Datasheet > ATA5558_09

ATA5558_09

更新时间： 2022-12-27 23:39:15

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
52页	1177K
描述
1 kbit R/W IDIC with Deterministic Anticollision

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ATA5558_09 数据手册

The ATA5558 receives commands from the interrogator (downlink) as a 1 out of 4 pulse interval

encoded, amplitude modulated signal. Return data transmission from the tag to the interrogator

(uplink) utilizes either Manchester, Bi-phase or NRZ encoded amplitude modulation. This is

achieved by controlled damping of the interrogator’s RF field with an on-chip resistive load

between the two tag terminals, Coil 1 and Coil 2. Multi-Tag identification is implemented using a

deterministic anticollision algorithm which requires unique tag identification information (Tag

ID’s). Three blocks within the system memory are reserved for storage of the Tag ID, the length

of which is user configurable up to a maximum of 96 bits.

Figure 1-2. System Block Diagram

Modulator

System memory

Coil 1

Mode register

User memory

(1 kbit EEPROM)

Controller

Input register

Anticollision logic

Coil 2

POR

HV generator

* mask option

2. Functional Blocks

2.1

Analog Front End

The analog front end (AFE) includes all circuitry directly associated with the coil interface. It gen-

erates the internal power supply and handles the data communication with the interrogator. It

consists of the following blocks:

• Rectifier to generate a DC supply voltage from the AC coil voltage

• Low-voltage regulator to provide an on-chip stabilized DC voltage

• Charge pump to generate the high voltage required for EEPROM programming

• On-chip tuning capacitor (mask option)

• Field clock extractor

• Field gap detector for data transmission from interrogator to tag

• Load switching between Coil 1/Coil 2 for data transmission from tag to interrogator

• Electrostatic discharge protection (ESD)

ATA5558

4681E–RFID–11/09

123 4 5 6 7...52

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