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參數(shù)資料
| 型號： | CRX14 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Short Range Contactless Coupler Chip(短程遙控的耦合器芯片) |
| 中文描述： | 短距離非接觸耦合器芯片（短程遙控的耦合器芯片） |
| 文件頁數(shù)： | 3/4頁 |
| 文件大小： | 32K |
| 代理商： | CRX14 |
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CRX14
The CRX14 is organized in four blocks:
– The I2C bus controller handles the serial con-
nection with the application host. It is compliant
with the 400kHz I2C bus specification and it con-
trols the read/write access to all the CRX14 reg-
isters.
– The RAM buffer is bi-directional. It stores all the
request frame bytes to be transmitted to the tag
and all received bytes send by the tag on the an-
swer frame.
– The transmitter powers all the contactless tags,
within range, by generating a RF magnetic field
at 13.56MHz on an external antenna. The field
is 10% modulated using ASK (amplitude shift
keying) modulation for outgoing data.
– The receiver demodulates the signal generated
on the antenna by the load variation of the con-
tactless tag. The resulting signal is decoded by
a 847KHz BPSK (binary phase shift keying)
sub-carrier decoder.
The CRX14 is designed to be connected to a dig-
ital host (Microcontroller or ASIC) which has to
manage all the communication protocol in both
transmit and receive mode through the I2C serial
bus.
CRX14 DEVICE OPERATION
The CRX14 chip coupler provides four volatile reg-
isters. They control all the behaviour of the device
and are described in Table 2.
Table 2. CRX14 Control Registers
PART NUMBERING
For a list of available options (speed, package,
etc.) or for further information on any aspect of this
device, please contact your nearest ST Sales Of-
fice.
Table 3. Ordering Information Scheme
I2C Address
Access
Purpose
00h
Parameters register
W
Set parameter register
R
Read parameter register
01h
Input/Output frame register
W
Store and send request frame to the tag.
Store tag answer frame
R
Transfer register content to Host
02h
Authenticate register
W
Start the Authenticate process
R
Get the Authenticate status
03h
Slot Marker register
W
Launch the automated anti-collision process
R
Not Applicable. Return data FFh.
Example:
CRX14
–
MQ
/
XX
Device Type
CRX14
Package
MQ = SO16 (150 mil width)
Customer Code
XX = Given by the issuer
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|---|---|
| CRX14_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost ISO14443 type-B Contactless Coupler Chip with Anti-Collision, CRC Management and Anti-Clone Function |
| CRX14_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ISO14443 type-B contactless coupler chip with anti-collision, CRC management and anti-clone function |
| CRX14-MQ | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost ISO14443 type-B Contactless Coupler Chip with Anti-Collision, CRC Management and Anti-Clone Function |
| CRX14-MQ/1GE | 制造商:STMicroelectronics 功能描述:CONTLESS COUPLER CHIP 16PIN SO - Rail/Tube 制造商:STMicroelectronics 功能描述:Non-contact card interface |
| CRX14-MQ/1XEB | 制造商:STMicroelectronics 功能描述:CONTLESS COUPLER CHIP 16PIN SO - Rail/Tube |
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