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參數(shù)資料
| 型號： | AT24RF08C |
| 廠商： | Atmel Corp. |
| 英文描述： | Asset Identification EEPROM(雙存取EEPROM（帶一個有線串行端口和一個無線RFID端口）) |
| 中文描述： | 資產(chǎn)識別的EEPROM（雙存取的EEPROM（帶一個有線串行端口和一個無線RFID的端口）） |
| 文件頁數(shù)： | 2/21頁 |
| 文件大?。?/td> | 429K |
| 代理商： | AT24RF08C |
AT24RF08C
2
General Overview
The AT24RF08C is intended to be pin compatible with
standard serial EEPROM devices except for pins 1, 2 and
3, which are address pins in the standard part. Other
exceptions to the AT24C08 Serial EEPROM data sheet are
noted in the
“
Serial EEPROM Exceptions
”
section later in
this document. Connection of an external coil antenna and
optional tuning capacitor, normally via a two conductor
wire, is all that is required to complete the RFID hardware
requirements.
Throughout this document, the term
“
reader
”
is defined as
the base station that communicates with the chip. Under all
expected conditions, it actually serves as both a reader and
writer. The term
‘
tag
’
is used to indicate the chip when
operating as an RFID transponder with the coil attached.
All bits are sent to or read from the device, most significant
bit first, in a manner consistent with the AT24C08 Serial
EEPROM. The bit fields in this document are
correspondingly listed with the MSB on the left and the LSB
on the right.
EEPROM Organization
The EEPROM memory is broken up into 8
blocks
of 1K
bits (128 bytes) each. Within each block, the memory is
physically organized into 8
pages
of 128 bits (16 bytes)
each. In some instances, accesses take place on a 32-bit
(4 byte)
word
basis. In addition to these 8K bits, there are
two more 128-bit pages that are used to store the access
protection and ID information. There are a total of 8448 bits
of EEPROM memory available on the AT24RF08C.
Access protection (both read and write) is organized on a
block basis for blocks 1 through 7 and on a page and block
basis for block 0. Protection information for these blocks
and pages is stored in one of the additional pages of
EEPROM memory that is addressed separately from the
main data storage array. See
“
Access Protection
”
on page
3 for more details.
The ID value (see
“
ID Configuration
”
on page 7) is located
in the ID page of the EEPROM, the second of the additional
16 byte pages.
Writes from the serial port may include from one to 16
bytes at a time, depending on the protocol followed by the
bus master. Accesses to the EEPROM from the RFID port
are on either a word (32 bits) or page (128 bits) basis only.
All page accesses must be properly aligned to the internal
EEPROM page.
The EEPROM memory offers an endurance of 100,000
write cycles per byte, with 10 year data retention. Writes to
the EEPROM and tamper bit take less than 10 ms to
complete.
Completion time for writes initiated from the RFID port are
different depending on the situation. When external power
is supplied to the chip through the VCC pin, writes to the
EEPROM and tamper bit take less than 11.8 ms when
measured from the last modulation edge before the write to
the first after the write. When powered from the coil pins at
125 KHz, the EEPROM write time will be 5.8 ms and the
tamper write time will be 7.9 ms.
After manufacturing, all EEPROM bits except in the device
revision byte (see
“
Access Protection
”
page 5) will be set to
a value of 1 and the tamper bit will be set to 0.
Device Access
The third device address bit in the two wire protocol that is
usually matched to A
2
(pin 3) on a standard AT24C08 serial
EEPROM is internally connected high, so device
addresses A8 through AF (hex) are used to access the
memory on the chip. The general command encoding used
by the serial port for EEPROM accesses is shown below in
Device Access Examples, where B
2-0
is the block number,
P
2-0
is the page number within the block and A
3-0
is the byte
address within the page. Bits denoted as
“
x
”
are ignored by
the device.
The PROT pin is used as a power good signal. When this
pin is low, the serial port is held in reset and all sticky bits
are set to one. When high, activity on the serial bus is
permitted.
Device Access Examples
For Write Operations:
1 0 1 0 1 B
2
B
1
0
B
0
P
2
P
1
P
0
A
3
A
2
A
1
A
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
…
For Read Operations:
1 0 1 0 1 X X 1
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
…
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT24RF08 | 1K x 8 Dual Access EEPROM with RFID and Serial Interfaces |
| AT25010-10PI-1.8 | SPI Serial EEPROMs |
| AT25020-10PI-1.8 | SPI Serial EEPROMs |
| AT25040-10PI-1.8 | SPI Serial EEPROMs |
| AT25040N-10SC-1.8 | SPI Serial EEPROMs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT24RF08CN-105C | 功能描述:IC EEPROM 8KBIT 100KHZ 8SOIC 制造商:microchip technology 系列:- 包裝:管件 零件狀態(tài):停產(chǎn) 存儲器類型:非易失 存儲器格式:EEPROM 技術(shù):EEPROM 存儲容量:8Kb （1K x 8） 時鐘頻率:100kHz 寫周期時間 - 字，頁:10ms 訪問時間:450ns 存儲器接口:I2C 電壓 - 電源:2.4 V ~ 5.5 V 工作溫度:-40°C ~ 85°C（TJ） 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SOIC 基本零件編號:AT24RF08 標準包裝:1 |
| AT24RF08CN-10SC | 功能描述:電可擦除可編程只讀存儲器 RFID 8k RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| AT24RF08CN10SC-C0006 | 制造商:Atmel Corporation 功能描述:EEPROM |
| AT24RF08CT-10T1C | 制造商:Atmel Corporation 功能描述:1K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO14 |
| AT24RF08-EK | 功能描述:KIT EVAL FOR AT24RF08CN-10SC RoHS:否 類別:RF/IF 和 RFID >> 過時/停產(chǎn)零件編號 系列:- 標準包裝:1 系列:- 類型:用于 200/300 系列的歐盟開發(fā)套件 適用于相關(guān)產(chǎn)品:Zensys RF 模塊 所含物品:開發(fā)板，模塊，編程器，軟件，線纜，電源 其它名稱:703-1019Q3225667 |
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