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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AS3955 데이터시트(PDF) 59 Page - ams AG |
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AS3955 데이터시트(HTML) 59 Page - ams AG |
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59 / 111 page  ams Datasheet Page 59 [v1-01] 2015-Apr-29 Document Feedback 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. |
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