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TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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February 1999 Rev. 1.2 Communication Reader-Host<br />

3.7.4 HT1_Select_Snr<br />

This command selects the HITAG 1 transponder with a specified serial number. The content of<br />

the transponder’s Configuration Page is returned.<br />

If there is no such transponder in the field, a NOTAG error message is displayed.<br />

ATTENTION: The serial number has to be the same as received with the preceding<br />

GetSnr.<br />

C-Function: void HT1_Select_Snr (DWORD_T snr, DWORD_T *otp);<br />

Header-File: Hitag1.H<br />

Serial protocol:<br />

HOST - READ/WRITE DEVICE<br />

7 0 ------ 31 24<br />

0x06 'S' SNR-LSB ------ SNR-MSB BCC<br />

READ/WRITE DEVICE - HOST<br />

7 0 ------ 31 24<br />

n+2 Status OTP-LSB ------ OTP-MSB BCC<br />

OTP: Configuration Page of HITAG 1<br />

n = 0 if an error occurred (error code in Status).<br />

n = 4 if data were read from a transponder (Status = 0).<br />

Status: 0 ... no error<br />

-1 ... SERIAL ERROR<br />

-3 ... NOTAG<br />

Page 19 (107)<br />

Protokoll HTRM801 V1.2/C

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