AT29C040 ATMEL Corporation, AT29C040 Datasheet - Page 4

• Manufacturer Part Number: AT29C040
• Description: 4-Megabit 512K x 8 5-volt Only 256-Byte Sector CMOS Flash Memory
• Manufacturer: ATMEL Corporation

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 Modes
Notes: 1. X can be V
DC Characteristics
4
I
I
I
I
I
V
V
V
V
V
Operating
Temperature (Case)
V
Mode
Read
Program
Standby/Write Inhibit
Program Inhibit
Program Inhibit
Output Disable
Product Identification
Symbol
LI
LO
SB1
SB2
CC
IL
IH
OL
OH1
OH2
CC
Hardware
Software
Power Supply
2. Refer to AC Programming Waveforms.
3. V
(2)
H
= 12.0V
Input Load Current
Output Leakage Current
V
V
V
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output High Voltage CMOS
(5)
Parameter
CC
CC
CC
Active Current
Standby Current CMOS
Standby Current TTL
IL
AT29C040A
or V
0.5V.
IH
Com.
Ind.
.
V
CE
V
V
V
X
X
X
IH
IL
IL
IL
AT29C040A-10
-40 C - 85 C
OE
V
V
0 C - 70 C
V
X
V
V
5V
X
IH
IH
IL
IL
IL
(1)
V
Condition
V
CE = V
CE = 2.0V to V
f = 5 MHz; I
I
I
I
OL
OH
OH
IN
I/O
10%
= 2.1 mA
= 0V to V
= -400 A
= -100 A; V
= 0V to V
CC
WE
V
V
V
V
X
X
X
IH
IH
IH
- 0.3V to V
IL
OUT
CC
CC
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.
4. Manufacturer Code: 1F, Device Code: A4
5. See details under Software Product Identification Entry/Exit.
CC
= 0 mA
CC
A1 - A18 = V
A1 - A18 = V
= 4.5V
CC
AT29C040A-12
-40 C - 85 C
0 C - 70 C
5V
A0 = V
A0 = V
A0 = V
A0 = V
Com.
Ind.
Ai
Ai
Ai
X
IL
IL
10%
, A9 = V
, A9 = V
IH
IH
IL
IL
H
H
,
,
(3)
(3)
Min
2.0
2.4
4.2
I/O
D
D
High Z
High Z
Manufacturer Code
Device Code
Manufacturer Code
Device Code
OUT
IN
AT29C040A-15
-40 C - 85 C
0 C - 70 C
Max
100
300
5V 10%
0.8
.45
10
10
40
3
(4)
(4)
Units
mA
mA
V
V
V
V
V
A
A
A
A
(4)
(4)