SB72-301CR NetBurner Inc, SB72-301CR Datasheet - Page 19

• Manufacturer Part Number: SB72-301CR
• Description: Ethernet Modules & Development Tools 32Bit 62MHz Single Board Module RJ45
• Manufacturer: NetBurner Inc

Specifications of SB72-301CR

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.9
Legend
L = Logic Low = V
Note
The autoselect codes may also be accessed in-system via command sequences. See
7.10
February 23, 2010 S29AL008J_00_09
Manufacturer ID: Spansion
Device ID: S29AL008J
(Top Boot Block)
Device ID: S29AL008J
(Bottom Boot Block)
Sector Group Protection Verification
Secured Silicon Sector Indicator Bit (DQ7) Top
Boot Block
Secured Silicon Sector Indicator Bit (DQ7)
Bottom Boot Block
Description
Autoselect Mode
Sector Group Protection/Unprotection
IL;
H = Logic High = V
The autoselect mode provides manufacturer and device identification, and sector group 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 V
Address pins A6 and A3–A0 must be as shown in
protection, the sector address must appear on the appropriate highest order address bits (see
on page 17
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
Definitions on page 28
The hardware sector group protection feature disables both program and erase operations in any sector
group (see
re-enables both program and erase operations in previously protected sector groups. Sector group
protection/unprotection can be implemented via two methods.
Sector protection/unprotection requires V
system or via programming equipment.
on page 48
sector group unprotect, all unprotected sector groups must first be protected prior to the first sector group
unprotect write cycle.
The device is shipped with all sector groups unprotected. Spansion offers the option of programming and
protecting sector groups at its factory prior to shipping the device through Spansion Programming Service.
Contact a Spansion representative for details.
It is possible to determine whether a sector group is protected or unprotected. See
on page 19
Table 7.2 on page 17
and
shows the timing diagram. This method uses standard microprocessor bus cycle timing. For
for details.
Word
Byte
Word
Byte
IH;
Table 7.6 S29AL008J Autoselect Codes (High Voltage Method)
Mode
SA = Sector Address; X = Don’t care
Table 7.4 on page
CE#
L
L
L
L
L
L
L
L
for details on using the autoselect mode.
D a t a
OE#
L
L
L
L
L
L
L
L
Table 10.1 on page
WE#
to
H
H
H
H
H
H
H
H
18).
S h e e t
Table 7.5 on page
Table 7.6
A18
A10
Figure 7.2 on page 22
S29AL008J
SA
to
X
X
X
X
X
ID
on the RESET# pin only, and can be implemented either in-
V
V
V
V
V
V
A9
ID
ID
ID
ID
ID
ID
Table 10.1 on page
shows the remaining address bits that are don’t care. When
Table
A8
A7
to
X
X
X
X
X
X
33. This method does not require V
A6
18). The hardware sector group unprotection feature
L
L
L
L
L
L
7.6. In addition, when verifying sector group
A5
A4
to
X
X
X
X
X
X
shows the algorithms and
A3
A2
to
33.
L
L
L
L
L
L
A1
H
H
H
L
L
L
ID
(8.5 V to 12.5 V) on address pin A9.
A0
H
H
H
H
L
L
DQ15
DQ8
22h
22h
to
X
X
X
X
X
X
X
Autoselect Mode
0Eh (not factory locked)
16h (not factory locked)
ID
8Eh (factory locked)
96h (factory locked)
Figure 17.11
. See
00h (unprotected)
01h (protected)
Table 7.2
DQ7
DQ0
DAh
DAh
5Bh
5Bh
Command
01h
to
19