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AS3953B Fiches technique(PDF) 1 Page - ams AG |
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AS3953B Fiches technique(HTML) 1 Page - ams AG |
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1 / 64 page  ams Datasheet Page 1 [v1-04] 2016-Jan-07 Document Feedback AS3953B 14443 High Speed Passive Tag Interface The AS3953B NFC interface IC (NFiC) delivers low cost, ultra low power NFC forum functionality to multiple different applications. The AS3953B is a analog front-end with integrated 14443A data framing and SPI interface. It is designed to create a fast data link between an ISO 14443A reader device (PCD) and a microcontroller. The AS3953B is passively powered meaning that it can be supplied from the PCD magnetic field, eliminating the need of a continual external supply. This makes the AS3953B perfect for wireless communication to a low-power battery powered device. The AS3953B is used with an appropriate antenna coil connected to the terminals LC1 and LC2, and behaves as a normal passive ISO 144443A tag (PICC). After the anti-collision protocol is passed, the PCD sends a Wake-Up command, which wakes up the microcontroller by sending an interrupt. From this point onwards, the AS3953B serves as a data link between the microcontroller and the PCD. AS3953B can also operate as NFCIP-1 target at 106kbit/s. The AS3953B includes an onboard EEPROM that can be accessed either from the PCD or from the microcontroller via the SPI interface. This built-in flexibility makes it ideal for two types of applications: • Where personalization data is programmed by the PCD (even in case the SPI side is not powered) and it is later read by microcontroller through SPI interface. • Where log data is stored periodically by the microcontroller and can then be read by the PCD even when the microcontroller is not powered. A regulated power supply voltage extracted from the PCD field is also available on a pin and can be used as power supply for external circuitry. For example, an external microcontroller and a sensor could be powered from the PCD field combined with pass through data rates up to 848kbit/s, which means the AS3953B is ideal for contactless passive programming of MCU systems. The AS3953B can also operate as a stand-alone ISO 14443A tag. The AS3953B supports ISO 14443A up to Level-4, meaning a contactless smart card or an NFC forum compatible tag (Tag Type 4) can be built. Having a NFC Forum compatible tag interface allows the AS3953B to be used in an application where a standard NFC enabled phone is used as a PCD. Ordering Information and Content Guide appear at end of datasheet. General Description |
Numéro de pièce similaire - AS3953B |
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Description similaire - AS3953B |
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