CHIPDRIVE CLOUD 4700F 905511 数据表

 

The credential exposes its ATS or application information which is mapped to an ATR. The 
table describes how this mapping is done. 

0 

0x3B 

Initial header 

 

1 

0x8n 

T0 

n indicates the number of historical bytes in following ATR  

2 

0x80 

TD1 

upper nibble 8 indicates no TA2, TB2, TC2 
lower nibble 0 means T=0 

3 

0x01 

TD2 

upper nibble 0 indicates no TA3, TB3, TC3 
lower nibble 1 means T=1 

4...3+n   

Historical 
bytes or 
application 
information 

Type A: the historical bytes from the ATS (up to 15 bytes) 
Type B (8 bytes):  

x 

Byte 0 through 3: application data from ATQB, 

x 

Byte 4 through 6: protocol info byte from ATQB,

x 

Byte 7: highest nibble is the MBLI (maximum buffer 
length index) from ATTRIB, lowest nibble is 0x0

4+n 

 

TCK 

XOR of all previous bytes 

 

 
Example of the ATR built for an ISO14443-4 credential: 

Type A 

Type B