CLOUD
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F
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EFERENCE
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ANUAL
11
2.4.
Definition of various terms and acronyms
Term
Expansion
APDU
Application Protocol Data Unit
ATR
Answer to Reset, defined in ISO7816
ATS
Answer to select, defined in ISO/IEC 14443
Byte
Group of 8 bits
CCID
Chip Card Interface Device
CID
Card Identifier
DFU
Device Firmware Upgrade
DR
Divider receive: used to determine the baud rate between the reader to the card
DS
Divider send: used to determine the baud rate between the card to the reader
LED
Light emitting diode
MIFARE
The ISO14443 Type A with extensions for security (NXP)
NA
Not applicable
NAD
Node Address
Nibble
Group of 4 bits. 1 digit of the hexadecimal representation of a byte.
Example:
0xA3 is represented in binary as (10100011)b. The least significant nibble is
0x3 or (0011)b and the most significant nibble is 0xA or (1010)b
PCD
Proximity Coupling Device
PC/SC
Personal Computer/Smart Card: software interface to communicate between a PC
and a smart card
PICC
Proximity Integrated Chip Card
PID
Product ID
Proximity
Distance coverage till ~10 cm.
PUPI
Pseudo unique PICC identifier
RF
Radio Frequency
RFU
Reserved for future use
USB
Universal Serial Bus
VID
Vendor ID
(xyz)b
Binary notation of a number x, y, z
0,1
0xYY
The byte value YY is represented in hexadecimal