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參數(shù)資料
| 型號： | 935233940122 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | SPECIALTY TELECOM CIRCUIT, PXSS |
| 封裝： | 12 X 6 MM, 3 MM HEIGHT, PLASTIC, SOT-385-1 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大小： | 163K |
| 代理商： | 935233940122 |
HITAG 2 Transponders
Product Specification 3.0
July 2006
2 GENERAL DESCRIPTION
The HT2DC20S20 is a high performance transponder for bi-directional transmission in half
duplex mode between read/write device and transponder.
Data are stored in the transponder in a non-volatile memory (EEPROM). The transponder
requires no internal power supply; it derives its power from the magnetic component of the RF
carrier frequency generated by the reader. Data are transmitted by modulating this carrier.
The HT2DC20S20 is dedicated for use in secure access systems where the transponder and the
reader have to identify each other. The choosable use of cryptography enables highest data
security. Providing several operating modes (password, crypto, standard read only modes) the
versatile transponder can be used in various applications. The possible use of an installed reader
base for read only transponders makes the additional use of HT2DC20S20 or the replacement of
read only transponders by HT2DC20S20 very easy.
The HALT-command can be used after finishing data exchange to reach the halt-state. In this
state the transponder is muted. This feature can be used to have steady RF field where single
transponders are collected one by one. Each transponder is operated and then disabled so it does
not interfere with the next transponder. The halt-state can only be exited by switching
off/removing the magnetic field.
The EEPROM has a capacity of 256 Bits and is organized in 8 pages of 4 Bytes. The 8 pages are
split up into 4 pages containing user data and into 4 pages for control of the memory access and
for authentication purposes.
The pages of the transponder memory can be protected against read or write access by setting
corresponding memory flags.
Absorption modulation is used to transmit data from the transponder to the reader. The
transponder absorbs the magnetic field, which hence modulates the current in the reader antenna.
Data transmission to the HT2DC20S20 uses binary pulse length modulation (BPLM).
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