AS3955 datasheet(59/111 Pages) AMSCO

Il numero della parte	AS3955

Spiegazioni elettronici	NFC Forum Compliant Dynamic Tag

PDF	111 Pages

Scroll/Zoom	100%

Produttore elettronici	AMSCO [ams AG]

Homepage	http://www.ams.com

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59 / 111 page

ams Datasheet

Page 59

[v1-01] 2015-Apr-29

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AS3955 − Detailed Description

Writing and Reading of EEPROM Through SPI

EEPROM data can be read and written also through SPI

interface. Due to possible conflict with the RFID interface

additional arbitration bit can be set (IC_CFG0) in order to set

the priority access to the EEPROM access. If EEPROM write

operation is terminated due to higher priority of the RF an

I_acc_err (Interrupt Register 1) IRQ is sent. The description is

referring to following case when an EEPROM write operation is

triggered via SPI / I²C and bit arbit_mod (EEPROM, IC_CFG0,

bit3) is set to 1 which means that RF has priority over SPI when

accessing EEPROM. In this case EEPROM via SPI / I²C write will

be terminated and IRQ I_acc_err is triggered if tags enters RF

field and EEPROM is needed for RF initialization, EPROM read or

write is issued via RF.

AS3955 Scheda tecnica(PDF) 59 Page - ams AG