ATMEL AT29C1024 1 megabit 64k x 16 5-volt only cmos flash memory Datasheet

AT29C1024
Features
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Fast Read Access Time - 70 ns
5-Volt-Only Reprogramming
Sector Program Operation
Single Cycle Reprogram (Erase and Program)
512 Sectors (128 words/sector)
Internal Address and Data Latches for 128 Words
Internal Program Control and Timer
Hardware and Software Data Protection
Fast Sector Program Cycle Time - 10 ms
DATA Polling for End of Program Detection
Low Power Dissipation
60 mA Active Current
200 µA CMOS Standby Current
Typical Endurance > 10,000 Cycles
Single 5V ±10% Supply
CMOS and TTL Compatible Inputs and Outputs
Commercial and Industrial Temperature Ranges
1 Megabit
(64K x 16)
5-volt Only
CMOS Flash
Memory
Description
The AT29C1024 is a 5-volt-only in-system Flash programmable and erasable read
only memory (PEROM). Its 1 megabit of memory is organized as 65,536 words by 16
bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device
offers access times to 70 ns with power dissipation of just 330 mW. When the device
is deselected, the CMOS standby current is less than 200 µA. The device endurance
is such that any sector can typically be written to in excess of 10,000 times.
(continued)
Pin Configurations
Pin Name
Function
A0 - A15
Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O15
Data
Inputs/Outputs
NC
No Connect
DC
Don’t Connect
AT29C1024
TSOP Top View
PLCC Top View
Type 1
0571A
4-141
Description (Continued)
To allow for simple in-system reprogrammability, the
AT29C1024 does not require high input voltages for programming. Five-volt-only commands determine the operation of the device. Reading data out of the device is similar
to reading from an EPROM. Reprogramming the
AT29C1024 is performed on a sector basis; 128 words of
data are loaded into the device and then simultaneously
programmed.
Block Diagram
During a reprogram cycle, the address locations and 128
words of data are internally latched, freeing the address
and data bus for other operations. Following the initiation
of a program cycle, the device will automatically erase the
sector and then program the latched data using an internal
control timer. The end of a program cycle can be detected
by DATA polling of I/O7 or I/O15. Once the end of a program cycle has been detected, a new access for a read or
program can begin.
Device Operation
READ: The AT29C1024 is accessed like an EPROM.
When CE and OE are low and WE is high, the data stored
at the memory location determined by the address pins is
asserted on the outputs. The outputs are put in the high
impedance state whenever CE or OE is high. This dualline control gives designers flexibility in preventing bus
contention.
address. The sector address must be valid during each
high to low transition of WE (or CE). A0 to A6 specify the
word address within the sector. The words may be loaded
in any order; sequential loading is not required. Once a
programming operation has been initiated, and for the duration of tWC, a read operation will effectively be a polling
operation.
DATA LOAD: Data loads are used to enter the 128
words of a sector to be programmed or the software codes
for data protection. A data load is performed by applying a
low pulse on the WE or CE input with CE or WE low (respectively) and OE high. The address is latched on the
falling edge of CE or WE, whichever occurs last. The data
is latched by the first rising edge of CE or WE.
SOFTWARE DATA PROTECTION: A software controlled data protection feature is available on the AT29C1024.
Once the software protection is enabled a software algorithm must be issued to the device before a program may
be performed. The software protection feature may be enabled or disabled by the user; when shipped from Atmel,
the software data protection feature is disabled. To enable
the software data protection, a series of three program
commands to specific addresses with specific data must
be performed. After the software data protection is enabled the same three program commands must begin
each program cycle in order for the programs to occur. All
software program commands must obey the sector program timing specifications. Once set, software data protection will remain active unless the disable command sequence is issued. Power transitions will not reset the software data protection feature, however the software feature will guard against inadvertent program cycles during
power transitions.
(continued)
PROGRAM: The device is reprogrammed on a sector
basis. If a word of data within a sector is to be changed,
data for the entire sector must be loaded into the device.
Any word that is not loaded during the programming of its
sector will be erased to read FFH. Once the words of a
sector are loaded into the device, they are simultaneously
programmed during the internal programming period. After the first data word has been loaded into the device,
successive words are entered in the same manner. Each
new word to be programmed must have its high to low
transition on WE (or CE) within 150 µs of the low to high
transition of WE (or CE) of the preceding word. If a high to
low transition is not detected within 150 µs of the last low
to high transition, the load period will end and the internal
programming period will start. A7 to A15 specify the sector
4-142
AT29C1024
AT29C1024
Device Operation (Continued)
After setting SDP, any attempt to write to the device without the 3-word command sequence will start the internal
write timers. No data will be written to the device; however,
for the duration of tWC, a read operation will effectively be
a polling operation.
After the software data protection’s 3-word command
code is given, a sector of data is loaded into the device
using the sector programming timing specifications.
HARDWARE DATA PROTECTION: Hardware features
protect against inadvertent programs to the AT29C1024 in
the following ways: (a) VCC sense— if VCC is below 3.8V
(typical), the program function is inhibited. (b) VCC power
on delay— once VCC has reached the VCC sense level,
the device will automatically time out 5 ms (typical) before
programming. (c) Program inhibit— holding any one of OE
low, CE high or WE high inhibits program cycles. (d) Noise
filter— pulses of less than 15 ns (typical) on the WE or CE
inputs will not initiate a program cycle.
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 programmer to identify the correct programming algorithm for the Atmel product. In addition, users may wish
to use the software product identification mode to identify
the part (i.e. using the device code), and have the system
software use the appropriate sector size for program op-
erations. In this manner, the user can have a common
board design for various Flash densities and, with each
density’s sector size in a memory map, have the system
software apply the appropriate sector size.
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 AT29C1024 features DATA polling to indicate the end of a program cycle. During a program cycle an attempted read of the last word loaded will
result in the complement of the loaded data on I/O7 and
I/O15. 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: I n a d d i t i o n t o DATA p o l l i n g t h e
AT29C1024 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 and I/O14 toggling between
one and zero. Once the program cycle has completed,
I/O6 and I/O14 will stop toggling and valid data will be
read. Examining the toggle bit may begin at any time during a program cycle.
OPTIONAL CHIP ERASE MODE: The entire device
can be erased by using a 6-byte software code. Please
see Software Chip Erase application note for details.
Absolute Maximum Ratings*
Temperature Under Bias................. -55°C to +125°C
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 VCC + 0.6V
Voltage on OE
with Respect to Ground ................... -0.6V to +13.5V
*NOTICE: Stresses beyond those listed under “Absolute Maximum 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 conditions beyond those indicated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
4-143
DC and AC Operating Range
AT29C1024-70
Com.
Operating
Temperature (Case)
Ind.
AT29C1024-90
AT29C1024-12
AT29C1024-15
0°C - 70°C
0°C - 70°C
0°C - 70°C
0°C - 70°C
-40°C - 85°C
-40°C - 85°C
-40°C - 85°C
-40°C - 85°C
5V ± 5%
5V ± 10%
5V ± 10%
5V ± 10%
VCC Power Supply
Operating Modes
Mode
CE
OE
WE
Ai
I/O
Read
VIL
VIL
VIH
Ai
DOUT
Program (2)
VIL
VIH
VIL
Ai
DIN
5V Chip Erase
VIL
VIH
VIL
Ai
X
X
Standby/Write Inhibit
VIH
X
(1)
Program Inhibit
X
X
VIH
Program Inhibit
X
VIL
X
Output Disable
X
VIH
X
High Z
High Z
Product Identification
Hardware
VIL
VIL
A1 - A15 = VIL, A9 = VH, (3)
A0 = VIL
A1 - A15 = VIL, A9 = VH, (3)
A0 = VIH
A0 = VIL
VIH
Software (5)
Device Code (4)
Manufacturer Code (4)
Device Code (4)
A0 = VIH
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
Manufacturer Code (4)
4. Manufacturer Code: 1F, Device Code: 25
5. See details under Software Product Identification Entry/Exit.
DC Characteristics
Max
Units
ILI
Symbol
Input Load Current
Parameter
VIN = 0V to VCC
Condition
Min
10
µA
ILO
Output Leakage Current
VI/O = 0V to VCC
10
µA
ISB1
VCC Standby Current CMOS
CE = VCC - 0.3V to VCC
Com.
200
µA
Ind.
200
µA
ISB2
VCC Standby Current TTL
CE = 2.0V to VCC
3
mA
ICC
VCC Active Current
f = 5 MHz; IOUT = 0 mA
60
mA
VIL
Input Low Voltage
0.8
V
VIH
Input High Voltage
2.0
V
VOL
Output Low Voltage
IOL = 2.1 mA
VOH1
Output High Voltage
IOH = -400 µA
2.4
V
VOH2
Output High Voltage CMOS
IOH = -100 µA; VCC = 4.5V
4.2
V
4-144
AT29C1024
.45
V
AT29C1024
AC Read Characteristics
AT29C1024-70 AT29C1024-90 AT29C1024-12 AT29C1024-15
Max
Units
120
150
ns
120
150
ns
0
70
ns
0
40
ns
Symbol
Parameter
tACC
Address to Output Delay
70
90
tCE (1)
CE to Output Delay
70
90
tOE (2)
OE to Output Delay
0
35
0
45
0
60
tDF (3, 4)
CE or OE to Output Float
0
25
0
25
0
30
tOH
Output Hold from OE, CE
or Address, whichever
occurred first
0
Min
Max
Min
Max
0
Min
Max
0
Min
0
ns
AC Read Waveforms (1, 2, 3, 4)
Notes: 1. CE may be delayed up to tACC - tCE after the address
transition without impact on tACC .
2. OE may be delayed up to tCE - tOE after the falling
edge of CE without impact on tCE or by tACC - tOE
after an address change without impact on tACC .
3. tDF is specified from OE or CE whichever occurs first
(CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
Input Test Waveforms and
Measurement Level
Output Test Load
70 ns
90/120/150 ns
tR, tF < 5 ns
Pin Capacitance (f = 1 MHz, T = 25°C) (1)
Typ
Max
Units
CIN
4
6
pF
VIN = 0V
COUT
8
12
pF
VOUT = 0V
Note:
Conditions
1. This parameter is characterized and is not 100% tested.
4-145
AC Word Load Characteristics
Symbol
Parameter
tAS, tOES
Address, OE Set-up Time
0
ns
tAH
Address Hold Time
50
ns
tCS
Chip Select Set-up Time
0
ns
tCH
Chip Select Hold Time
0
ns
tWP
Write Pulse Width (WE or CE)
70
ns
tDS
Data Set-up Time
50
ns
tDH, tOEH
Data, OE Hold Time
0
ns
tWPH
Write Pulse Width High
100
ns
AC Word Load Waveforms
WE Controlled
CE Controlled
4-146
AT29C1024
Min
Max
Units
AT29C1024
Program Cycle Characteristics
Symbol
Parameter
Min
Max
Units
tWC
Write Cycle Time
10
ms
tAS
Address Set-up Time
0
ns
tAH
Address Hold Time
50
ns
tDS
Data Set-up Time
50
ns
tDH
Data Hold Time
0
ns
tWP
Write Pulse Width
70
ns
tWLC
Word Load Cycle Time
tWPH
Write Pulse Width High
150
100
µs
ns
Program Cycle Waveforms (1, 2, 3)
Notes: 1. A7 through A15 must specify the sector address
during each high to low transition of WE (or CE).
2. OE must be high when WE and CE are both low.
3. All words that are not loaded within the sector being
programmed will be indeterminate.
4-147
Software Data
(1)
Protection Enable Algorithm
Software Data
(1)
Protection Disable Algorithm
LOAD DATA AAAA
TO
ADDRESS 5555
LOAD DATA AAAA
TO
ADDRESS 5555
LOAD DATA 5555
TO
ADDRESS 2AAA
LOAD DATA 5555
TO
ADDRESS 2AAA
LOAD DATA A0A0
TO
ADDRESS 5555
LOAD DATA 8080
TO
ADDRESS 5555
WRITES ENABLED
LOAD DATA AAAA
TO
ADDRESS 5555
LOAD DATA
TO
(4) ENTER DATA
SECTOR (128 WORDS)
(2)
PROTECT STATE
Notes for software program code:
1. Data Format: I/O15 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Write Protect state will be activated at end of write period
even if no other data is loaded.
3. Write Protect state will be deactivated at end of write period
even if no other data is loaded.
4. 128 words of data MUST BE loaded.
LOAD DATA 5555
TO
ADDRESS 2AAA
LOAD DATA 2020
TO
ADDRESS 5555
LOAD DATA XXXX
TO
(4)
SECTOR (128 WORDS)
EXIT DATA
PROTECT STATE
(3)
Software Protected Program Cycle Waveform (1, 2, 3)
Notes: 1. A7 through A15 must specify the same page address
during each high to low transition of WE (or CE) after
the software code has been entered.
4-148
AT29C1024
2. OE must be high when WE and CE are both low.
3. All words that are not loaded within the sector being
programmed will be indeterminate.
AT29C1024
Data Polling Characteristics
(1)
Symbol
Parameter
Min
Typ
Max
tDH
Data Hold Time
0
ns
tOEH
OE Hold Time
0
ns
Delay (2)
tOE
OE to Output
tWR
Write Recovery Time
Units
ns
0
ns
Notes: 1. These parameters are characterized and not 100% tested.
2. See tOE spec in AC Read Characteristics.
Data Polling Waveforms
Toggle Bit Characteristics
Symbol
Parameter
tDH
Data Hold Time
tOEH
OE Hold Time
(1)
Min
Typ
OE to Output Delay
tOEHP
OE High Pulse
tWR
Write Recovery Time
Units
10
ns
10
ns
(2)
tOE
Max
ns
150
ns
0
ns
Notes: 1. These parameters are characterized and not 100% tested.
2. See tOE spec in AC Read Characteristics.
Toggle Bit Waveforms (1, 2, 3)
Notes: 1. Toggling either OE or CE or both OE and CE will
operate toggle bit.
2. Beginning and ending state of I/O6 and I/O14
may vary.
3. Any address location may be used but the address
should not vary.
4-149
Software Product (1)
Identification Entry
Software Product (1)
Identification Exit
LOAD DATA AAAA
TO
ADDRESS 5555
LOAD DATA AAAA
TO
ADDRESS 5555
LOAD DATA 5555
TO
ADDRESS 2AAA
LOAD DATA 5555
TO
ADDRESS 2AAA
LOAD DATA 9090
TO
ADDRESS 5555
LOAD DATA F0F0
TO
ADDRESS 5555
PAUSE 10 mS
ENTER PRODUCT
IDENTIFICATION
(2, 3, 5)
MODE
Notes for software product identification:
1. Data Format: I/O15 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. A1 - A15 = VIL.
Manufacture Code is read for A0 = VIL;
Device Code is read for A0 = VIH.
3. The device does not remain in identification mode if
powered down.
4. The device returns to standard operation mode.
5. Manufacturer Code: 1F
Device Code: 25
4-150
AT29C1024
PAUSE 10 mS
EXIT PRODUCT
IDENTIFICATION
(4)
MODE
AT29C1024
4-151
Ordering Information
tACC
ICC (mA)
Ordering Code
Package
0.1
AT29C1024-70JC
AT29C1024-70TC
44J
48T
Commercial
(0° to 70°C)
60
0.3
AT29C1024-70JI
AT29C1024-70TI
44J
48T
Industrial
(-40° to 85°C)
60
0.1
AT29C1024-90JC
AT29C1024-90TC
44J
48T
Commercial
(0° to 70°C)
60
0.3
AT29C1024-90JI
AT29C1024-90TI
44J
48T
Industrial
(-40° to 85°C)
60
0.1
AT29C1024-12JC
AT29C1024-12TC
44J
48T
Commercial
(0° to 70°C)
60
0.3
AT29C1024-12JI
AT29C1024-12TI
44J
48T
Industrial
(-40° to 85°C)
60
0.1
AT29C1024-15JC
AT29C1024-15TC
44J
48T
Commercial
(0° to 70°C)
60
0.3
AT29C1024-15JI
AT29C1024-15TI
44J
48T
Industrial
(-40° to 85°C)
(ns)
Active
Standby
70
60
90
120
150
Package Type
44J
44 Lead, Plastic J-Leaded Chip Carrier (PLCC)
48T
48 Lead, Thin Small Outline Package (TSOP)
4-152
AT29C1024
Operation Range
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