AT29LV020-25JC_ 查看數據表（PDF） - Atmel Corporation
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AT29LV020-25JC_ Datasheet PDF : 10 Pages
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Device Operation (Continued)
BOOT BLOCK LOCKOUT DETECTION: A software
method is available to determine whether programming of
either boot block section is locked out. See Software Prod-
uct Identification Entry and Exit sections. When the device
is in the software product identification mode, a read from
location 00002H will show if programming the lower ad-
dress boot block is locked out while reading location
DC and AC Operating Range
FFFF2H will do so for the upper boot block. If the data is
FE, the corresponding block can be programmed; if the
data is FF, the program lockout feature has been activated
and the corresponding block cannot be programmed. The
software product identification exit mode should be used
to return to standard operation.
AT29LV020-20
AT29LV020-25
Operating
Temperature (Case)
VCC Power Supply (1)
Com.
Ind.
0°C - 70°C
-40°C - 85°C
3.3V ± 0.3V
0°C - 70°C
-40°C - 85°C
3.3V ± 0.3V
1. After power is applied and VCC is at the minimum specified data sheet value, the system should wait 20 ms before an operational
mode is started.
Operating Modes
Mode
Read
Program (2)
Standby/Write Inhibit
Program Inhibit
Program Inhibit
Output Disable
Product Identification
Hardware
Software (5)
CE
OE
WE
VIL
VIL
VIH
VIL
VIH
VIL
VIH
X (1)
X
X
X
VIH
X
VIL
X
X
VIH
X
Ai
I/O
Ai
DOUT
Ai
DIN
X
High Z
High Z
VIL
VIL
VIH
A1 - A17 = VIL, A9 = VH (3),
A0 = VIL
A1 - A17 = VIL, A9 = VH (3),
A0 = VIH
Manufacturer Code (4)
Device Code (4)
A0 = VIL
Manufacturer Code (4)
A0 = VIH
Device Code (4)
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
DC Characteristics
4. Manufacturer Code: 1F, Device Code: BA.
5. See details under Software Product Identification Entry/Exit.
Symbol Parameter
Condition
Min
ILI
Input Load Current
VIN = 0V to VCC
ILO
Output Leakage Current
VI/O = 0V to VCC
Com.
ISB1
VCC Standby Current CMOS
CE = VCC - 0.3V to VCC
Ind.
ISB2
VCC Standby Current TTL
CE = 2.0V to VCC
ICC
VCC Active Current
f = 5 MHz; IOUT = 0 mA; VCC = 3.6V
VIL
Input Low Voltage
VIH
Input High Voltage
2.0
VOL
Output Low Voltage
IOL = 1.6 mA; VCC = 3.0V
VOH
Output High Voltage
IOH = -100 µA; VCC = 3.0V
2.4
Max
Units
1
µA
1
µA
20
µA
50
µA
1
mA
15
mA
0.6
V
V
.45
V
V
4-76
AT29LV020
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