S71GL064A08 SPANSION [SPANSION], S71GL064A08 Datasheet - Page 32

• Manufacturer Part Number: S71GL064A08
• Description: STACKED MULTI CHIP PRODUCT FLASH MEMORY AND RAM
• Manufacturer: SPANSION [SPANSION]

Legend: L = Logic Low = V
30
Sector Group Protection and Unprotection
Manufacturer
ID: Spansion
Products
Sector Group
Protection
Verification
Secured Silicon
Sector
Indicator Bit
(DQ7), WP#
protects
highest address
sector
Secured Silicon
Sector
Indicator Bit
(DQ7), WP#
protects lowest
address sector
Description
Cycle 1
Cycle 2
Cycle 3
The hardware sector group protection feature disables both program and erase operations in
any sector group. In this device, a sector group consists of four adjacent sectors that are pro-
tected or unprotected at the same time (see
unprotection feature 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
either in-system or via programming equipment.
23
For 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 pro-
gramming 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 the
toselect Mode
shows the timing diagram. This method uses standard microprocessor bus cycle timing.
CE# OE#
L
L
L
L
L
IL
, H = Logic High = V
L
L
L
L
L
Table 4. Autoselect Codes, (High Voltage Method)
section for details.
WE
H
H
H
H
H
#
A22
A15
SA
to
X
X
X
X
A14
A10
to
X
X
X
X
X
V
V
V
V
V
A9
IH
A d v a n c e
ID
ID
ID
ID
ID
, SA = Sector Address, X = Don’t care.
S71GL064A based MCPs
A8
A7
to
X
X
X
X
X
A6
L
L
L
L
L
A5
A4
to
X
X
X
X
X
ID
A3
A2
to
H
H
L
L
L
L
L
on the RESET# pin only, and can be implemented
I n f o r m a t i o n
A1
H
H
H
H
H
L
L
Figure 2
A0
H
H
H
H
L
L
L
Table
BYTE#
= V
DQ8 to DQ15
00
22
22
22
X
X
X
IH
4). The hardware sector group
shows the algorithms and
BYTE# =
V
X
X
X
X
X
X
X
IL
98h (factory locked),
88h (factory locked),
00h (bottom boot)
00h (unprotected)
01h (protected),
18h (not factory
08h (not factory
01h (top boot)
S71GL064A_00_A2 February 8, 2005
DQ7 to DQ0
locked)
locked)
01h
7Eh
10h
Figure
Au-