S29AL016D SPANSION, S29AL016D Datasheet - Page 10

• Manufacturer Part Number: S29AL016D
• Description: 16 MEGABIT CMOS 3.0 VOLT ONLY BOOT SECTOR FLASH MEMORY
• Manufacturer: SPANSION

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DataSheet
4
Device Bus Operations
Legend:
L = Logic Low = V
= Data Out
Notes:
1. Addresses are A19:A0 in word mode (BYTE# = V
2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See the
Word/Byte Configuration
10
Read
Write
Standby
Output Disable
Reset
Sector Protect
Sector Unprotect
Temporary Sector
Unprotect
U
“Sector Protection/Unprotection” section.
.com
Operation
(Note
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 location. The register is com-
posed of latches that 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 device.
trol levels they require, and the resulting output. The following subsections
describe each of these operations in further detail.
The BYTE# pin controls whether the device data I/O pins DQ15–DQ0 operate in
the byte or word configuration. If the BYTE# pin is set at logic ‘1’, the device is in
word configuration, DQ15–DQ0 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.
(Note
IL
, H = Logic High = V
2)
2)
V
0.3 V
CE#
CC
X
X
L
L
L
L
L
±
Table 1. S29AL016D Device Bus Operations
OE# WE# RESET#
H
X
H
X
H
H
X
L
IH
Table 1
, V
H
H
X
X
X
L
L
L
ID
= 12.0 ± 0.5 V, X = Don’t Care, A
lists the device bus operations, the inputs and con-
V
0.3 V
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V
V
V
CC
H
H
H
L
ID
ID
ID
IH
±
S29AL016D
), A19:A-1 in byte mode (BYTE# = V
P r e l i m i n a r y
A6 = H, A1 = H,
Sector Address,
A6 = L, A1 = H,
Sector Address,
Addresses
(Note
A0 = L
A0 = L
A
A
A
X
X
X
IN
IN
IN
1)
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High-Z
High-Z
High-Z
DQ0–
IN
DQ7
D
D
D
D
D
OUT
IN
IN
IN
IN
= Address In, D
BYTE#
High-Z
High-Z
High-Z
= V
D
D
D
IL
OUT
X
X
IN
IN
S29AL016D_00_A2 December 17, 2004
).
IH
DQ8–DQ14 = High-Z,
DQ8–DQ15
IN
DQ15 = A-1
= Data In, D
BYTE#
High-Z
High-Z
High-Z
High-Z
= V
X
X
IL
OUT