AS39513 datasheet(12/108 Pages) AMSCO

12 / 108 page

Page 12

ams Datasheet

Document Feedback

[v1-10] 2018-Apr-25

AS39513 − Detailed Description

Processing and Digital Control

The AS39513 is fully ISO15693 compliant. The processing of the

incoming data is executed by the ISO15693 CODEC block that

formats the data in a frame according to the ISO specification.

Both data coding modes (1 out of 256 and 1 out of 4) are

supported by the AS39513. The reader (interrogator) makes the

mode selection as part of 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 requiring 302.08 μs.

This RFID interface can be used to access most of the EEPROM

storage and to control the operating mode of the AS39513.

Slave Serial Interface (SPI-like)

The integrated serial interface (SPI-like) can be used to

configure and test the chip.

The SPI-like bus can also be used for the communication

between a microcontroller externally attached to the AS39513.

With the correct access password, it can also be used to access

all regions of the EEPROM and the AS39513 test modes.

Please note SPI enable is active high. The SPI Read command

also has 2 timing issues which need to be observed and are

explained in the section SPI timing.

Real-Time Clock (RTC)

The on-chip real-time clock (RTC) is an integrating RC-type

oscillator that is factory trimmed to fRTC. This oscillator is used

to generate logging intervals tLOGINT and track the time since

the chip was first initialized. The start time for the logging

process can be programmed in UPC format by writing the

related parameter in the EEPROM configuration.

AS39513 Fiches technique(PDF) 12 Page - ams AG