AT34C02C-TH-B [ATMEL]

Two-wire Serial EEPROM with Permanent and Reversible Software Write Protect 2K (256 x 8); 两线串行EEPROM与永久及可逆软件写保护2K ( 256 ×8 )
AT34C02C-TH-B
型号: AT34C02C-TH-B
厂家: ATMEL    ATMEL
描述:

Two-wire Serial EEPROM with Permanent and Reversible Software Write Protect 2K (256 x 8)
两线串行EEPROM与永久及可逆软件写保护2K ( 256 ×8 )

可编程只读存储器 电动程控只读存储器 电可擦编程只读存储器
文件: 总25页 (文件大小:660K)
中文:  中文翻译
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Features  
Permanent and Reversible Software Write Protection for the First-half of the Array  
– Software Procedure to Verify Write Protect Status  
Hardware Write Protection for the Entire Array  
Low-voltage and Standard-voltage Operation  
– 1.7 (VCC = 1.7V to 5.5V)  
Internally Organized 256 x 8  
Two-wire Serial Interface  
Schmitt Trigger, Filtered Inputs for Noise Suppression  
Bidirectional Data Transfer Protocol  
100 kHz (1.7V) and 400 kHz (2.7V and 5.0V) Compatibility  
16-byte Page Write Modes  
Two-wire Serial  
EEPROM  
Partial Page Writes Are Allowed  
with Permanent  
and Reversible  
Software Write  
Protect  
Self-timed Write Cycle (5 ms max)  
High-reliability  
– Endurance: 1 Million Write Cycles  
– Data Retention: 100 Years  
8-lead JEDEC SOIC, 8-lead Ultra Thin Mini-MAP (MLP 2x3), 8-lead TSSOP, and 8-ball  
dBGA2 Packages  
Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers  
2K (256 x 8)  
Description  
The AT34C02C provides 2048 bits of serial electrically-erasable and programmable  
read only memory (EEPROM) organized as 256 words of 8 bits each. The first-half of  
the device incorporates a permanent and a reversible software write protection fea-  
ture while hardware write protection for the entire array is available via an external pin.  
Once the permanent software write protection is enabled, by sending a special com-  
mand to the device, it cannot be reversed. However, the reversible software write  
protection is enabled and can be reversed by sending a special command. The hard-  
ware write protection is controlled with the WP pin and can be used to protect the  
entire array, whether or not the software write protection has been enabled. This  
allows the user to protect none, first-half, or all of the array depending on the applica-  
tion. The device is optimized for use in many industrial and commercial applications  
where low-power and low-voltage operations are essential. The AT34C02C is avail-  
able in space saving 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini-MAP (MLP 2x3), 8-lead  
TSSOP, and 8-ball dBGA2 packages and is accessed via a Two-wire serial interface.  
AT34C02C  
It is available in 1.7V (1.7V to 5.5V).  
8-lead Ultra Thin Mini-MAP  
8
7
6
5
1
2
3
4
A0  
A1  
VCC  
WP  
8-ball dBGA2  
SCL  
SDA  
A2  
GND  
8-lead TSSOP  
8
7
6
5
1
2
3
4
A0  
VCC  
WP  
A0  
A1  
1
2
3
4
8
7
6
5
VCC  
WP  
A1  
(MLP 2x3) Bottom View  
8-lead SOIC  
A2  
SCL  
SDA  
A2  
SCL  
SDA  
GND  
GND  
A0  
A1  
1
2
3
4
8
7
6
5
VCC  
WP  
Bottom View  
A2  
SCL  
SDA  
GND  
Rev. 5185D–SEEPR–1/08  
Table 0-1.  
Pin Name  
A0 - A2  
SDA  
Pin Configurations  
Function  
Address Inputs  
Serial Data  
SCL  
Serial Clock Input  
Write Protect  
WP  
1. Absolute Maximum Ratings*  
*NOTICE:  
Stresses beyond those listed under “Absolute  
Maximum Ratings” may cause permanent dam-  
age 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.  
Operating Temperature..................................–55°C to +125°C  
Storage Temperature.....................................–65°C to +150°C  
Voltage on Any Pin  
with Respect to Ground....................................1.0V to +7.0V  
Maximum Operating Voltage .......................................... 6.25V  
DC Output Current........................................................ 5.0 mA  
Figure 1-1. Block Diagram  
VCC  
GND  
WP  
START  
STOP  
LOGIC  
SCL  
SDA  
SERIAL  
CONTROL  
LOGIC  
EN  
H.V. PUMP/TIMING  
DATA RECOVERY  
WRITE PROTECT  
CIRCUITRY  
LOAD  
COMP  
DEVICE  
ADDRESS  
COMPARATOR  
SOFTWARE WRITE  
PROTECTED AREA  
(00H - 7FH)  
LOAD  
INC  
A2  
A1  
A0  
R/W  
DATA WORD  
ADDR/COUNTER  
EEPROM  
Y DEC  
SERIAL MUX  
DIN  
DOUT/ACK  
LOGIC  
DOUT  
2
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
2. Pin Description  
SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM  
device and negative edge clock data out of each device.  
SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-  
drain driven and may be wire-ORed with any number of other open-drain or open collector  
devices.  
DEVICE/PAGE ADDRESSES (A2, A1, A0): The A2, A1, and A0 pins are device address inputs  
that are hardwired (directly to GND or to Vcc) for compatibility with other AT24Cxx devices.  
When the pins are hardwired, as many as eight 2K devices may be addressed on a single bus  
system. (Device addressing is discussed in detail under “Device Addressing,” page 9.) A device  
is selected when a corresponding hardware and software match is true. If these pins are left  
floating, the A2, A1, and A0 pins will be internally pulled down to GND. However, due to capaci-  
tive coupling that may appear during customer applications, Atmel recommends always  
connecting the address pins to a known state. When using a pull-up resistor, Atmel recommends  
using 10kor less.  
WRITE PROTECT (WP): The write protect input, when connected to GND, allows normal write  
operations. When WP is connected directly to Vcc, all write operations to the memory are inhib-  
ited. If the pin is left floating, the WP pin will be internally pulled down to GND. However, due to  
capacitive coupling that may appear during customer applications, Atmel recommends always  
connecting the WP pins to a known state. When using a pull-up resistor, Atmel recommends  
using 10kor less.  
Table 2-1.  
AT34C02C Write Protection Modes  
Permanent Write Protect  
Reversible Write Protect  
Register  
Part of the Array Write  
Protected  
WP Pin Status  
Register  
VCC  
Full Array (2K)  
GND or Floating  
Not Programmed  
Not Programmed  
Normal Read/Write  
First-Half of Array  
(1K: 00H - 7FH)  
GND or Floating  
GND or Floating  
Programmed  
First-Half of Array  
(1K: 00H - 7FH)  
Programmed  
Table 2-2.  
Applicable over recommended operating range from TA = 25°C, f = 100 kHz, VCC = +1.7V  
Pin Capacitance(1)  
Symbol  
CI/O  
Test Condition  
Max  
8
Units  
pF  
Conditions  
Input/Output Capacitance (SDA)  
Input Capacitance (A0, A1, A2, SCL)  
VI/O = 0V  
VIN = 0V  
CIN  
6
pF  
Note:  
1. This parameter is characterized and is not 100% tested.  
3
5185D–SEEPR–1/08  
Table 2-3.  
DC Characteristics  
Applicable over recommended operating range from: TAI = –40°C to +85°C, VCC = +1.7V to +5.5V, (unless otherwise noted)  
Symbol  
VCC  
ICC  
Parameter  
Test Condition  
Min  
Typ  
Max  
5.5  
Units  
V
Supply Voltage  
1.7  
Supply Current VCC = 5.0V  
Supply Current VCC = 5.0V  
Standby Current VCC = 1.7V  
Standby Current VCC = 3.6V  
Standby Current VCC = 5.5V  
Input Leakage Current  
Output Leakage Current  
Input Low Level(1)  
READ at 100 kHz  
WRITE at 100 kHz  
VIN = VCC or VSS  
VIN = VCC or VSS  
VIN = VCC or VSS  
VIN = VCC or VSS  
VOUT = VCC or VSS  
0.4  
2.0  
1.0  
mA  
mA  
µA  
µA  
µA  
µA  
µA  
V
ICC  
3.0  
ISB1  
ISB2  
ISB3  
ILI  
0.6  
3.0  
1.6  
4.0  
8.0  
18.0  
3.0  
0.10  
0.05  
ILO  
3.0  
VIL  
0.6  
VCC x 0.3  
VCC + 0.5  
0.4  
VIH  
Input High Level(1)  
VCC x 0.7  
V
VOL2  
VOL1  
Output Low Level VCC = 3.0V  
Output Low Level VCC = 1.7V  
IOL = 2.1 mA  
V
IOL = 0.15 mA  
0.2  
V
Note:  
1. VIL min and VIH max are reference only and are not tested.  
Table 2-4.  
AC Characteristics  
Applicable over recommended operating range from TAI = –40°C to +85°C, VCC = +1.7V to +5.5V, CL = 1 TTL Gate and  
100 pF (unless otherwise noted)  
1.7V  
2.7V, 5.0V  
Symbol  
fSCL  
Parameter  
Min  
Max  
Min  
Max  
Units  
kHz  
µs  
Clock Frequency, SCL  
Clock Pulse Width Low  
Clock Pulse Width High  
Noise Suppression Time(1)  
Clock Low to Data Out Valid  
100  
400  
tLOW  
tHIGH  
tI  
4.7  
4.0  
1.2  
0.6  
µs  
100  
4.5  
50  
ns  
tAA  
0.1  
4.7  
0.1  
1.2  
0.9  
µs  
Time the bus must be free before a new  
transmission can start(1)  
tBUF  
µs  
tHD.STA  
tSU.STA  
tHD.DAT  
tSU.DAT  
tR  
Start Hold Time  
4.0  
4.7  
0
0.6  
0.6  
0
µs  
µs  
µs  
ns  
µs  
ns  
µs  
Start Set-up Time  
Data In Hold Time  
Data In Set-up Time  
Inputs Rise Time(1)  
Inputs Fall Time(1)  
Stop Set-up Time  
200  
100  
1.0  
0.3  
tF  
300  
300  
tSU.STO  
4.7  
0.6  
4
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
Table 2-4.  
AC Characteristics  
Applicable over recommended operating range from TAI = –40°C to +85°C, VCC = +1.7V to +5.5V, CL = 1 TTL Gate and  
100 pF (unless otherwise noted)  
1.7V  
2.7V, 5.0V  
Symbol  
tDH  
Parameter  
Min  
Max  
Min  
Max  
Units  
ns  
Data Out Hold Time  
Write Cycle Time  
100  
50  
tWR  
5
5
ms  
Write  
Cycles  
Endurance(1)  
25°C, Page Mode  
1M  
1M  
Note:  
1. This parameter is characterized and is not 100% tested.  
3. Memory Organization  
AT34C02C, 2K Serial EEPROM: The 2K is internally organized with 16 pages of 16 bytes each.  
Random word addressing requires a 8-bit data word address.  
5
5185D–SEEPR–1/08  
4. Device Operation  
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external  
device. Data on the SDA pin may change only during SCL low time periods (see Figure 4-3 on  
page 7). Data changes during SCL high periods will indicate a start or stop condition as defined  
below.  
START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which  
must precede any other command (see Figure 4-4 on page 7).  
STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a  
read sequence, the stop command will place the EEPROM in a standby power mode (see Fig-  
ure 4-4 on page 7).  
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the  
EEPROM in 8-bit words. The EEPROM sends a zero to acknowledge that it has received each  
word. This happens during the ninth clock cycle.  
STANDBY MODE: The AT34C02C features a low-power standby mode which is enabled: (a)  
upon power-up or (b) after the receipt of the STOP bit and the completion of any internal  
operations.  
MEMORY RESET: After an interruption in protocol, power loss or system reset, any Two-wire  
part can be reset by following these steps:  
(a) Clock up to 9 cycles, (b) look for SDA high in each cycle while SCL is high and then (c) create  
a start condition.  
Figure 4-1. Bus Timing SCL: Serial Clock SDA: Serial Data I/O  
6
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
Figure 4-2. Write Cycle Timing SCL: Serial Clock SDA: Serial Data I/O  
SCL  
ACK  
SDA  
8th BIT  
WORDn  
(1)  
wr  
t
START  
STOP  
CONDITION  
CONDITION  
Note:  
1. The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle.  
Figure 4-3. Data Validity  
Figure 4-4. Start and Stop Condition  
7
5185D–SEEPR–1/08  
Figure 4-5. Output Acknowledge  
5. Device Addressing  
The 2K EEPROM device requires an 8-bit device address word following a start condition to  
enable the chip for a read or write operation (see Figure 8-1 on page 13).  
The device address word consists of a mandatory one-zero sequence for the first four most-sig-  
nificant bits (1010) for normal read and write operations and 0110 for writing to the write protect  
register.  
The next 3 bits are the A2, A1 and A0 device address bits for the AT34C02C EEPROM. These 3  
bits must compare to their corresponding hard-wired input pins.  
The eighth bit of the device address is the read/write operation select bit. A read operation is ini-  
tiated if this bit is high and a write operation is initiated if this bit is low.  
Upon a compare of the device address, the EEPROM will output a zero. If a compare is not  
made, the chip will return to a standby state. The device will not acknowledge if the write protect  
register has been programmed and the control code is 0110.  
6. Write Operations  
BYTE WRITE: A write operation requires an 8-bit data word address following the device  
address word and acknowledgment. Upon receipt of this address, the EEPROM will again  
respond with a zero and then clock in the first 8-bit data word. Following receipt of the 8-bit data  
word, the EEPROM will output a zero and the addressing device, such as a microcontroller,  
must terminate the write sequence with a stop condition. At this time the EEPROM enters an  
internally-timed write cycle, tWR, to the nonvolatile memory. All inputs are disabled during this  
write cycle and the EEPROM will not respond until the write is complete (see Figure 8-2 on page  
13).  
The device will acknowledge a write command, but not write the data, if the software or hard-  
ware write protection has been enabled. The write cycle time must be observed even when the  
write protection is enabled.  
PAGE WRITE: The 2K device is capable of 16-byte page write.  
8
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
A page write is initiated the same as a byte write, but the microcontroller does not send a stop  
condition after the first data word is clocked in. Instead, after the EEPROM acknowledges  
receipt of the first data word, the microcontroller can transmit up to fifteen more data words. The  
EEPROM will respond with a zero after each data word received. The microcontroller must ter-  
minate the page write sequence with a stop condition (see Figure 1 on page 13).  
The data word address lower four bits are internally incremented following the receipt of each  
data word. The higher data word address bits are not incremented, retaining the memory page  
row location. When the word address, internally generated, reaches the page boundary, the fol-  
lowing byte is placed at the beginning of the same page. If more than sixteen data words are  
transmitted to the EEPROM, the data word address will “roll over” and previous data will be  
overwritten. The address “roll over” during write is from the last byte of the current page to the  
first byte of the same page.  
The device will acknowledge a write command, but not write the data, if the software or hard-  
ware write protection has been enabled. The write cycle time must be observed even when the  
write protection is enabled.  
ACKNOWLEDGE POLLING: Once the internally-timed write cycle has started and the  
EEPROM inputs are disabled, acknowledge polling can be initiated. This involves sending a  
start condition followed by the device address word. The read/write bit is representative of the  
operation desired. Only if the internal write cycle has completed will the EEPROM respond with  
a zero allowing the read or write sequence to continue.  
7. Write Protection  
The software write protection, once enabled, write protects only the first-half of the array (00H -  
7FH) while the hardware write protection, via the WP pin, is used to protect the entire array.  
PERMANENT SOFTWARE WRITE PROTECTION: The software write protection is enabled by  
sending a command, similar to a normal write command, to the device which programs the per-  
manent write protect register. This must be done with the WP pin low. The write protect register  
is programmed by sending a write command with the device address of 0110 instead of 1010  
with the address and data bit being don’t cares (see Figure 7-1 on page 10). Once the software  
write protection has been enabled, the device will no longer acknowledge the 0110 control byte.  
The software write protection cannot be reversed even if the device is powered down. The write  
cycle time must be observed.  
REVERSIBLE SOFTWARE WRITE PROTECTION: The reversible software write protection is  
enabled by sending a command, similar to a normal write command, to the device which pro-  
grams the reversible write protect register. This must be done with the WP pin low. The write  
protect register is programmed by sending a write command 01100010 with pins A2 and A1 tied  
to ground or don't connect and pin A0 connected to VHV (see Figure 7-2). The reversible write  
protection can be reversed by sending a command 01100110 with pin A2 tied to ground or no  
connect, pin A1 tied to VCC and pin A0 tied to VHV (see Figure 7-3).  
HARDWARE WRITE PROTECTION: The WP pin can be connected to VCC, GND, or left float-  
ing. Connecting the WP pin to VCC will write protect the entire array, regardless of whether or not  
the software write protection has been enabled. The software write protection register cannot be  
programmed when the WP pin is connected to VCC. If the WP pin is connected to GND or left  
floating, the write protection mode is determined by the status of the software write protect  
register.  
9
5185D–SEEPR–1/08  
Figure 7-1. Setting Permanent Write Protect Register (PSWP)  
S
CONTROL  
BYTE  
WORD  
ADDRESS  
T
A
R
T
S
T
DATA  
DATA  
DATA  
O
P
SDA LINE  
0 1  
1 0 A2 A1 A0 0  
A
C
K
A
C
K
A
C
K
= Don't Care  
Figure 7-2. Setting Reversible Write Protect Register (RSWP)  
S
CONTROL  
BYTE  
WORD  
ADDRESS  
T
A
R
T
S
T
O
P
SDA LINE  
0 1  
1 0 0 0 1 0  
A
C
K
A
C
K
A
C
K
= Don't Care  
Figure 7-3. Clearing Reversible Write Protect Register (RSWP)  
S
CONTROL  
BYTE  
WORD  
ADDRESS  
T
A
R
T
S
T
O
P
SDA LINE  
0 1  
1
0 0 1 1 0  
A
C
K
A
C
K
A
C
K
= Don't Care  
Table 7-1.  
Write Protection  
Pin  
Preamble  
RW  
B0  
0
Command  
Set PSWP  
Set RSWP  
Clear RSWP  
A2  
A2  
0
A1  
A1  
0
A0  
B7  
0
B6  
1
B5  
1
B4  
0
B3  
A2  
0
B2  
B1  
A0  
1
A0  
A1  
0
VHV  
VHV  
0
1
1
0
0
0
1
0
1
1
0
0
1
1
0
Table 7-2.  
VHV  
Min  
Max  
10  
Units  
VHV  
7
V
Note:  
VHV - VCC > 4.8V  
10  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
Table 7-3.  
WP Connected to GND or Floating  
WP Connected to GND or Floating  
Permanent  
Write Protect  
Register  
Reversible  
Write Protect  
Acknowledgme  
Command  
1010  
R/W Bit  
PSWP  
Register RSWP  
nt from Device  
Action from Device  
R
W
W
W
X
Programmed  
X
X
X
ACK  
ACK  
ACK  
ACK  
1010  
Can write to second Half (80H - FFH) only  
Can write to second Half (80H - FFH) only  
Can write to full array  
1010  
Programmed  
Not Programmed  
1010  
Not Programmed  
STOP - Indicates permanent write protect register is  
programmed  
Read PSWP  
Read PSWP  
Set PSWP  
Set PSWP  
R
R
Programmed  
Not Programmed  
Programmed  
X
X
X
X
No ACK  
ACK  
Read out data don't care. Indicates PSWP register  
is not programmed  
STOP - Indicates permanent write protect register is  
programmed  
W
W
No ACK  
ACK  
Program permanent write protect register  
(irreversible)  
Not Programmed  
STOP - Indicates reversible write protect register is  
programmed  
Read RSWP  
Read RSWP  
R
R
X
X
Programmed  
No ACK  
ACK  
Read out data don't care. Indicates RSWP register  
is not programmed  
Not Programmed  
STOP - Indicates reversible write protect register is  
programmed  
Set RSWP  
Set RSWP  
Clear RSWP  
W
W
W
X
X
Programmed  
Not Programmed  
X
No ACK  
ACK  
Program reversible write protect register (reversible)  
STOP - Indicates permanent write protect register is  
programmed  
Programmed  
No ACK  
Clear (unprogram) reversible write protect register  
(reversible)  
Clear RSWP  
W
Not Programmed  
X
ACK  
Table 7-4.  
WP Connected to Vcc  
WP Connected to Vcc  
Comman  
Permanent  
Write Protect  
Reversible  
Write Protect  
Acknowledgme  
d
R/W Bit Register PSWP Register RSWP  
nt from Device  
Action from Device  
Read array  
1010  
1010  
R
X
X
X
X
ACK  
ACK  
W
Device Write Protect  
Read  
PSWP  
STOP - Indicates permanent write protect register is  
programmed  
R
R
Programmed  
X
X
No ACK  
ACK  
Read  
PSWP  
Read out data don't care. Indicates PSWP register is  
not programmed  
Not Programmed  
11  
5185D–SEEPR–1/08  
WP Connected to Vcc  
STOP - Indicates permanent write protect register is  
programmed  
Set PSWP  
Set PSWP  
W
W
Programmed  
X
X
No ACK  
ACK  
Not Programmed  
Cannot program write protect registers  
Read  
RSWP  
STOP - Indicates reversible write protect register is  
programmed  
R
R
X
X
Programmed  
No ACK  
ACK  
Read  
RSWP  
Read out data don't care. Indicates RSWP register is  
not programmed  
Not Programmed  
STOP - Indicates reversible write protect register is  
programmed  
Set RSWP  
Set RSWP  
W
W
W
X
X
Programmed  
Not Programmed  
X
No ACK  
ACK  
Cannot program write protect registers  
Clear  
RSWP  
STOP - Indicates permanent write protect register is  
programmed  
Programmed  
No ACK  
Clear  
RSWP  
W
Not Programmed  
X
ACK  
Cannot write to write protect registers  
8. Read Operations  
Read operations are initiated the same way as write operations with the exception that the  
read/write select bit in the device address word is set to one. There are three read operations:  
current address read, random address read and sequential read.  
CURRENT ADDRESS READ: The internal data word address counter maintains the last  
address accessed during the last read or write operation, incremented by one. This address  
stays valid between operations as long as the chip power is maintained. The address “roll over”  
during read is from the last byte of the last memory page to the first byte of the first page.  
Once the device address with the read/write select bit set to one is clocked in and acknowledged  
by the EEPROM, the current address data word is serially clocked out. To end the command,  
the microcontroller does not respond with an input zero but does generate a following stop con-  
dition (see Figure 8-3 on page 14).  
RANDOM READ: A random read requires a “dummy” byte write sequence to load in the data  
word address. Once the device address word and data word address are clocked in and  
acknowledged by the EEPROM, the microcontroller must generate another start condition. The  
microcontroller now initiates a current address read by sending a device address with the  
read/write select bit high. The EEPROM acknowledges the device address and serially clocks  
out the data word. To end the command, the microcontroller does not respond with a zero but  
does generate a following stop condition (see Figure 8-4 on page 14).  
SEQUENTIAL READ: Sequential reads are initiated by either a current address read or a ran-  
dom address read. After the microcontroller receives a data word, it responds with an  
acknowledge. As long as the EEPROM receives an acknowledge, it will continue to increment  
the data word address and serially clock out sequential data words. When the memory address  
limit is reached, the data word address will “roll over” and the sequential read will continue. The  
sequential read operation is terminated when the microcontroller does not respond with a zero  
but does generate a following stop condition (see Figure 8-5 on page 14).  
12  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
PERMANENT WRITE PROTECT REGISTER (PSWP) STATUS: To find out if the register has  
been programmed, the same procedure is used as to program the register except that the  
R/W bit is set to 1. If the device sends an acknowledge, then the permanent write protect  
register has not been programmed. Otherwise, it has been programmed and the device is  
permanently write protected at the first half of the array.  
Table 8-1.  
PSWP Status  
Pin  
Preamble  
RW  
B0  
1
Command  
A2  
A1  
A0  
B7  
B6  
B5  
B4  
B3  
B2  
B1  
Read PSWP  
A2  
A1  
A0  
0
1
1
0
A2  
A1  
A0  
REVERSIBLE WRITE PROTECT REGISTER(RSWP) STATUS: To find out if the register has  
been programmed, the same procedure is used as to program the register except that the  
R/W bit is set to 1. If the sends an device acknowledge, then the reversible write protect  
register has not been programmed. Otherwise, it has been programmed and the device is  
write protected (reversible) at the first half of the array.  
Figure 8-1. Device Address  
Figure 8-2. Byte Write  
Figure 1. Page Write  
13  
5185D–SEEPR–1/08  
Figure 8-3. Current Address Read  
Figure 8-4. Random Read  
Figure 8-5. Sequential Read  
14  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
AT34C02C Ordering Information  
Ordering Code  
Package  
8S1  
Operation Range  
AT34C02CN-SH-B(1) (NiPdAu Lead Finish)  
AT34C02CN-SH-T(2)(NiPdAu Lead Finish)  
AT34C02C-TH-B(1) (NiPdAu Lead Finish)  
AT34C02C-TH-T(2) (NiPdAu Lead Finish)  
AT34C02CY6-YH-T(2)(NiPdAu Lead Finish)  
AT34C02CU3-UU-T(2)  
8S1  
Lead-free/Halogen-free/  
Industrial Temperature  
8A2  
8A2  
(–40°C to 85°C)  
8Y6  
8U3-1  
Notes: 1. “-B” denotes bulk.  
2. “-T” denotes tape and reel. SOIC = 4K per reel; TSSOP, Ultra Thin Mini MAP and dBGA2 = 5K per reel.  
Package Type  
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC)  
8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)  
8-lead, 2.00 mm x 3.00 mm Body, 0.50 mm Pitch, Ultra Thin Mini-MAP, Dual No Lead Package (DFN), (MLP 2x3 mm)  
8-ball, die Ball Grid Array Package (dBGA2)  
8S1  
8A2  
8Y6  
8U3-1  
Options  
–1.7  
Low Voltage (1.7V to 5.5V)  
15  
5185D–SEEPR–1/08  
9. New part marking  
9.3  
8-TSSOP  
TOP MARK  
Pin 1 Indicator (Dot)  
|
|---|---|---|---|  
*
H
Y
W
W
|---|---|---|---|---|  
1 *  
|---|---|---|---|---|  
3
4
C
BOTTOM MARK  
|---|---|---|---|---|---|---|  
Country of Origin  
Atmel Lot #  
C
0
0
|---|---|---|---|---|---|---|  
A
A
A
A
A
A
A
|---|---|---|---|---|---|---|  
<- Pin 1 Indicator  
Y = SEAL YEAR  
WW = SEAL WEEK  
6: 2006  
7: 2007  
8: 2008  
9: 2009  
0: 2010  
02 = Week 2  
04 = Week 4  
:: : :::: :  
:: : :::: ::  
50 = Week 50  
52 = Week 52  
1: 2011  
2: 2012  
3: 2013  
16  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
9.4  
8-SOIC  
Seal Year  
TOP MARK  
|
|
Seal Week  
|
|
|---|---|---|---|---|---|---|---|  
A
T
M
L
H
Y
W
W
|---|---|---|---|---|---|---|---|  
3
4
C
1
|---|---|---|---|---|---|---|---|  
Lot Number  
*
|---|---|---|---|---|---|---|---|  
|
Pin 1 Indicator (Dot)  
Y = SEAL YEAR  
WW = SEAL WEEK  
02 = Week 2  
04 = Week 4  
:: : :::: :  
:: : :::: ::  
50 = Week 50  
52 = Week 52  
6: 2006  
7: 2007  
8: 2008  
9: 2009  
0: 2010  
1: 2011  
2: 2012  
3: 2013  
Lot Number to Use ALL Characters in Marking  
BOTTOM MARK  
No Bottom Mark  
17  
5185D–SEEPR–1/08  
9.5  
8-Ultra Thin Mini MAP  
TOP MARK  
|---|---|---|  
3
4
C
|---|---|---|  
H
1
|---|---|---|  
Y
X
X
|---|---|---|  
*
|
Pin 1 Indicator (Dot)  
Y = YEAR OF ASSEMBLY  
XX = ATMEL LOT NUMBER TO COORESPOND WITH  
NSEB TRACE CODE LOG BOOK.  
(e.g. XX = AA, AB, AC,...AX, AY, AZ)  
Y = SEAL YEAR  
6: 2006  
7: 2007  
8: 2008  
9: 2009  
0: 2010  
1: 2011  
2: 2012  
3: 2013  
18  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
9.6  
dBGA2  
TOP MARK  
LINE 1------->  
LINE 2------->  
34CU  
YMTC  
|<-- Pin 1 This Corner  
Y = ONE DIGIT YEAR CODE  
4: 2004  
5: 2005  
6: 2006  
7: 2007  
8: 2008  
9: 2009  
M = SEAL MONTH (USE ALPHA DESIGNATOR A-L)  
A = JANUARY  
B = FEBRUARY  
" " """""""  
J = OCTOBER  
K = NOVEMBER  
L = DECEMBER  
TC = TRACE CODE (ATMEL LOT  
NUMBERS TO CORRESPOND  
WITH ATK TRACE CODE LOG BOOK)  
19  
5185D–SEEPR–1/08  
10. Packaging Information  
8S1 – JEDEC SOIC  
C
1
E
E1  
L
N
Top View  
End View  
e
B
COMMON DIMENSIONS  
(Unit of Measure = mm)  
A
MIN  
1.35  
0.10  
MAX  
1.75  
0.25  
NOM  
NOTE  
SYMBOL  
A1  
A
A1  
b
0.31  
0.17  
4.80  
3.81  
5.79  
0.51  
0.25  
5.00  
3.99  
6.20  
C
D
E1  
E
D
Side View  
e
1.27 BSC  
L
0.40  
0˚  
1.27  
8˚  
Note:  
These drawings are for general information only. Refer to JEDEC Drawing MS-012, Variation AA for proper dimensions, tolerances, datums, etc.  
10/7/03  
REV.  
TITLE  
DRAWING NO.  
1150 E. Cheyenne Mtn. Blvd.  
Colorado Springs, CO 80906  
8S1, 8-lead (0.150" Wide Body), Plastic Gull Wing  
8S1  
B
R
Small Outline (JEDEC SOIC)  
20  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
8A2 – TSSOP  
3
2 1  
Pin 1 indicator  
this corner  
E1  
E
L1  
N
L
Top View  
End View  
COMMON DIMENSIONS  
(Unit of Measure = mm)  
MIN  
MAX  
NOM  
3.00  
NOTE  
SYMBOL  
D
2.90  
3.10  
2, 5  
A
b
E
6.40 BSC  
4.40  
E1  
A
4.30  
4.50  
1.20  
1.05  
0.30  
3, 5  
4
A2  
b
0.80  
0.19  
1.00  
e
A2  
D
e
0.65 BSC  
0.60  
L
0.45  
0.75  
Side View  
L1  
1.00 REF  
Notes: 1. This drawing is for general information only. Refer to JEDEC Drawing MO-153, Variation AA, for proper dimensions, tolerances,  
datums, etc.  
2. Dimension D does not include mold Flash, protrusions or gate burrs. Mold Flash, protrusions and gate burrs shall not exceed  
0.15 mm (0.006 in) per side.  
3. Dimension E1 does not include inter-lead Flash or protrusions. Inter-lead Flash and protrusions shall not exceed 0.25 mm  
(0.010 in) per side.  
4. Dimension b does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.08 mm total in excess of the  
b dimension at maximum material condition. Dambar cannot be located on the lower radius of the foot. Minimum space between  
protrusion and adjacent lead is 0.07 mm.  
5. Dimension D and E1 to be determined at Datum Plane H.  
5/30/02  
DRAWING NO.  
TITLE  
REV.  
2325 Orchard Parkway  
San Jose, CA 95131  
8A2, 8-lead, 4.4 mm Body, Plastic  
Thin Shrink Small Outline Package (TSSOP)  
B
8A2  
R
21  
5185D–SEEPR–1/08  
8Y6 – Mini-MAP  
A
D2  
b
((88XX))  
Pin 11  
Inddeexx  
Areaa  
Pin 1 ID  
L (8X)  
D
e (6X)  
A2  
A1  
1.500 RREEFF..  
A3  
COMMON DIMENSIONS  
(Unit of Measure = mm)  
MIN  
MAX  
NOM  
2.00 BSC  
3.00 BSC  
1.50  
NOTE  
SYMBOL  
D
E
D2  
E2  
A
1.40  
1.60  
1.40  
0.60  
0.05  
0.55  
-
-
-
-
A1  
A2  
A3  
L
0.0  
-
0.02  
-
0.20 REF  
0.30  
0.20  
0.20  
0.40  
0.30  
e
0.50 BSC  
0.25  
b
2
Notes:  
1. This drawing is for general information only. Refer to JEDEC Drawing MO-229, for proper dimensions,  
tolerances, datums, etc.  
2. Dimension b applies to metallized terminal and is measured between 0.15 mm and 0.30 mm from the terminal tip. If the  
terminal has the optional radius on the other end of the terminal, the dimension should not be measured in that radius area.  
3. Soldering the large thermal pad is optional, but not recommended. No electrical connection is accomplished to the  
device through this pad, so if soldered it should be tied to ground  
10/16/07  
DRAWING NO. REV.  
TITLE  
2325 Orchard Parkway  
San Jose, CA 95131  
8Y6, 8-lead 2.0 x 3.0 mm Body, 0.50 mm Pitch, Utlra Thin Mini-Map,  
Dual No Lead Package (DFN) ,(MLP 2x3)  
8Y6  
D
R
22  
AT34C02C  
5185D–SEEPR–1/08  
AT34C02C  
8U3-1 – dBGA2  
E
D
1.  
b
A1  
PIN 1 BALL PAD CORNER  
A2  
Top View  
A
PIN 1 BALL PAD CORNER  
Side View  
1
2
3
4
(d1)  
d
7
6
5
8
e
COMMON DIMENSIONS  
(Unit of Measure = mm)  
(e1)  
MIN  
0.71  
0.10  
0.40  
0.20  
MAX  
NOM  
0.81  
NOTE  
SYMBOL  
Bottom View  
8 SOLDER BALLS  
A
0.91  
0.20  
0.50  
0.30  
A1  
A2  
b
0.15  
0.45  
0.25  
2
D
1.50 BSC  
2.00 BSC  
0.50 BSC  
0.25 REF  
1.00 BSC  
0.25 REF  
1. This drawing is for general information only.  
2. Dimension ‘b’ is measured at maximum solder ball diameter  
E
e
e1  
d
d1  
6/24/03  
TITLE  
REV.  
DRAWING NO.  
1150 E. Cheyenne Mtn. Blvd.  
Colorado Springs, CO 80906  
8U3-1, 8-ball, 1.50 x 2.00 mm Body, 0.50 mm pitch,  
PO8U3-1  
A
R
Small Die Ball Grid Array Package (dBGA2)  
23  
5185D–SEEPR–1/08  
11. Revision History  
Doc. Rev.  
Date  
Comments  
5185D  
5185C  
5185B  
1/2008  
Removed ‘preliminary’ status  
Updated to new template  
8/2007  
3/2007  
Added Package Marking tables  
Implemented revision history  
24  
AT34C02C  
5185D–SEEPR–1/08  
Headquarters  
International  
Atmel Corporation  
2325 Orchard Parkway  
San Jose, CA 95131  
USA  
Tel: 1(408) 441-0311  
Fax: 1(408) 487-2600  
Atmel Asia  
Room 1219  
Chinachem Golden Plaza  
77 Mody Road Tsimshatsui  
East Kowloon  
Hong Kong  
Tel: (852) 2721-9778  
Fax: (852) 2722-1369  
Atmel Europe  
Le Krebs  
Atmel Japan  
9F, Tonetsu Shinkawa Bldg.  
1-24-8 Shinkawa  
Chuo-ku, Tokyo 104-0033  
Japan  
Tel: (81) 3-3523-3551  
Fax: (81) 3-3523-7581  
8, Rue Jean-Pierre Timbaud  
BP 309  
78054 Saint-Quentin-en-  
Yvelines Cedex  
France  
Tel: (33) 1-30-60-70-00  
Fax: (33) 1-30-60-71-11  
Product Contact  
Web Site  
Technical Support  
Sales Contact  
www.atmel.com  
s_eeprom@atmel.com  
www.atmel.com/contacts  
Literature Requests  
www.atmel.com/literature  
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any  
intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI-  
TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY  
WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR  
PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDEN-  
TAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT  
OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no  
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otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use  
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©2008 Atmel Corporation. All rights reserved. Atmel®, logo and combinations thereof, and others, are registered trademarks or trademarks  
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5185D–SEEPR–1/08  

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