SL13A datasheet(9/49 Pages) AMSCO

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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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