AM29LV2562M AMD [Advanced Micro Devices], AM29LV2562M Datasheet - Page 11

• Manufacturer Part Number: AM29LV2562M
• Manufacturer: AMD [Advanced Micro Devices]

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 A23:A0 in doubleword mode; A23:A-1 in word mode. Sector addresses are A23:A15 in both modes.
2. The sector group protect and sector group unprotect functions may also be implemented via programming equipment. See the
3. If WP# = V
4. D
Word/Byte Configuration
The WORD# pin controls whether the device data I/O
pins operate in the word or doubleword configuration.
If the WORD# pin is set at V
word configuration, DQ31–DQ0 are active and con-
trolled by CE# and OE#.
If the WORD# pin is set at V
configuration, and only data I/O pins DQ15–DQ0 are
active and controlled by CE# and OE#. The data I/O
pins DQ31–DQ16 are tri-stated, and the DQ23 and
December 16, 2005
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
“Sector Group Protection and Unprotection” section.
determined by the method described in “Write Protect (WP#)” All sectors are unprotected when shipped from the factory (The
SecSi Sector may be factory protected depending on version ordered.)
= Address In, D
IN
Operation
or D
OUT
IL
, the first or last sector group remains protected. If WP# = V
as required by command sequence, data polling, or sector protect algorithm (see Figure 2).
IN
= Data In, D
V
0.3 V
CE#
CC
IL
X
X
L
L
L
L
L
L
, H = Logic High = V
±
IH
, the device is in double-
IL
OUT
OE#
, the device is in word
H
H
X
H
X
H
H
X
L
= Data Out
WE# RESET#
H
X
H
X
X
L
L
L
L
Table 1. Device Bus Operations
IH
V
0.3 V
D A T A S H E E T
, V
CC
V
V
V
H
H
H
H
L
ID
ID
ID
ID
±
Am29LV2562M
= 11.5–12.5 V, V
(Note 3)
(Note 3)
WP#
X
X
X
X
H
H
H
register serve as inputs to the internal state machine.
The state machine outputs dictate the function of the
device. Table 1 lists the device bus operations, the in-
puts and control levels they require, and the resulting
output. The following subsections describe each of
these operations in further detail.
DQ31 pins are used as inputs for the LSB (A-1) ad-
dress function.
VersatileIO
The VersatileIO
to set the voltage levels that the device generates and
tolerates on CE# and DQ I/Os to the same voltage
level that is asserted on V
for V
ACC
V
L/H
L/H
L/H
L/H
L/H
L/H
L/H
H
IH
HH
HH
IO
, the first or last sector will be protected or unprotected as
options on this device.
= 11.5–12.5V, X = Don’t Care, SA = Sector Address,
A3=L, A2=L,
A3=L, A2=L,
A1=H, A0=L
A1=H, A0=L
Addresses
SA, A6 =L,
SA, A6=H,
(Note 2)
TM
A
A
A
A
X
X
X
IN
IN
IN
IN
TM
(V
(V
IO
IO
) Control
) control allows the host system
(Note 4) (Note 4)
(Note 4) (Note 4)
(Note 4)
(Note 4)
(Note 4) (Note 4)
DQ15–
High-Z
High-Z
High-Z
D
DQ0
IO
OUT
. See
WORD#
High-Z
High-Z
High-Z
Ordering Information
= V
D
OUT
X
X
IH
DQ31–DQ16
DQ31–DQ16
DQ23= A-1
= High-Z,
WORD#
DQ31 &
High-Z
High-Z
High-Z
High-Z
= V
X
X
IL
9