29C040 데이터 시트보기 (PDF) - Atmel Corporation
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29C040 Datasheet PDF : 11 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
Operating
Temperature (Case)
VCC Power Supply
Com.
Ind.
AT29C040A-12
0°C - 70°C
-40°C - 85°C
5V ± 10%
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.
AT29C040A-15
0°C - 70°C
-40°C - 85°C
5V ± 10%
AT29C040A-20
0°C - 70°C
-40°C - 85°C
5V ± 10%
Operating Modes
Mode
Read
Program (2)
Standby/Write Inhibit
Program Inhibit
Program Inhibit
Output Disable
Product Identification
Hardware
CE
OE
VIL
VIL
VIL
VIH
VIH
X (1)
X
X
X
VIL
X
VIH
VIL
VIL
Software (5)
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
DC Characteristics
WE
Ai
I/O
VIH
Ai
DOUT
VIL
Ai
DIN
X
X
High Z
VIH
X
X
High Z
VIH
A1 - A18 = VIL, A9 = VH, (3)
A0 = VIL
A1 - A18 = VIL, A9 = VH, (3)
A0 = VIH
Manufacturer Code (4)
Device Code (4)
A0 = VIL
Manufacturer Code (4)
A0 = VIH
Device Code (4)
4. Manufacturer Code: 1F, Device Code: A4
5. See details under Software Product Identification Entry/Exit.
Symbol
ILI
ILO
Parameter
Input Load Current
Output Leakage Current
ISB1
VCC Standby Current CMOS
ISB2
ICC
VIL
VIH
VOL
VOH1
VOH2
VCC Standby Current TTL
VCC Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output High Voltage CMOS
Condition
VIN = 0V to VCC
VI/O = 0V to VCC
CE = VCC - 0.3V to VCC
CE = 2.0V to VCC
f = 5 MHz; IOUT = 0 mA
Com.
Ind.
IOL = 2.1 mA
IOH = -400 µA
IOH = -100 µA; VCC = 4.5V
Min
Max
Units
10
µA
10
µA
100
µA
300
µA
3
mA
40
mA
0.8
V
2.0
V
.45
V
2.4
V
4.2
V
4-168
AT29C040A
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