as29lv016brg-90/xt Austin Semiconductor, Inc., as29lv016brg-90/xt Datasheet - Page 6

• Manufacturer Part Number: as29lv016brg-90/xt
• Description: 16 Megabit 2m X 8-bit / 1m X 16-bit Cmos 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: Austin Semiconductor, Inc.

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 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. Table 1 lists the device bus operations, the inputs and control levels they require, and
the resulting output. The following subsections describe each of these operations in further detail.
WORD / BYTE CONFIGURATION
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.
AS29LV016
Rev. 2.0 06/06
Table 1: AS29LV016 Device Bus Operations
Read
Write
Standby
Output Disable
Reset
Sector Protect
Sector Unprotect
Temporary Sector Unprotect
Legend:
L= Logic Low = V
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 Sector Protection /
Unprotection on page 11.
Operation
2
2
IL
, H=Logic High=V
Vcc ± 0.3V
Austin Semiconductor, Inc.
CE#
X
X
L
L
L
L
L
IH
, V
ID
=12.0±0.5V, X=Don't Care, A
OE#
H
H
H
H
L
X
X
X
IH
), A19:A-1 in byte mode (BYTE# = V
WE#
H
H
X
X
X
L
L
L
Vcc ± 0.3V
RESET#
6
V
V
V
H
H
H
L
ID
ID
ID
IN
=Address In, D
A6=H, A1=H, A0=L
A6=L, A1=H, A0=L
Sector Address,
Sector Address,
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
Address
BOO
BOOT SECT
BOO
BOO
BOO
A
A
A
X
X
X
IN
IN
IN
IL
IN
)
= Data In, D
1
T SECT
T SECTOR FLASH
T SECT
T SECT
High-Z
High-Z
High-Z
DQ0-
D
DQ7
D
D
D
D
OUT
IN
IN
IN
IN
OUT
=Data Out
BYTE#
High-Z
High-Z
High-Z
D
=V
D
D
OUT
X
X
IN
IN
CO
COTS PEM
CO
CO
CO
IH
OR FLASH
OR FLASH
OR FLASH
OR FLASH
AS29LV016
DQ8-DQ15
DQ8-DQ14= High Z,
TS PEM
TS PEM
TS PEM
TS PEM
DQ15=A-1
BYTE#
High-Z
High-Z
High-Z
High-Z
=V
X
X
IL