s29gl064m Meet Spansion Inc., s29gl064m Datasheet - Page 24

• Manufacturer Part Number: s29gl064m
• Description: 3.0 Volt-only Page Mode Flash Memory Featuring 0.23 ?m Mirrorbit Process Technolog
• Manufacturer: Meet Spansion Inc.

Device Bus Operations
Word/Byte Configuration
Requirements for Reading Array Data
22
This section describes the requirements and use of the device bus operations, which are initiated
through the internal command register. The command register itself does not occupy any addres-
sable memory location. The register is a latch used to store the commands, along with the
address and data information needed to execute the command. The contents of the register serve
as inputs to the internal state machine. The state machine outputs dictate the function of the de-
vice.
resulting output. The following subsections describe each of these operations in further detail.
Legend: L = Logic Low = V
V
D
Notes:
1.
2.
3.
4.
The BYTE# pin controls whether the device data I/O pins operate in the byte or word configura-
tion. If the BYTE# pin is set at logic ‘1’, the device is in word configuration, DQ0–DQ15 are active
and controlled by CE# and OE#.
If the BYTE# pin is set at logic ‘0’, the device is in byte configuration, and only data I/O pins DQ0–
DQ7 are active and controlled by CE# and OE#. The data I/O pins DQ8–DQ14 are tri-stated, and
the DQ15 pin is used as an input for the LSB (A-1) address function.
To read array data from the outputs, the system must drive the CE# and OE# pins to V
the power control and selects the device. OE# is the output control and gates array data to the
output pins. WE# should remain at V
Read
Write (Program/Erase)
Accelerated Program
Standby
Output Disable
Reset
Sector Group Protect
(Note
Sector Group Unprotect
(Note
Temporary Sector
Group Unprotect
HH
IN
Addresses are Amax:A0 in word mode; Amax:A-1 in byte mode. Sector addresses are Amax:A15
in both modes.
The sector protect and sector unprotect functions may also be implemented via programming
equipment. See the “Sector Group Protection and Unprotection” section.
If WP# = V
outer boot sectors are protected (for boot sector devices). If WP# = V
the two outer boot sectors are protected or unprotected as determined by the method described in
“Sector Group Protection and Unprotection”. All sectors are unprotected when shipped from the
factory (The Secured Silicon Sector may be factory protected depending on version ordered.)
D
Figure
= Data In, D
= 11.5 V – 12.5 V, X = Don’t Care, SA = Sector Address, A
IN
Table 5
2)
2)
or D
Operation
2).
OUT
IL
as required by command sequence, data polling, or sector protect algorithm (see
lists the device bus operations, the inputs and control levels they require, and the
, the first or last sector remains protected (for uniform sector devices), and the two
OUT
= Data Out
V
0.3 V
CE#
CC
X
X
L
L
L
L
L
L
S29GL-M MirrorBit
±
IL
, H = Logic High = V
OE
#
H
H
H
H
H
L
X
X
X
Table 5. Device Bus Operations
WE# RESET#
H
X
H
X
X
L
L
L
L
IH
D a t a
V
0.3 V
V
V
V
CC
.
H
H
H
H
L
ID
ID
ID
±
TM
Flash Family
(Note
(Note
WP#
H
H
H
X
X
X
X
IH
S h e e t
3)
3) V
, V
ID
AC
X
X
H
X
X
X
X
X
C
HH
= 11.5–12.5 V,
A3=L, A2=L,
A3=L, A2=L,
A1=H, A0=L
A1=H, A0=L
IH
SA, A6 =L,
SA, A6=H,
Addresses
(Note
, the first or last sector, or
IN
A
A
A
A
X
X
X
IN
IN
IN
IN
= Address In,
1)
(Note
(Note
(Note
(Note
(Note
High-Z
High-Z
High-Z
DQ0–
D
DQ7
OUT
S29GL-M_00_B8 February 7, 2007
4)
4)
4)
4)
4)
(Note
(Note
(Note
BYTE#
High-Z
High-Z
High-Z
= V
D
OUT
X
X
IH
DQ8–DQ15
4)
4)
4)
DQ15 = A-1
DQ8–DQ14
IL
= High-Z,
. CE# is
High-Z
High-Z
High-Z
High-Z
BYTE#
= V
X
X
IL