24AA65 DATA SHEET (07/15/2008) DOWNLOAD

24AA65/24LC65/24C65
64K I2C™ Smart Serial™ EEPROM
Device Selection Table
Part Number
VCC Range
Page Size
Temp. Ranges
Packages
24AA65
1.8-6.0V
64 Bytes
C
P, SM
24LC65
2.5-6.0V
64 Bytes
C, I
P, SM
24C65
4.5-6.0V
64 Bytes
C, I, E
P, SM
Features:
Description:
• Voltage Operating Range: 1.8V to 6.0V
- Peak write current 3 mA at 6.0V
- Maximum read current 150 μA at 6.0V
- Standby current 1 μA, typical
• Industry Standard Two-Wire Bus Protocol I2C™
Compatible
• 8-Byte Page, or Byte modes Available
• 2 ms Typical Write Cycle Time, Byte or Page
• 64-Byte Input Cache for Fast Write Loads
• Up to 8 devices may be connected to the same
bus for up to 512K bits total memory
• Including 100 kHz (1.8V ≤ Vcc < 4.5V) and 400
kHz (4.5V ≤ VCC ≤ 6.0V) Compatibility
• Programmable Block Security Options
• Programmable Endurance Options
• Schmitt Trigger, Filtered Inputs for Noise
Suppression
• Output Slope Control to Eliminate Ground Bounce
• Self-Timed Erase and Write Cycles
• Power-on/off Data Protection Circuitry
• Endurance:
- 10,000,000 E/W cycles for a High Endurance
Block
- 1,000,000 E/W cycles for a Standard
Endurance Block
• Electrostatic Discharge Protection > 4000V
• Data Retention > 200 years
• 8-pin PDIP/SOIJ Packages
• Temperature Ranges
- Industrial (I)
-40°C to +85°C
- Automotive (E)
-40°C to +125°C
• Pb-Free and RoHS Compliant
The Microchip Technology Inc. 24AA65/24LC65/
24C65 (24XX65)* is a “smart” 8K x 8 Serial Electrically
Erasable PROM. This device has been developed for
advanced, low-power applications such as personal
communications, and provides the systems designer
with flexibility through the use of many new user-programmable features. The 24XX65 offers a relocatable
4K bit block of ultra-high-endurance memory for data
that changes frequently. The remainder of the array, or
60K bits, is rated at 1,000,000 erase/write (E/W) cycles
ensured. The 24XX65 features an input cache for fast
write loads with a capacity of eight pages, or 64 bytes.
This device also features programmable security
options for E/W protection of critical data and/or code
of up to fifteen 4K blocks. Functional address lines
allow the connection of up to eight 24XX65’s on the
same bus for up to 512K bits contiguous EEPROM
memory. Advanced CMOS technology makes this
device ideal for low-power nonvolatile code and data
applications. The 24XX65 is available in the standard
8-pin plastic DIP and 8-pin surface mount SOIJ
package.
*24XX65 is used in this document as a generic part
number for the 24AA65/24LC65/24C65 devices.
© 2008 Microchip Technology Inc.
Package Types
A0
1
8
VCC
A1
2
7
NC
A2
3
6
SCL
VSS
4
5
SDA
A0
1
8
VCC
A1
2
7
NC
A2
3
6
SCL
VSS
4
5
SDA
24XX65
PDIP
24XX65
SOIJ
DS21073K-page 1
24AA65/24LC65/24C65
Block Diagram
Pin Function Table
A0 A1 A2
I/O
Control
Logic
Memory
Control
Logic
HV Generator
XDEC
EEPROM
Array
Page Latches
I/O
SCL
SDA
Name
A0, A1, A2
VSS
SDA
SCL
VCC
NC
Function
User Configurable Chip Selects
Ground
Serial Address/Data/I/O
Serial Clock
+1.8V to 6.0V Power Supply
No Internal Connection
Cache
YDEC
VCC
VSS
DS21073K-page 2
Sense Amp.
R/W Control
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings(†)
VCC.............................................................................................................................................................................7.0V
All inputs and outputs w.r.t. VSS ..........................................................................................................-0.6V to VCC +1.0V
Storage temperature ...............................................................................................................................-65°C to +150°C
Ambient temperature with power applied................................................................................................-40°C to +125°C
ESD protection on all pins ......................................................................................................................................................≥ 4 kV
† NOTICE: Stresses above 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 those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an
extended period of time may affect device reliability.
TABLE 1-1:
DC CHARACTERISTICS
VCC = +1.8V to +6.0V
Commercial
(C): TA =
Industrial
(I): TA =
Automotive
(E): TA =
DC CHARACTERISTICS
Parameter
A0, A1, A2, SCL and SDA pins:
High-level input voltage
Low-level input voltage
Hysteresis of Schmitt Trigger inputs
Low-level output voltage
Input leakage current
Output leakage current
Pin capacitance
(all inputs/outputs)
Operating current
Standby current
Note 1:
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
Sym
Min
Max
Units
VIH
VIL
VHYS
VOL
ILI
ILO
CIN, COUT
.7 VCC
—
.05 VCC
—
—
—
—
—
.3 VCC
—
.40
±1
±1
10
V
V
V
V
μA
μA
pF
ICC Write
ICC Read
ICCS
—
—
—
3
150
5
mA
μA
μA
Conditions
(Note 1)
IOL = 3.0 mA
VIN = .1V to VCC
VOUT = .1V to VCC
VCC = 5.0V (Note 1)
TA = 25°C, FCLK = 1 MHz
VCC = 6.0V, SCL = 400 kHz
VCC = 6.0V, SCL = 400 kHz
VCC = 5.0V, SCL = SDA = VCC
A0, A1, A2 = VSS
This parameter is periodically sampled and not 100% tested.
FIGURE 1-1:
BUS TIMING START/STOP
VHYS
SCL
THD:STA
TSU:STA
TSU:STO
SDA
Start
© 2008 Microchip Technology Inc.
Stop
DS21073K-page 3
24AA65/24LC65/24C65
TABLE 1-2:
AC CHARACTERISTICS
VCC = 1.8V-6.0V
STD. Mode
Symbol
Parameter
VCC = 4.5-6.0V
FAST Mode
Min
Max
Min
Max
Units
Clock frequency
Clock high time
Clock low time
SDA and SCL rise time
SDA and SCL fall time
Start condition setup time
FCLK
THIGH
TLOW
TR
TF
THD:STA
—
4000
4700
—
—
4000
100
—
—
1000
300
—
—
600
1300
—
—
600
400
—
—
300
300
—
kHz
ns
ns
ns
ns
ns
Start condition setup time
TSU:STA
4700
—
600
—
ns
Data input hold time
Data input setup time
Stop condition setup time
Output valid from clock
Bus free time
THD:DAT
TSU:DAT
TSU:STO
TAA
TBUF
0
250
4000
—
4700
—
—
—
3500
—
0
100
600
—
1300
—
—
—
900
—
ns
ns
ns
ns
ns
Remarks
(Note 1)
(Note 1)
After this period the first
clock pulse is generated
Only relevant for
repeated Start condition
(Note 2)
Time the bus must be
free before a new
transmission can start
(Note 1), CB ≤ 100 pF
Output fall time from VIH min to TOF
—
250
20 + 0.1
250
ns
VIL max
CB
50
—
50
—
ns
(Note 3)
Input filter spike suppression
TSP
(SDA and SCL pins)
—
5
—
5
ms/page (Note 4)
Write cycle time
TWR
Endurance
High Endurance Block
10M
—
10M
—
cycles 25°C, (Note 5)
Rest of Array
1M
—
1M
—
Note 1: Not 100 percent tested. CB = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region
(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.
3: The combined TSP and VHYS specifications are due to new Schmitt Trigger inputs which provide improved
noise and spike suppression. This eliminates the need for a Ti specification for standard operation.
4: The times shown are for a single page of 8 bytes. Multiply by the number of pages loaded into the write
cache for total time.
5: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be downloaded at www.microchip.com.
FIGURE 1-2:
BUS TIMING DATA
TF
TR
THIGH
TLOW
SCL
TSU:STA
THD:DAT
TSU:DAT
THD:STA
SDA
IN
TSP
TSU:STO
TBUF
TAA
TAA
SDA
OUT
DS21073K-page 4
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
2.0
FUNCTIONAL DESCRIPTION
The 24XX65 supports a bidirectional two-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as transmitter, and a device
receiving data as receiver. The bus must be controlled
by a master device which generates the serial clock
(SCL), controls the bus access and generates the Start
and Stop conditions, while the 24XX65 works as slave.
Both master and slave can operate as transmitter or
receiver, but the master device determines which mode
is activated.
3.0
BUS CHARACTERISTICS
The following bus protocol has been defined:
• Data transfer may be initiated only when the bus
is not busy.
• During data transfer, the data line must remain
stable whenever the clock line is high. Changes in
the data line while the clock line is high will be
interpreted as a Start or Stop condition.
Accordingly, the following bus conditions have been
defined (Figure 3-1).
3.1
3.3
A low-to-high transition of the SDA line while the clock
(SCL) is high determines a Stop condition. All
operations must be ended with a Stop condition.
3.4
The data on the line must be changed during the low
period of the clock signal. There is one clock pulse per
bit of data.
Each data transfer is initiated with a Start condition and
terminated with a Stop condition. The number of the
data bytes transferred between the Start and Stop
conditions is determined by the master device.
3.5
Start Data Transfer (B)
A high-to-low transition of the SDA line while the clock
(SCL) is high determines a Start condition. All
commands must be preceded by a Start condition.
FIGURE 3-1:
SCL
(A)
Acknowledge
Each receiving device, when addressed, is obliged to
generate an acknowledge after the reception of each
byte. The master device must generate an extra clock
pulse which is associated with this Acknowledge bit.
Both data and clock lines remain high.
3.2
Data Valid (D)
The state of the data line represents valid data when,
after a Start condition, the data line is stable for the
duration of the high period of the clock signal.
Note:
Bus not Busy (A)
Stop Data Transfer (C)
The 24XX65 does not generate any
Acknowledge bits if an internal programming cycle is in progress.
A device that acknowledges must pull down the SDA
line during the Acknowledge clock pulse in such a way
that the SDA line is stable low during the high period of
the acknowledge related clock pulse. Of course, setup
and hold times must be taken into account. During
reads, a master must signal an end of data to the slave
by NOT generating an Acknowledge bit on the last byte
that has been clocked out of the slave. In this case, the
slave (24XX65) must leave the data line high to enable
the master to generate the Stop condition.
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
(B)
(D)
Start
Condition
Address or
Acknowledge
Valid
(D)
(C)
(A)
SDA
© 2008 Microchip Technology Inc.
Data
Allowed
To Change
Stop
Condition
DS21073K-page 5
24AA65/24LC65/24C65
3.6
Device Addressing
A control byte is the first byte received following the
Start condition from the master device. The control byte
consists of a four-bit control code, for the 24XX65 this
is set as ‘1010’ binary for read and write operations.
The next three bits of the control byte are the device
select bits (A2, A1, A0). They are used by the master
device to select which of the eight devices are to be
accessed. These bits are in effect the three Most
Significant bits of the word address. The last bit of the
control byte defines the operation to be performed.
When set to a one a read operation is selected, when
set to a zero a write operation is selected. The next two
bytes received define the address of the first data byte
(Figure 4-1). Because only A12..A0 are used, the
upper three address bits must be zeros. The Most
Significant bit of the Most Significant Byte is transferred
first. Following the Start condition, the 24XX65
monitors the SDA bus checking the device type
identifier being transmitted. Upon receiving a ‘1010’
code and appropriate device select bits, the slave
device (24XX65) outputs an Acknowledge signal on the
SDA line. Depending upon the state of the R/W bit, the
24XX65 will select a read or write operation.
Operation Control Code
Device Select
R/W
Read
1010
Device Address
1
Write
1010
Device Address
0
FIGURE 3-2:
CONTROL BYTE
ALLOCATION
START
READ/WRITE
SLAVE ADDRESS
1
0
DS21073K-page 6
1
0
A2
R/W
A1
A0
A
4.0
WRITE OPERATION
4.1
Byte Write
Following the Start condition from the master, the control code (four bits), the device select (three bits), and
the R/W bit which is a logic low, is placed onto the bus
by the master transmitter. This indicates to the
addressed slave receiver (24XX65) that a byte with a
word address will follow after it has generated an
Acknowledge bit during the ninth clock cycle. Therefore, the next byte transmitted by the master is the
high-order byte of the word address and will be written
into the Address Pointer of the 24XX65. The next byte
is the Least Significant Address Byte. After receiving
another Acknowledge signal from the 24XX65, the
master device will transmit the data word to be written
into the addressed memory location. The 24XX65
acknowledges again and the master generates a Stop
condition. This initiates the internal write cycle, and
during this time the 24XX65 will not generate
Acknowledge signals (Figure 4-1).
4.2
Page Write
The write control byte, word address and the first data
byte are transmitted to the 24XX65 in the same way as
in a byte write. But instead of generating a Stop
condition, the master transmits up to eight pages of
eight data bytes each (64 bytes total), which are
temporarily stored in the on-chip page cache of the
24XX65. They will be written from the cache into the
EEPROM array after the master has transmitted a Stop
condition. After the receipt of each word, the six lower
order Address Pointer bits are internally incremented by
one. The higher order seven bits of the word address
remain constant. If the master should transmit more
than eight bytes prior to generating the Stop condition
(writing across a page boundary), the address counter
(lower three bits) will roll over and the pointer will be
incremented to point to the next line in the cache. This
can continue to occur up to eight times or until the cache
is full, at which time a Stop condition should be
generated by the master. If a Stop condition is not
received, the cache pointer will roll over to the first line
(byte 0) of the cache, and any further data received will
overwrite previously captured data. The Stop condition
can be sent at any time during the transfer. As with the
byte write operation, once the Stop condition is received
an internal write cycle will begin. The 64-byte cache will
continue to capture data until a Stop condition occurs or
the operation is aborted (Figure 4-2).
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
FIGURE 4-1:
BYTE WRITE
Bus Activity
Master
S
T
A
R
T
SDA Line
S
Bus
Activity
Master
S
T
A
R
T
A
C
K
Data
P
A
C
K
A
C
K
A
C
K
PAGE WRITE (FOR CACHE WRITE, SEE FIGURE 8-2)
Word
Address (0)
Word
Address (1)
Control
Byte
SDA Line S
Data n
S
T
O
P
Data n + 7
P
0 0 0
A
C
K
Bus
Activity:
FIGURE 4-3:
S
T
O
P
0 0 0
Bus Activity
FIGURE 4-2:
Word
Address (0)
Word
Address (1)
Control
Byte
A
C
K
A
C
K
A
C
K
A
C
K
CURRENT ADDRESS READ
Bus Activity
Master
S
T
A
R
T
SDA Line
S
Bus Activity
© 2008 Microchip Technology Inc.
Control
Byte
S
T
O
P
Data n
P
A
C
K
N
O
A
C
K
DS21073K-page 7
24AA65/24LC65/24C65
FIGURE 4-4:
S
T
A
R
T
RANDOM READ
Word
Address (1)
Control
Byte
FIGURE 4-5:
Bus Activity
Master
Word
Address (0)
0 0 0
SDA Line S
Bus
Activity
S
T
A
R
T
Control
Byte
S
T
O
P
Data n
P
S
A
C
K
A
C
K
A
C
K
N
O
A
C
K
A
C
K
SEQUENTIAL READ
Control
Byte
Data n
Data n + 1
Data n + 2
S
T
O
P
Data n + X
P
SDA Line
Bus Activity
DS21073K-page 8
A
C
K
A
C
K
A
C
K
A
C
K
N
O
A
C
K
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
5.0
READ OPERATION
Read operations are initiated in the same way as write
operations with the exception that the R/W bit of the
slave address is set to one. There are three basic types
of read operations: current address read, random read
and sequential read.
5.1
Current Address Read
The 24XX65 contains an address counter that maintains the address of the last word accessed, internally
incremented by one. Therefore, if the previous access
(either a read or write operation) was to address n (n is
any legal address), the next current address read
operation would access data from address n + 1. Upon
receipt of the slave address with R/W bit set to one, the
24XX65 issues an acknowledge and transmits the
eight-bit data word. The master will not acknowledge
the transfer but does generate a Stop condition and the
24XX65 discontinues transmission (Figure 4-3).
5.2
Random Read
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, first the word address must
be set. This is done by sending the word address to the
24XX65 as part of a write operation (R/W bit set to ‘0’).
After the word address is sent, the master generates a
Start condition following the acknowledge. This
terminates the write operation, but not before the
internal Address Pointer is set. Then the master issues
the control byte again, but with the R/W bit set to a one.
The 24XX65 will then issue an acknowledge and
transmit the eight-bit data word. The master will not
acknowledge the transfer, but does generate a Stop
condition which causes the 24XX65 to discontinue
transmission (Figure 4-4).
5.3
5.4
Contiguous Addressing Across
Multiple Devices
The device select bits A2, A1, A0 can be used to
expand the contiguous address space for up to 512K
bits by adding up to eight 24XX65's on the same bus.
In this case, software can use A0 of the control byte as
address bit A13, A1 as address bit A14 and A2 as
address bit A15.
5.5
Noise Protection
The SCL and SDA inputs have filter circuits which
suppress noise spikes to assure proper device
operation even on a noisy bus. All I/O lines incorporate
Schmitt Triggers for 400 kHz (Fast mode) compatibility.
5.6
High Endurance Block
The location of the high endurance block within the
memory map is programmed by setting the leading bit
7 (S/HE) of the configuration byte to ‘0’. The upper bits
of the address loaded in this command will determine
which 4K block within the memory map will be set to
high endurance. This block will be capable of
10,000,000 erase/write cycles typical (Figure 8-1).
The high endurance block will retain its value as the
high endurance block even if it resides within the
security block range. The high endurance setting
always takes precedence to the security setting.
Note:
The high endurance block cannot be
changed after the security option has been
set with a length greater than zero. If the
H.E. block is not programmed by the user,
the default location is the highest block of
memory which starts at location 0x1E00
and ends at 0x1FFF.
Sequential Read
Sequential reads are initiated in the same way as a
random read except that after the 24XX65 transmits the
first data byte, the master issues an acknowledge as
opposed to the Stop condition used in a random read.
This acknowledge directs the 24XX65 to transmit the
next sequentially addressed 8-bit word (Figure 4-5).
Following the final byte transmitted to the master, the
master will NOT generate an acknowledge, but will
generate a Stop condition.
To provide sequential reads the 24XX65 contains an
internal Address Pointer which is incremented by one
at the completion of each operation. This Address
Pointer allows the entire memory contents to be serially
read during one operation.
© 2008 Microchip Technology Inc.
DS21073K-page 9
24AA65/24LC65/24C65
5.7
Security Options
The 24XX65 has a sophisticated mechanism for write
protecting portions of the array. This write-protect
function is programmable and allows the user to protect
0-15 contiguous 4K blocks. The user sets the security
option by sending to the device the starting block
number for the protected region and the number of
blocks to be protected. All parts will come from the
factory in the default configuration with the starting
block number set to 15 and the number of protected
blocks set to zero. THE SECURITY OPTION CAN BE
SET ONLY ONCE WITH A LENGTH GREATER THAN
ZERO.
To invoke the security option, a Write command is sent
to the device with the leading bit (bit 7) of the first
address byte set to a ‘1’ (Figure 8-1). Bits 1-4 of the first
address byte define the starting block number for the
protected region.
For example, if the starting block number is to be set to
5, the first address byte would be 1XX0101X. Bits 0, 5
and 6 of the first address byte are disregarded by the
device and can be either high or low. The device will
acknowledge after the first address byte. A byte of
“don’t care” bits is then sent by the master, with the
device acknowledging afterwards. The third byte sent
to the device has bit 7 (S/HE) set high and bit 6 (R) set
low. Bits 4 and 5 are “don’t cares” and bits 0-3 define
the number of blocks to be write-protected. For example, if three blocks are to be protected, the third byte
would be 10XX0011. After the third byte is sent to the
device, it will acknowledge and a Stop bit is then sent
by the master to complete the command.
If one of the security blocks coincides with the high
endurance block, the high endurance setting will take
precedence. Also, if the range of the security blocks
encompass the high endurance block when the security option is set, the security block range will be set
accordingly, but the high endurance block will continue
to retain the high endurance setting. As a result, the
memory blocks preceding the high endurance block will
be set as secure sections.
During a normal write sequence, if an attempt is made
to write to a protected address, no data will be written
and the device will not report an error or abort the
command. If a Write command is attempted across a
secure boundary, unprotected addresses will be written
and protected addresses will not.
5.8
Security Configuration Read
The status of the secure portion of memory can be read
by using the same technique as programming this
option except the read bit (bit 6) of the configuration
byte is set to a one. After the configuration byte is sent,
the device will acknowledge and then send two bytes of
data to the master just as in a normal read sequence.
The master must acknowledge the first byte and not
DS21073K-page 10
acknowledge the second, and then send a Stop bit to
end the sequence. The upper four bits of both of these
bytes will always be read as ‘1’s. The lower four bits of
the first byte contains the starting secure block. The
lower four bits of the second byte contains the number
of secure blocks. The default starting secure block is
fifteen and the default number of secure blocks is zero
(Figure 8-1).
6.0
ACKNOWLEDGE POLLING
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the Stop condition for a Write
command has been issued from the master, the device
initiates the internally timed write cycle. ACK polling
can be initiated immediately. This involves the master
sending a Start condition followed by the control byte
for a Write command (R/W = 0). If the device is still
busy with the write cycle, then no ACK will be returned.
If the cycle is complete, then the device will return the
ACK and the master can then proceed with the next
Read or Write command. See Figure 6-1 for flow
diagram.
FIGURE 6-1:
ACKNOWLEDGE
POLLING FLOW
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
Did Device
Acknowledge
(ACK = 0)?
NO
YES
Next
Operation
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
7.0
PAGE CACHE AND ARRAY
MAPPING
The cache is a 64-byte (8 pages x 8 bytes) FIFO buffer.
The cache allows the loading of up to 64 bytes of data
before the write cycle is actually begun, effectively
providing a 64-byte burst write at the maximum bus
rate. Whenever a Write command is initiated, the cache
starts loading and will continue to load until a Stop bit is
received to start the internal write cycle. The total
length of the write cycle will depend on how many
pages are loaded into the cache before the Stop bit is
given. Maximum cycle time for each page is 5 ms. Even
if a page is only partially loaded, it will still require the
same cycle time as a full page. If more than 64 bytes of
data are loaded before the Stop bit is given, the
Address Pointer will ‘wrap around’ to the beginning of
cache page 0 and existing bytes in the cache will be
overwritten. The device will not respond to any
commands while the write cycle is in progress.
7.1
Cache Write Starting at a Page
Boundary
If a Write command begins at a page boundary
(address bits A2, A1 and A0 are zero), then all data
loaded into the cache will be written to the array in
sequential addresses. This includes writing across a
4K block boundary. In the example shown below,
(Figure 8-2) a Write command is initiated starting at
byte 0 of page 3 with a fully loaded cache (64 bytes).
The first byte in the cache is written to byte 0 of page 3
(of the array), with the remaining pages in the cache
written to sequential pages in the array. A write cycle is
executed after each page is written. Since the write
begins at page 3 and 8 pages are loaded into the
cache, the last 3 pages of the cache are written to the
next row in the array.
7.2
Cache Write Starting at a
Non-Page Boundary
When a Write command is initiated that does not begin
at a page boundary (i.e., address bits A2, A1 and A0
are not all zero), it is important to note how the data is
loaded into the cache, and how the data in the cache is
written to the array. When a Write command begins, the
first byte loaded into the cache is always loaded into
page 0. The byte within page 0 of the cache where the
load begins is determined by the three Least Significant
Address bits (A2, A1, A0) that were sent as part of the
Write command. If the Write command does not start at
byte 0 of a page and the cache is fully loaded, then the
last byte(s) loaded into the cache will roll around to
page 0 of the cache and fill the remaining empty bytes.
If more than 64 bytes of data are loaded into the cache,
data already loaded will be overwritten. In the example
shown in Figure 8-3, a Write command has been
initiated starting at byte 2 of page 3 in the array with a
© 2008 Microchip Technology Inc.
fully loaded cache of 64 bytes. Since the cache started
loading at byte 2, the last two bytes loaded into the
cache will ‘roll over' and be loaded into the first two
bytes of page 0 (of the cache). When the Stop bit is
sent, page 0 of the cache is written to page 3 of the
array. The remaining pages in the cache are then
loaded sequentially to the array. A write cycle is
executed after each page is written. If a partially loaded
page in the cache remains when the Stop bit is sent,
only the bytes that have been loaded will be written to
the array.
7.3
Power Management
The design incorporates a power Standby mode when
not in use and automatically powers off after the normal
termination of any operation when a Stop bit is received
and all internal functions are complete. This includes
any error conditions (i.e., not receiving an Acknowledge or Stop condition per the two-wire bus specification). The device also incorporates VDD monitor
circuitry to prevent inadvertent writes (data corruption)
during low voltage conditions. The VDD monitor circuitry
is powered off when the device is in Standby mode in
order to further reduce power consumption.
8.0
PIN DESCRIPTIONS
8.1
A0, A1, A2 Chip Address Inputs
The A0..A2 inputs are used by the 24XX65 for multiple
device operation and conform to the two-wire bus
standard. The levels applied to these pins define the
address block occupied by the device in the address
map. A particular device is selected by transmitting the
corresponding bits (A2, A1, A0) in the control byte
(Figure 3-2 and Figure 8-1).
8.2
SDA Serial Address/Data Input/
Output
This is a bidirectional pin used to transfer addresses
and data into and data out of the device. It is an open
drain terminal, therefore the SDA bus requires a pull-up
resistor to VCC (typical 10 KΩ for 100 kHz, 2 KΩ for 400
kHz).
For normal data transfer SDA is allowed to change only
during SCL low. Changes during SCL high are
reserved for indicating the Start and Stop conditions.
8.3
SCL Serial Clock
This input is used to synchronize the data transfer from
and to the device.
DS21073K-page 11
24AA65/24LC65/24C65
FIGURE 8-1:
Control Byte
1 0 1 0 A A A R/W
2 1 0
CONTROL SEQUENCE BIT ASSIGNMENTS
Address Byte 1
Address Byte 0
S 0 0 A A A A A
12 11 10 9 8
A
A
7 • • • • • • 0
Configuration Byte
R X X B B B B
3 2 1 0
S/HE
Slave Device
Address Select
Bits
Block
Count
Security Read
S
t
a
r
t
Acknowledge
from
Master
Acknowledges from Device
Data from Device
R
No
ACK
S
t
Data from Device
o
p
A
A
A
A
A
1 0 1 0 A A A 0 C 1 X X X X X X X C X X X X X X X X C 1 1 X X X X X X C 1 1 1 1 B B B B C 1 1 1 1 N N N N
2 1 0
3 2 1 0
3 2 1 0 K
K
K
K
K
S/HE
Starting Block
Number
Number of
Blocks to
Protect
Security Write
S
t
a
r
t
S
t
o
p
Acknowledges from Device
R
A
A
A
A
1 0 1 0 A A A 0 C 1 X X B B B B X C X X X X X X X X C 1 0 X X N N N N C
3 2 1 0 K
2 1 0
3 2 1 0
K
K
K
S/HE
Starting Block
Number
Number of
Blocks to
Protect
High Endurance Block Read
S
t
a
r
t
No
ACK
Acknowledges from Device
Data from Device
R
S
t
o
p
A
A
A
A
1 0 1 0 A A A 0 C 1 X X X X X X X C X X X X X X X X C 0 1 X X X X X X C 1 1 1 1 B B B B
2 1 0
3 2 1 0
K
K
K
K
S/HE
High Endurance
Block Number
High Endurance Block Write
S
t
a
r
t
Acknowledges from Device
R
S
t
o
p
A
A
A
A
1 0 1 0 A A A 0 C 1 X X B B B B X C X X X X X X X X C 0 0 X X 0 0 0 0 C
2 1 0
3 2 1 0
K
K
K
K
High Endurance
Block Number
DS21073K-page 12
S/HE
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
FIGURE 8-2:
CACHE WRITE TO THE ARRAY STARTING AT A PAGE BOUNDARY
1 Write command initiated at byte 0 of page 3 in the array;
First data byte is loaded into the cache byte 0.
2 64 bytes of data are loaded into cache.
cache page 0
cache
byte 0
cache
byte 1
cache
byte 7
• • •
cache page 1 cache page 2
bytes 8-15
bytes 16-23
3 Write from cache into array initiated by STOP bit.
Page 0 of cache written to page 3 of array.
Write cycle is executed after every page is written.
page 0 page 1 page 2
byte 0
byte 1
page 0 page 1 page 2
• • •
cache page 7
bytes 56-63
4 Remaining pages in cache are written
to sequential pages in array.
• • •
byte 7
page 3
page 4
• • •
page 7 array row n
page 4
• • •
page 7 array row n + 1
5 Last page in cache written to page 2 in next row.
FIGURE 8-3:
Last 2 bytes
loaded into
page 0 of cache.
CACHE WRITE TO THE ARRAY STARTING AT A NON-PAGE BOUNDARY
1 Write command initiated; 64 bytes of data
loaded into cache starting at byte 2 of page 0.
3
cache
byte 0
cache
byte 1
cache
byte 2
• • •
cache
byte 7
2 Last 2 bytes loaded 'roll over'
to beginning.
cache page 1 cache page 2
bytes 8-15
bytes 16-23
• • •
cache page 7
bytes 56-63
4 Write from cache into array initiated by STOP bit.
5 Remaining bytes in cache are
Page 0 of cache written to page 3 of array.
Write cycle is executed after every page is written.
written sequentially to array.
page 0 page 1 page 2
byte 0
byte 1
byte 2
page 0 page 1 page 2
byte 3
page 3
byte 4
• • •
byte 7
page 4
• • •
page 4
• • •
page 7 array
row n
page 7 array
row
n+1
6 Last 3 pages in cache written to next row in array.
© 2008 Microchip Technology Inc.
DS21073K-page 13
24AA65/24LC65/24C65
9.0
PACKAGING INFORMATION
9.1
Package Marking Information
8-Lead PDIP (300 mil)
24LC65
I/P017
0310
XXXXXXXX
T/XXXNNN
YYWW
8-Lead SOIJ (5.28 mm)
XXXXXXXX
T/XXXXXX
YYWWNNN
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
*
Example:
Example:
24LC65
I/SM
0110017
Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
Standard PICmicro device marking consists of Microchip part number, year code, week code, and
traceability code. For PICmicro device marking beyond this, certain price adders apply. Please check
with your Microchip Sales Office. For QTP devices, any special marking adders are included in QTP
price.
DS21073K-page 14
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
3
&'
!&"&4#*!(!!&
4%&
&#&
&&255***'
'54
N
NOTE 1
E1
1
3
2
D
E
A2
A
L
A1
c
e
eB
b1
b
6&!
'!
9'&!
7"')
%!
7,8.
7
7
7:
;
<
&
&
&
=
=
##44!!
-
1!&
&
=
=
"#&
"#>#&
.
-
-
##4>#&
.
<
: 9&
-<
-?
&
&
9
-
9#4!!
<
)
?
)
<
1
=
=
69#>#&
9
*9#>#&
: *+
1,
-
!"#$%&"' ()"&'"!&)
&#*&&&#
+%&,&!&
- '!
!#.#
&"#'
#%!
&"!
!
#%!
&"!
!!
&$#/!#
'!
#&
.0
1,21!'!
&$& "!
**&
"&&
!
* ,<1
© 2008 Microchip Technology Inc.
DS21073K-page 15
24AA65/24LC65/24C65
!
""#$%& !'
3
&'
!&"&4#*!(!!&
4%&
&#&
&&255***'
'54
D
N
E
E1
1
2
e
b
α
c
φ
A2
A
β
A1
6&!
'!
9'&!
7"')
%!
L
99..
7
7
7:
;
<
&
: 8&
1,
=
##44!!
=
<
&#
%%+
=
: >#&
.
?
=
<?
##4>#&
.
=
-<
: 9&
-
=
--
3
&9&
9
=
?
3
&
I
A
=
<A
9#4!!
=
9#>#&
)
-?
=
#%&
D
=
=
A
#%&1
&&
'
E
=
=
A
-
:@(@.5.@&##(%
'#:,
+%&,&!&
- '!
!#.#
&"#'
#%!
&"!
!
#%!
&"!
!!
&$#''!#
* ,?1
DS21073K-page 16
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
© 2008 Microchip Technology Inc.
DS21073K-page 17
24AA65/24LC65/24C65
APPENDIX A:
REVISION HISTORY
Revision J
Corrections to Section 1.0, Electrical Characteristics.
Revision K (07/2008)
Revised Temperature ranges; Ambient temperature;
Revised Package Drawings; Replaced On-line
Support; Revised Product ID System.
DS21073K-page 18
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
Users of Microchip products can receive assistance
through several channels:
• Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
• General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
• Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
•
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Development Systems Information Line
Customers
should
contact
their
distributor,
representative or field application engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical support is available through the web site
at: http://support.microchip.com
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com, click on Customer Change
Notification and follow the registration instructions.
© 2008 Microchip Technology Inc.
DS21073K-page 19
24AA65/24LC65/24C65
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
To:
Technical Publications Manager
RE:
Reader Response
Total Pages Sent ________
From: Name
Company
Address
City / State / ZIP / Country
Telephone: (_______) _________ - _________
FAX: (______) _________ - _________
Application (optional):
Would you like a reply?
Y
Device: 24AA65/24LC65/24C65
N
Literature Number: DS21073K
Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
DS21073K-page 20
© 2008 Microchip Technology Inc.
24AA65/24LC65/24C65
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
X
/XX
XXX
Device
Temperature
Range
Package
Pattern
Device:
24AA65 - 64K I2C 1.8V Serial EEPROM (100 kHz)
24AA65T - 64K I2C 1.8V Serial EEPROM (100 kHz)
24LC65 - 64K I2C Serial EEPROM (100 kHz/400 kHz)
24LC65T - 64K I2C Serial EEPROM (Tape and Reel)
24C65 - 64K I2C 4.5V Serial EEPROM (400 kHz)
24C65T - 64K I2C 4.5V Serial EEPROM (Tape and Reel)
Examples:
a)
b)
c)
d)
Temperature
Range:
I
E
= -40°C to +85°C
= -40°C to +125°C
Package:
P
SM
=
=
24LC65T-I/SM: 64 Kbit Smart Serial,
Tape and Reel, 5.28 mm SOIJ package,
Industrial temperature, 2.5V
24LC65-I/P: 64 Kbit Smart Serial,
Industrial temperature, PDIP package,
2.5V
24AA65T-/SM: 64 Kbit Smart Serial,
Tape and Reel, 5.28 mm SOIJ package,
Commercial temperature, 1.8V
24C65-E/P: 64 Kbit Smart Serial,
Automotive temperature, PDIP, 5V
Plastic DIP (300 mil Body)
Plastic SOIJ (5.28 mm Body, EIAJ standard)
© 2008 Microchip Technology Inc.
DS21073K-page 21
24AA65/24LC65/24C65
NOTES:
DS21073K-page 22
© 2008 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, rfPIC and SmartShunt are registered trademarks
of Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Linear Active Thermistor, MXDEV, MXLAB,
SEEVAL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, In-Circuit Serial
Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM,
PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo,
PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total
Endurance, UNI/O, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2008, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
© 2008 Microchip Technology Inc.
DS21073K-page 23
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-4182-8400
Fax: 91-80-4182-8422
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Hsin Chu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
01/02/08
DS21073K-page 24
© 2008 Microchip Technology Inc.
Similar pages