ATMEL AT28C010-12DK Space 1-megabit (128k x 8) paged parallel eeprom Datasheet

Features
• Fast Read Access Time – 120 ns
• Automatic Page Write Operation
•
•
•
•
•
•
•
•
•
•
– Internal Address and Data Latches for 128 Bytes
– Internal Control Timer
Fast Write Cycle Time
– Page Write Cycle Time – 10 ms Maximum
– 1 to 128-byte Page Write Operation
Low Power Dissipation
– 80 mA Active Current
– 300 µA CMOS Standby Current
Hardware and Software Data Protection
DATA Polling for End of Write Detection
High Reliability CMOS Technology
– Endurance: 104 or 105 Cycles
– Data Retention: 10 Years
Operating Range: 4.5V to 5.5V, -55 to +125°C
CMOS and TTL Compatible Inputs and Outputs
Batch Tested for 10 Krad TID and 70 MeV Latch-up Capability
JEDEC Approved byte-Wide Pinout
435 Mils Wide 32-Pin Flat Pack Package
Description
The AT28C010-12DK is a high-performance Electrically Erasable and Programmable
Read-Only Memory. Its one megabit of memory is organized as 131,072 words by 8
bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device
offers access times to 120 ns with power dissipation of just 440 mW. When the device
is deselected, the CMOS standby current is less than 300 µA.
The AT28C010-12DK is accessed like a Static RAM for the read or write cycle without
the need for external components. The device contains a 128-byte page register to
allow writing of up to 128 bytes simultaneously. During a write cycle, the address and
1 to 128 bytes of data are internally latched, freeing the address and data bus for
other operations. Following the initiation of a write cycle, the device will automatically
write the latched data using an internal control timer. The end of a write cycle can be
detected by DATA POLLING of I/O7. Once the end of a write cycle has been detected
a new access for a read or write can begin.
AT28C010-12DK Mil
Space
1-megabit
(128K x 8)
Paged Parallel
EEPROMs
AT28C010-12DK
Preliminary
Atmel's 28C010 has additional features to ensure high quality in manufacturing. The
device utilizes internal error correction for extended endurance and improved data
retention characteristics. An optional software data protection mechanism is available
to guard against inadvertent writes. The device also includes an extra 128 bytes of
EEPROM for device identification or tracking.
Rev. 4259A–AERO–06/03
1
Pin Configuration
Pin Name
Function
A0 - A16
Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O7
Data Inputs/Outputs
NC
No Connect
FLATPACK
Top View
A16
A15
A12
A7
A6
NC
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VCC
NC
WE
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
Block Diagram
2
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Device Operation
•
READ: The AT28C010-12DK is accessed like a Static RAM. 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 when either CE or OE is high. This dual-line control gives designers flexibility
in preventing bus contention in their system.
•
BYTE WRITE: A low pulse on the WE or CE input with CE or WE low (respectively)
and OE high initiates a write cycle. 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. Once a byte write has been started it will automatically time itself to completion.
Once a programming operation has been initiated and for the duration of tWC, a read
operation will effectively be a polling operation.
•
PAGE WRITE: The page write operation of the AT28C010-12DK allows 1 to 128
bytes of data to be written into the device during a single internal programming
period. A page write operation is initiated in the same manner as a byte write; the
first byte written can then be followed by 1 to 127 additional bytes. Each successive
byte must be written within 150 µs (tBLC) of the previous byte. If the tBLC limit is
exceeded the AT28C010-12DK will cease accepting data and commence the
internal programming operation. All bytes during a page write operation must reside
on the same page as defined by the state of the A7 - A16 inputs. For each WE high
to low transition during the page write operation, A7 - A16 must be the same.
•
The A0 to A6 inputs are used to specify which bytes within the page are to be
written. The bytes may be loaded in any order and may be altered within the same
load period. Only bytes which are specified for writing will be written; unnecessary
cycling of other bytes within the page does not occur.
•
DATA POLLING: The AT28C010-12DK features DATA Polling to indicate the end of
a write cycle. During a byte or page write cycle an attempted read of the last byte
written will result in the complement of the written data to be presented on I/O7.
Once the write cycle has been completed, true data is valid on all outputs, and the
next write cycle may begin. DATA Polling may begin at anytime during the write
cycle.
•
TOGGLE BIT: In addition to DATA Polling the AT28C010-12DK provides another
method for determining the end of a write cycle. During the write operation,
successive attempts to read data from the device will result in I/O6 toggling between
one and zero. Once the write has completed, I/O6 will stop toggling and valid data
will be read. Reading the toggle bit may begin at any time during the write cycle.
•
DATA PROTECTION: If precautions are not taken, inadvertent writes may occur
during transitions of the host system power supply. Atmel has incorporated both
hardware and software features that will protect the memory against inadvertent
writes.
•
HARDWARE PROTECTION: Hardware features protect against inadvertent writes
to the AT28C010-12DK in the following ways: (a) VCC sense – if VCC is below 3.8V
(typical) the write function is inhibited; (b) VCC power-on delay – once VCC has
reached 3.8V the device will automatically time out 5 ms (typical) before allowing a
write: (c) write inhibit - holding any one of OE low, CE high or WE high inhibits write
cycles; (d) noise filter - pulses of less than 15 ns (typical) on the WE or CE inputs
will not initiate a write cycle.
•
SOFTWARE DATA PROTECTION: A software controlled data protection feature
has been implemented on the AT28C010-12DK. When enabled, the software data
protection (SDP), will prevent inadvertent writes. The SDP feature may be enabled
or disabled by the user; the AT28C010-12DK is shipped from Atmel with SDP
disabled.
3
4259A–AERO–06/03
•
SDP is enabled by the host system issuing a series of three write commands; three
specific bytes of data are written to three specific addresses (refer to Software Data
Protection Algorithm). After writing the 3-byte command sequence and after tWC the
entire AT28C010-12DK will be protected against inadvertent write operations. It
should be noted, that once protected the host may still perform a byte or page write
to the AT28C010-12DK. This is done by preceding the data to be written by the
same 3-byte command sequence used to enable SDP.
•
Once set, SDP will remain active unless the disable command sequence is issued.
Power transitions do not disable SDP and SDP will protect the AT28C010-12DK
during power-up and power-down conditions. All command sequences must
conform to the page write timing specifications. The data in the enable and disable
command sequences is not written to the device and the memory addresses used in
the sequence may be written with data in either a byte or page write operation.
•
After setting SDP, any attempt to write to the device without the 3-byte command
sequence will start the internal write timers. No data will be written to the device;
however, for the duration of tWC, read operations will effectively be polling
operations.
•
DEVICE IDENTIFICATION: An extra 128 bytes of EEPROM memory are available
to the user for device identification. By raising A9 to 12V ± 0.5V and using address
locations 1FF80H to 1FFFFH the bytes may be written to or read from in the same
manner as the regular memory array.
•
OPTIONAL CHIP ERASE MODE: The entire device can be erased using a 6-byte
software code. Please see Software Chip Erase application note for details.
DC and AC Operating
Range
AT28C010-12DK-12
Operating
Temperature (Case)
Mil.
-55°C - 125°C
5V ± 10%
VCC Power Supply
Operating Modes
Mode
CE
OE
WE
I/O
Read
VIL
VIL
VIH
DOUT
VIL
VIH
VIL
DIN
High Z
(2)
Write
Standby/Write Inhibit
(1)
VIH
X
X
Write Inhibit
X
X
VIH
Write Inhibit
X
VIL
X
Output Disable
X
VIH
X
Notes:
4
High Z
1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Electrical Characteristics
Absolute Maximum Ratings*
Temperature Under Bias................................ -55°C to +125°C
*NOTICE:
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
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.
Voltage on OE and A9
with Respect to Ground ...................................-0.6V to +13.5V
DC Characteristics
Symbol
Parameter
Condition
ILI
Input Load Current
ILO
Min
Max
Units
VIN = 0V to VCC + 1V
10
µA
Output Leakage Current
VI/O = 0V to VCC
10
µA
ISB1
VCC Standby Current CMOS
CE = VCC - 0.3V to VCC + 1V
300
µA
ISB2
VCC Standby Current TTL
CE = 2.0V to VCC + 1V
3
mA
ICC
VCC Active Current
f = 5 MHz; IOUT = 0 mA
80
mA
VIL
Input Low Voltage
0.8
V
VIH
Input High Voltage
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
2.0
V
0.45
V
5
4259A–AERO–06/03
AC Read Characteristics
Symbol
Parameter
AT28C010-12DK
Min
tACC
Units
Max
Address to Output Delay
120
ns
(1)
CE to Output Delay
120
ns
(2)
OE to Output Delay
0
50
ns
tDF(3, 4)
CE or OE to Output Float
0
50
ns
tOH
Output Hold from OE, CE or Address, whichever occurred
first
0
tCE
tOE
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 in tACC.
3. tDF is specified from OE or CE wichever occurs first (CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
6
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Input Test Waveforms and Measurement Level
Output Test Load
Pin Capacitance
f = 1 MHz, T = 25°C(1)
Symbol
Typ
Max
Units
Conditions
CIN
4
10
pF
VIN = 0V
COUT
8
12
pF
VOUT = 0V
Note:
1. This parameter is 100% characterized and is not 100% tested.
AC Write Characteristics
Symbol
Parameter
Min
Max
Units
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)
100
ns
tDS
Data Set-up Time
50
ns
tDH, tOEH
Data, OE Hold Time
0
ns
7
4259A–AERO–06/03
AC Write Waveforms
WE Controlled
CE Controlled
Page Mode Characteristics
Symbol
Parameter
tWC
Write Cycle Time
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
100
ns
tBLC
Byte Load Cycle Time
tWPH
Write Pulse Width High
8
Min
Max
Units
10
ms
150
50
µs
ns
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Page Mode Write Waveforms (1)(2)
Notes:
1. A7 through A16 must specify the page address during each high to low transition of WE (or CE).
2. OE must be high only when WE and CE are both low.
9
4259A–AERO–06/03
Chip Erase Waveforms
tS = 5 msec (min.)
tW = tH = 10 msec (min.)
VH = 12.0V ± 0.5V
Software Data
Figure 1. Protection Enable Algorithm(1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
WRITES ENABLED(2)
LOAD DATA XX
TO
ANY ADDRESS(3)
LOAD LAST BYTE
TO
LAST ADDRESS
Notes:
ENTER DATA
PROTECT STATE
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Write Protect state will be activated at end of write even if no other data is loaded.
3. 1 to 128 bytes of data are loaded.
10
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Figure 2. Protection Disable Algorithm(1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 80
TO
ADDRESS 5555
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 20
TO
ADDRESS 5555
EXIT DATA
PROTECT STATE(3)
LOAD DATA XX
TO
ANY ADDRESS(4)
LOAD LAST BYTE
TO
LAST ADDRESS
Notes:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Write Protect state will be activated at end of write even if no other data is loaded.
3. Write Protect state will be deactivated at end of write period even if no other data if
loaded.
4. 1 to 128 bytes of data are loaded.
11
4259A–AERO–06/03
Software Protected Program Cycle Waveform(1)(2)(3)
Notes:
1. A0 - A14 must conform to the addressing sequence for the first 3 bytes as shown above.
2. After the command sequence has been issued and a page write operation follows, the page address inputs (A7 - A16) must
be the same for each high to low transition of WE (or CE).
3. OE must be high only when WE and CE are both low.
Data Polling Characteristics(1)
Symbol
Parameter
tDH
Data Hold Time
tOEH
OE Hold Time
Min
OE to Output Delay
tWR
Write Recovery Time
Notes:
12
Max
Units
10
ns
10
ns
(2)
tOE
Typ
ns
0
ns
1. These parameters are characterized and not 100% tested.
2. See AC Read Characteristics.
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Data Polling Waveforms
Toggle Bit Characteristics(1)
Symbol
Parameter
tDH
Data Hold Time
tOEH
OE Hold Time
Min
OE to Output Delay
tOEHP
OE High Pulse
tWR
Write Recovery Time
Notes:
Max
Units
10
ns
10
ns
(2)
tOE
Typ
ns
150
ns
0
ns
1. These parameters are characterized and not 100% tested.
2. See AC Read Characteristics.
13
4259A–AERO–06/03
Toggle Bit Waveforms(1)(2)(3)
Notes:
14
1. Toggling either OE or CE or both OE and CE will operate toggle bit.
2. Beginning and ending state of I/O6 will vary.
3. Any addres location may be used but the address should not vary.
AT28C010-12DK
4259A–AERO–06/03
AT28C010-12DK
Ordering Information
tACC (ns)
ICC (mA)
Active
Ordering Code
Package
Standby
AT28C010-12DK-E
Engineering Samples
AT28C010-12DK-M
120
80
Packing
0.3
Standard Military Temperature
FP32.4
AT28C010-12DK-MQ
QML Q
AT28C010-12DK-SV
QML V
15
4259A–AERO–06/03
Packaging Information
FP32.435
16
32F, 32-Lead, Non-Windowed, Ceramic Bottom
Brazed Flat Package (Flatpack)
Dimensions in Inches and Millimeters
MIL-STD-1835 F-18 CONFIG B
JEDEC OUTLINE MO-115
AT28C010-12DK
4259A–AERO–06/03
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4259A–AERO–06/03
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