GL032A Datasheet(PDF) 46 Page - SPANSION

S29GL032A Datasheet(HTML) 46 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 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88

Datasheet Download

Link URL