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SL13A Datasheet(PDF) 9 Page - ams AG |
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SL13A Datasheet(HTML) 9 Page - ams AG |
9 / 49 page ams Datasheet: 2014-May-06 [v1-01] SL13A – 9 Detaile d Desc rip t ion Processing and Digital Control The SL13A is fully ISO 15693 compliant. Both data coding modes (1 out of 256 and 1 out of 4) are supported by the SL13A. The reader (interrogator) makes mode selection within the SOF (Start of Frame). The 1-of-256 data coding mode has a data rate of 1.65 kbit/s (fc/8192) meaning that the transmission of one byte takes 4.833 ms. The 1-of-4 coding has a rate of 26.48 kbit/s (fc/512) with the transmission of one byte taken 302.08 μs. Figure 9: Response Data Rate Serial Interface (SPI) The integrated serial interface (SPI) can be used to read and write the embedded EEPROM and to set the parameters. The SPI interface is a secondary and test interface - the main interface is the RF ISO15693 interface. Real-Time Clock (RTC) The on-chip real-time clock (RTC) is started through the START -LOG command in which the start time is programmed in UTC format. The interval for sensing and data logging can be programmed in the range from 1 second up to 9 hours. The accuracy of the timer is ±3%. Temperature Sensor The on-chip temperature sensor can measure the temperature in the range from -20ºC to 60ºC within the specified accuracy. The reference voltage for the A/D conversion is supplied from an on chip calibrated Bandgap reference. External Sensor The external sensor pin (SEXT) can be used to connect an external sensor to the A/D converter. The voltage input range is 300mV – 600mV and is fixed. For extra low power applications the CE pin can switch the battery voltage for the time of the external sensor A/D converter, so the current from the battery into the sensor will flow only for this short time (max 5ms). This can be enabled when the External-sensor flag is set to 1 and the bit 19 in the Internal calibration data is set. Data Rate One Sub-carrier Two Sub-carrier Low 6.62 kbit/s (fc/2048) 6.67 kbit/s (fc/2032) High 26.48 kbit/s (fc/512) 26.69 kbit/s (fc/508) |
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