AS29LV800B-120SC ANADIGICS [ANADIGICS, Inc], AS29LV800B-120SC Datasheet - Page 3

• Manufacturer Part Number: AS29LV800B-120SC
• Manufacturer: ANADIGICS [ANADIGICS, Inc]

March 2001
Operating modes
L = Low (<V
In ×16 mode, BYTE = V
†
Mode definitions
3/22/01; V.1.0
Mode
ID read MFR code
ID read device code
Read
Standby
Output disable
Write
Enable sector protect
Sector unprotect
Temporary sector
unprotect
Verify sector protect
Verify sector unprotect
Hardware Reset
Verification of sector protect/unprotect during A9 = V
Item
ID MFR code,
device code
Read mode
Standby
Output disable Part remains powered up; but outputs disabled with OE pulled high.
Write
Enable
sector protect
Sector
unprotect
Verify sector
protect/
unprotect
IL
) = logic 0; H = High (>V
Description
Selected by A9 = V
When A0 is low (V
When A0 is high (V
Selected with CE = OE = L, WE = H. Data is valid in t
and t
Selected with CE = H. Part is powered down, and I
activated during an automated on-chip algorithm, the device completes the operation before entering
standby.
Selected with CE = WE = L, OE = H. Accomplish all Flash erasure and programming through the command
register. Contents of command register serve as inputs to the internal state machine. Address latching occurs
on the falling edge of WE or CE, whichever occurs later. Data latching occurs on the rising edge WE or CE,
whichever occurs first. Filters on WE prevent spurious noise events from appearing as write commands.
Hardware protection circuitry implemented with external programming equipment causes the device to
disable program and erase operations for specified sectors. For in-system sector protection, refer to Sector
protect algorithm on page 14.
Disables sector protection for all sectors using external programming equipment. All sectors must be
protected prior to sector unprotection. For in-system sector unprotection, refer to Sector unprotect algorithm
on page 14.
Verifies write protection for sector. Sectors are protected from program/erase operations on commercial
programming equipment. Determine if sector protection exists in a system by writing the ID read command
sequence and reading location XXX02h, where address bits A12–18 select the defined sector addresses. A
logical 1 on DQ0 indicates a protected sector; a logical 0 indicates an unprotected sector.
IH
†
. In ×8 mode, BYTE = V
OE
†
after OE is low.
CE
L
L
L
H
L
L
L
L
X
L
L
X
IH
) = logic 1; V
ID
IL
OE
L
L
L
X
H
H
V
V
X
L
L
X
IH
) the output data = 52h, a unique Mfr. code for Alliance Semiconductor Flash products.
(9.5V–10.5V), CE = OE = A1 = A6 = L, enabling outputs.
ID
ID
), D
IL
with DQ8-DQ14 in high Z and DQ15 = A-1.
OUT
Alliance Semiconductor
ID.
ID
WE
H
H
H
X
H
L
Pulse/L
Pulse/L
X
H
H
X
= 10.0 ± 1.0V; X = don’t care.
represents the device code for the AS29LV800.
A0
L
H
A0
X
X
A0
L
L
X
L
L
X
CC
®
A1
L
L
A1
X
X
A1
H
H
X
H
H
X
reduced to <1.0 µA when CE = V
ACC
time after addresses are stable, t
A6
L
L
A6
X
X
A6
L
H
X
L
H
X
A9
V
V
A9
X
X
A9
V
V
X
V
V
X
ID
ID
ID
ID
ID
ID
RESET
H
H
H
H
H
H
H
H
V
H
H
L
ID
CC
CE
± 0.3V = RESET. If
after CE is low
AS29LV800
DQ
Code
Code
High Z
High Z
D
X
X
X
Code
Code
High Z
D
OUT
IN
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