S29GL-A SPANSION [SPANSION], S29GL-A Datasheet - Page 46

• Manufacturer Part Number: S29GL-A
• Description: S29GL-A MirrorBit Flash Family
• Manufacturer: SPANSION [SPANSION]

44
Autoselect Command Sequence
Enter/Exit Secured Silicon Sector Command Sequence
If DQ5 goes high during a program or erase operation, writing the reset com-
mand 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
system must write the Write-to-Buffer-Abort Reset command sequence to reset
the device for the next operation.
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).
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 Sili-
con 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.
page 55
See also
formation. Note that the ACC function and unlock 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
controls or timings. The device automatically provides internally generated pro-
gram pulses and verifies the programmed cell margin.
Table 31 on page 55
gram command sequence, respectively.
Secured Silicon Sector Factory Protect
show the address and data requirements for both command sequences.
Secured Silicon Sector Flash Memory Region on page 37
Sector Protect Verify
Device ID, Cycle 1
Device ID, Cycle 2
Device ID, Cycle 3
Identifier Code
Manufacturer ID
show the address and data requirements for the word pro-
S29GL-A MirrorBit™ Flash Family
A d v a n c e
Table 30 on page 54
I n f o r m a t i o n
(SA)02h
A7:A0
(x16)
00h
01h
0Eh
0Fh
03h
Table 30 on page 54
and
for further in-
(SA)04h
A6:A-1
Table 31 on
(x8)
00h
02h
1Ch
1Eh
06h
S29GL-A_00_A3 April 22, 2005
and