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AT49F040A-70PI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
4
AT49F040A
3359A–FLASH–6/03
Enabling the lockout feature will allow the boot code to stay in the device while data in the rest
of the device is updated. This feature does not have to be activated; the boot block’s usage as
a write protected region is optional to the user. The address range of the boot block is 00000
to 03FFF.
Once the feature is enabled, the data in the boot block can no longer be erased or pro-
grammed. Data in the main memory block can still be changed through the regular
programming method. To activate the lockout feature, a series of six program commands to
specific addresses with specific data must be performed. Please refer to the Command Defini-
tions table.
BOOT BLOCK LOCKOUT DETECTION: A software method is available to determine if pro-
gramming of the boot block section is locked out. When the device is in the software product
identification mode (see Software Product Identification Entry and Exit sections) a read from
address location 00002H will show if programming the boot block is locked out. If the data on
I/O0 is low, the boot block can be programmed; if the data on I/O0 is high, the program lockout
feature has been activated and the block cannot be programmed. The software product identi-
fication exit code should be used to return to standard operation.
PRODUCT IDENTIFICATION: The product identification mode identifies the device and man-
ufacturer as Atmel. It may be accessed by hardware or software operation. The hardware
operation mode can be used by an external programmer to identify the correct programming
algorithm for the Atmel product.
For details, see Operating Modes (for hardware operation) or Software Product Identification.
The manufacturer and device code is the same for both modes.
DATA POLLING: The AT49F040A features DATA
polling to indicate the end of a program
cycle. During a program cycle an attempted read of the last byte loaded will result in the com-
plement of the loaded data on I/O7. Once the program cycle has been completed, true data is
valid on all outputs and the next cycle may begin. DATA
polling may begin at any time during
the program cycle.
TOGGLE BIT: In addition to DATA polling the AT49F040A provides another method for deter-
mining the end of a program or erase cycle. During a program or erase operation, successive
attempts to read data from the device will result in I/O6 toggling between one and zero. Once
the program cycle has completed, I/O6 will stop toggling and valid data will be read. Examin-
ing the toggle bit may begin at any time during a program cycle.
HARDWARE DATA PROTECTION: Hardware features protect against inadvertent programs
to the AT49F040A in the following ways: (a) V
CC
sense: if V
CC
is below 3.8V (typical), the pro-
gram function is inhibited. (b) Program inhibit: holding any one of OE
low, CE high or WE high
inhibits program cycles. (c) Noise filter: pulses of less than 15 ns (typical) on the WE
or CE
inputs will not initiate a program cycle.
5
AT49F040A
3359A–FLASH–6/03
Notes: 1. The DATA FORMAT in each bus cycle is as follows: I/O7 - I/O0 (Hex). The address format in each bus cycle is as follows:
A11 - A0 (Hex); A11 - A18 (don’t care).
2. Since A11 is don’t care, AAA can be replaced with 2AA.
3. The 16K byte boot sector has the address range 00000H to 03FFFH.
4. Either one of the Product ID Exit commands can be used.
5. SA = sector addresses:
SA = 00000 to 03FFF for BOOT BLOCK
SA = 04000 to 05FFF for PARAMETER BLOCK 1
SA = 06000 to 07FFF for PARAMETER BLOCK 2
SA = 08000 to FFFF for MAIN MEMORY ARRAY BLOCK 1
SA = 10000 to 1FFFF for MAIN MEMORY ARRAY BLOCK 2
SA = 20000 to 2FFFF for MAIN MEMORY ARRAY BLOCK 3
SA = 30000 to 3FFFF for MAIN MEMORY ARRAY BLOCK 4
SA = 40000 to 4FFFF for MAIN MEMORY ARRAY BLOCK 5
SA = 50000 to 5FFFF for MAIN MEMORY ARRAY BLOCK 6
SA = 60000 to 6FFFF for MAIN MEMORY ARRAY BLOCK 7
SA = 70000 to 7FFFF for MAIN MEMORY ARRAY BLOCK 8
Command Definition (in Hex)
(1)
Command
Sequence
Bus
Cycles
1st Bus
Cycle
2nd Bus
Cycle
3rd Bus
Cycle
4th Bus
Cycle
5th Bus
Cycle
6th Bus
Cycle
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
Read
1 Addr D
OUT
Chip Erase 6 555 AA AAA
(2)
55 555 80 555 AA AAA 55 555 10
Sector Erase 6 555 AA AAA 55 555 80 555 AA AAA 55 SA
(5)
30
Byte Program 4 555 AA AAA 55 555 A0 Addr D
IN
Boot Block Lockout
(3)
6 555 AA AAA 55 555 80 555 AA AAA 55 555 40
Product ID Entry 3 555 AA AAA 55 555 90
Product ID Exit
(4)
3 555 AA AAA 55 555 F0
Product ID Exit
(4)
1 XXXX F0
Absolute Maximum Ratings*
Temperature Under Bias................................ -55°C to +125°C
*NOTICE: Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions beyond those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect device reliability.
Storage Temperature ..................................... -65°C to +150°C
All Input Voltages
(including NC Pins)
with Respect to Ground ...................................-0.6V to +6.25V
All Output Voltages
with Respect to Ground .............................-0.6V to V
CC
+ 0.6V
Voltage on OE
with Respect to Ground ...................................-0.6V to +13.5V
6
AT49F040A
3359A–FLASH–6/03
Notes: 1. X can be V
IL
or V
IH.
2. Refer to AC Programming Waveforms.
3. V
H
= 12.0V ± 0.5V.
4. Manufacturer Code: 1FH, Device Code: 13H.
5. See details under Software Product Identification Entry/Exit.
Note: 1. In the erase mode, I
CC
is 90 mA.
DC and AC Operating Range
AT49F040A-55 AT49F040A-70
Operating Temperature (Case) Ind. -40° C - 85° C -40° C - 85° C
V
CC
Power Supply 5V ± 10% 5V ± 10%
Operating Modes
Mode CE OE WE
Ai
I/O
Read V
IL
V
IL
V
IH
Ai D
OUT
Program/Erase
(2)
V
IL
V
IH
V
IL
Ai D
IN
Standby/Write Inhibit V
IH
X
(1)
X X High Z
Program Inhibit
X X V
IH
X V
IL
X
Output Disable X V
IH
X High Z
Reset X X X X High Z
Product Identification
Hardware V
IL
V
IL
V
IH
A1 - A18 = V
IL
, A9 = V
H
,
(3)
A0 = V
IL
Manufacturer Code
(4)
A1 - A18 = V
IL
, A9 = V
H,
(3)
A0 = V
IH
Device Code
(4)
Software
(5)
A0 = V
IL
, A1 - A18 =V
IL
Manufacturer Code
(4)
A0 = V
IH
, A1 - A18 =V
IL
Device Code
(4)
DC Characteristics
Symbol Parameter Condition Min Max Units
I
LI
Input Load Current V
IN
= 0V to V
CC
10 µA
I
LO
Output Leakage Current V
I/O
= 0V to V
CC
10 µA
I
SB1
V
CC
Standby Current CMOS CE = V
CC
- 0.3V to V
CC
70 µA
I
SB2
V
CC
Standby Current TTL CE = 2.0V to V
CC
1mA
I
CC
(1)
V
CC
Active Current f = 5 MHz; I
OUT
= 0 mA 20 mA
V
IL
Input Low Voltage 0.8 V
V
IH
Input High Voltage 2.0 V
V
OL
Output Low Voltage I
OL
= 2.1 mA 0.45 V
V
OH1
Output High Voltage I
OH
= -400 µA 2.4 V
V
OH2
Output High Voltage CMOS I
OH
= -100 µA; V
CC
= 4.5V 4.2 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

AT49F040A-70PI

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IC FLASH 4M PARALLEL 32DIP
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