User's Manual

Coupler - Reference manual
RM 11
Version 1.1
b3: Send Signature:
1: Send a cryptographic signature calculated thanks to the coupler security module.
This option may be used only for UPDATE command performed on secure PICO
family chip. Set this value to 0 for non secure chip or any other manufacturer chips
0: Cryptographic signature is not sent.
b2 : HOST - COUPLER protocol type
1 : Communication is ISO IN-OUT. Coupler send back the data as soon as it
receives chip answer.
0 : Commucation between HOST and coupler follows the ISO 78-16 T=0 protocol.
Thus TRANSMIT command is only ISO IN, and user has to use the GET REPONSE
command to retrieve chip DATA from the coupler.
b1-b0: Protocol type:
Defines the contactless communication protocol number to be used. When
coupler’s EEPROM is set with the default values, the protocol types are as follows:
Contactless Communication Protocol
00 ISO14 443 B PICO family chips
01 ISO15 693 PICO family chips
10 ISO14 443 B-3
11 User protocol (default value : ISO 14 443 A-3)
P2 : Number of data bytes received from the chip after transmission of the
command.
If the Compare CRC bit of P1 is enabled, P2 should not include the CRC bytes.
Note: P2<=35 (23h).
P3 : Number of bytes in the data field of the command.
If the Send CRC or the Send Signature bit of P1 is enabled, P3 should not include the
CRC bytes or the signature.
Note: P3<=32 (20h).
Data: Commands and data to send to the chip
All PICOTAG commands are detailed in PICOTAG datasheet.
Response:
$ Chip answer
$ Status word.