AM29LV640MH SPANSION [SPANSION], AM29LV640MH Datasheet - Page 12

• Manufacturer Part Number: AM29LV640MH
• Description: 64 Megabit (4 M x 16-Bit/8 M x 8-Bit) MirrorBit 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O Control
• Manufacturer: SPANSION [SPANSION]

DEVICE BUS OPERATIONS
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 addressable memory loca-
tion. The register is a latch used to store the com-
mands, along with the address and data information
needed to execute the command. The contents of the
Legend: L = Logic Low = V
A
Notes:
1. Addresses are A21:A0 in word mode; A21:A-1 in byte
2. The sector protect and sector unprotect functions may also
3. If WP# = V
10
Read
Write (Program/Erase)
Accelerated Program
Standby
Output Disable
Reset
Sector Group Protect
(Note 2)
Sector Group Unprotect
(Note 2)
Temporary Sector
Group Unprotect
IN
mode. Sector addresses are A21:A15 in both modes.
be implemented via programming equipment. See the
“Sector Group Protection and Unprotection” section.
WP# = V
= Address In, D
Operation
IH
, the first or last sector will be protected or
IL
, the first or last sector remains protected. If
IN
= Data In, D
V
0.3 V
CE#
CC
IL
X
X
L
L
L
L
L
L
, H = Logic High = V
±
OE# WE# RESET#
OUT
H
H
X
H
X
H
H
X
L
= Data Out
H
X
H
X
X
L
L
L
L
Table 1. Device Bus Operations
V
IH
0.3 V
V
V
V
CC
, V
D A T A S H E E T
H
H
H
H
L
ID
ID
ID
ID
±
Am29LV640MH/L
= 11.5–12.5 V, V
(Note 3)
(Note 3)
WP#
H
H
H
X
X
X
X
register serve as inputs to the internal state machine.
The state machine outputs dictate the function of the
device.
puts and control levels they require, and the resulting
output. The following subsections describe each of
these operations in further detail.
4. D
ACC
V
unprotected as determined by the method described in
“Sector Group Protection and Unprotection”. All sectors are
unprotected when shipped from the factory (The SecSi
Sector may be factory protected depending on version
ordered.)
polling, or sector protect algorithm (see Figure 2).
X
X
H
X
X
X
X
X
HH
HH
IN
or D
= 11.5–12.5 V, X = Don’t Care, SA = Sector Address,
Table 1
A3=L, A2=L,
A3=L, A2=L,
A1=H, A0=L
A1=H, A0=L
Addresses
SA, A6 =L,
SA, A6=H,
OUT
(Note 2)
A
A
A
A
as required by command sequence, data
X
X
X
IN
IN
IN
IN
lists the device bus operations, the in-
(Note 4) (Note 4)
(Note 4) (Note 4)
(Note 4)
(Note 4)
(Note 4) (Note 4)
High-Z
High-Z
High-Z
DQ0–
D
DQ7
OUT
BYTE#
High-Z
High-Z
High-Z
= V
D
December 14, 2005
OUT
X
X
IH
DQ8–DQ15
DQ8–DQ14
DQ15 = A-1
= High-Z,
BYTE#
High-Z
High-Z
High-Z
High-Z
= V
X
X
IL