128
Appendix
NC: Not Connected
ND: Not Defined
NFC Tag
31
Host
Init
Init
Init
32
Printer
Fault
DataAvail/Data0,4
DataAvail
33
GND
ND
ND
34
Printer
DK_STATUS
ND
ND
35
Printer
+5V
ND
ND
36
Host
SelectIn
1284-Active
1284-Active
CAUTION
•
A signal name with a rule above it indicates an “L” active signal.
•
Bidirectional communications cannot take place, unless all signal names for both sides
correspond to each other.
•
Connect all signal lines using a twisted-pair cable. Connect the return side to the signal ground
level.
•
Make sure the signals satisfy electrical characteristics.
•
Set the leading edge and trailing edge times to 0.5ms or less.
•
Do not ignore Ack or BUSY signals during a data transfer. Ignoring such signals may result in
data corruption.
•
Make the interface cables as short as possible.
Transmission standard
ISO14443 A
Frequency
13.56 MHz
Memory
144 byte
Transmission distance
Approximately 10 mm from the NFC installation location.
•
The transmission distance is an estimate that depends on our experiment conditions and is not a
guaranteed value.
•
It varies based on the installation environment and target device.
Pin
Source
Compatibility Mode
Nibble Mode
Byte Mode