Instructions

NFC &

MIFARE & ISO14443AB & ISO15693 & ISO18000 & ISO7816 IC Card Module www.quio-rfid.de

3.3 JCP05 Communication Protocol

3.3.1 Data sent format

 Host send:

Length C.A. Command Data Checksum

 Length: 2 bytes, number of bytes from Length byte to the last byte of Data, MSB first,

length from 0x0004 to 0x01FE.

 C.A. (communication address): 1 byte, the address of UART or RS232C multi-device

communication, default address: 0x01; broadcast address: 0x00.

 Command: 1 byte, Application-layer command, please refers to Application-layer

protocol in detailes.

 Data: length depends on the command type, length from 0 to 510 bytes; depending on

the processor, and some models will be less than 510 bytes.

 Checksum: 1 byte, Exclusive OR (XOR) results from length byte to the last byte of

data.

3.3.2 Data returned format

 Success:

Length C.A. Command Data Checksum

 Failure:

Length C.A. Invert Command Checksum

NOTE: "Failure" means that the communication between module and card failed.

3.4 Data Returned Time

Slaves begin to execute the command once received host's commands. The executive time is

normally less than 100ms, depending on the command type. Some command executive time maybe

longer (say 60s, e.g. some CPU cards to generate a key pair command). The waiting time is decided

by the card and the command type. So the hosts need to set the waiting time according to the different

commands.