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AT49F002T-90PI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
AT49F002(N)(T)
4
range of the boot block is 3C000 to 3FFFF for the
AT49F002(N)T.
Once the feature is enabled, the data in the boot block can
no longer be erased or programmed with input voltage lev-
els of 5.5V or less. 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 com-
mands to specific addresses with specific data must be
performed. Please refer to the Command Definitions table.
BOOT BLOCK LOCKOUT DETECTION: A software
method is available to determine if programming of the boot
block section is locked out. When the device is in the soft-
ware 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 for the AT49F002(N), and a read from address
location 3C002H will show if programming the boot block is
locked out for AT49F002(N)T. 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.
BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE:
The user can override the boot block programming lockout
by taking the RESET
pin to 12 volts. By doing this, pro-
tected boot block data can be altered through a chip erase,
sector erase or word programming. When the RESET
pin is
brought back to TTL levels the boot block programming
lockout feature is again active. This feature is not available
on the AT49F002N(T).
PRODUCT IDENTIFICATION: The product identification
mode identifies the device and manufacturer as Atmel. It
may be accessed by hardware or software operation. The
hardware operation mode can be used by an external pro-
grammer 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 AT49F002(N)(T) features DATA
poll-
ing to indicate the end of a program cycle. During a pro-
gram cycle an attempted read of the last byte loaded will
result in the complement 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
AT49F002(N)(T) provides another method for determining
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 tog-
gling and valid data will be read. Examining the toggle bit
may begin at any time during a program cycle.
HARDWARE DATA PROTECTION: Hardware features
protect against inadvertent programs to the
AT49F002(N)(T) in the following ways: (a) V
CC
sense: if
V
CC
is below 3.8V (typical), the program function is inhib-
ited. (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.
AT49F002(N)(T)
5
Notes: 1. The DATA FORMAT in each bus cycle is as follows: I/O7 - I/O0 (Hex)
2. The 16K byte boot sector has the address range 00000H to 03FFFH for the AT49F002(N) and 3C000H to 3FFFFH for the
AT49F002(N)T
3. Either one of the Product ID Exit commands can be used.
4. SA = sector addresses:
For the AT49F002(N):
SA = 00000 to 03FFF for BOOT BLOCK
Nothing will happen and the device goes back to the read mode in 100 ns
SA = 04000 to 05FFF for PARAMETER BLOCK 1
SA = 06000 to 07FFF for PARAMETER BLOCK 2
SA = 08000 to 1FFFF for MAIN MEMORY ARRAY BLOCK 1
This command will erase - PB1, PB2 and MMB1
SA = 20000 to 3FFFF for MAIN MEMORY ARRAY BLOCK 2
For the AT49F002(N)T:
SA = 3C000 to 3FFFF for BOOT BLOCK
Nothing will happen and the device goes back to the read mode in 100 ns
SA = 3A000 to 3BFFF for PARAMETER BLOCK 1
SA = 38000 to 39FFF for PARAMETER BLOCK 2
SA = 20000 to 37FFF for MAIN MEMORY ARRAY BLOCK 1
This command will erase - PB1, PB2 and MMB1
SA = 00000 to IFFFF for MAIN MEMORY ARRAY BLOCK 2
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 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 10
Sector Erase 6 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 SA
(4)
30
Byte Program 4 5555 AA 2AAA 55 5555 A0 Addr D
IN
Boot Block Lockout
(2)
6 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 40
Product ID Entry 3 5555 AA 2AAA 55 5555 90
Product ID Exit
(3)
3 5555 AA 2AAA 55 5555 F0
Product ID Exit
(3)
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
AT49F002(N)(T)
6
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: 07H - AT49F002(N), 08H - AT49F002(N)T
5. See details under Software Product Identification Entry/Exit.
6. This pin is not available on the AT49F002N(T).
Note: 1. In the erase mode, I
CC
is 90 mA.
DC and AC Operating Range
AT49F002(N)(T)-55 AT49F002(N)(T)-70 AT49F002(N)(T)-90 AT49F002(N)(T)-12
Operating
Temperature (Case)
Com. 0
°C - 70°C0°C - 70°C0°C - 70°C0°C - 70°C
Ind. -40
°C - 85°C-40°C - 85°C-40°C - 85°C-40°C - 85°C
V
CC
Power Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%
Operating Modes
Mode CE OE WE RESET
(6)
Ai
I/O
Read V
IL
V
IL
V
IH
V
IH
Ai D
OUT
Program/Erase
(2)
V
IL
V
IH
V
IL
V
IH
Ai D
IN
Standby/Write Inhibit V
IH
X
(1)
XV
IH
X High Z
Program Inhibit
XXV
IH
V
IH
XV
IL
XV
IH
Output Disable X V
IH
XV
IH
High Z
Reset XXX V
IL
X High Z
Product Identification
Hardware V
IL
V
IL
V
IH
A1 - A17 = V
IL
, A9 = V
H
,
(3)
A0 = V
IL
Manufacturer Code
(4)
A1 - A17 = V
IL
, A9 = V
H,
(3)
A0 = V
IH
Device Code
(4)
Software
(5)
A0 = V
IL
, A1 - A17=V
IL
Manufacturer Code
(4)
A0 = V
IH
, A1 - A17=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
Com. 100 µA
Ind. 300 µA
I
SB2
V
CC
Standby Current TTL CE = 2.0V to V
CC
3mA
I
CC
(1)
V
CC
Active Current f = 5 MHz; I
OUT
= 0 mA 50 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

AT49F002T-90PI

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