ACM1252U-Y3
– Reference Manual
Version 1.03
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5.4.1.3.
Send ATR Request
This command is used to send an ATR_REQ to a peer-to-peer Target Mode device within the field.
ATR Request Command Format
Command
Class
INS
P1
P2
Lc
Data In
ATR
Request
E0h
00h
00h
42h
Len
11h
Mode
(1 byte)
Speed
(1 byte)
NFCID
(10 bytes)
DID
(1 byte)
Data In
BS
(1 byte)
BR
(1 byte)
PP
(1 byte)
LLCP Parameter
GiLen (1 byte)
Gi (GiLen bytes)
ATR Request Response Format
Response
Class
INS
P1
P2
Le
Data Out
Result
E1h
00h
00h
00h
Len
ATR Response (Len bytes)
Where:
Mode
1 byte. Operation Mode.
01h = Active
02h = Passive
Speed
1 byte. Communication Speed.
01h = 106 Kbps
02h = 212 Kbps
03h = 424 Kbps
NFCID
10 bytes. Initiator device
’s NFCID.
DID
1 byte. Initiator device
’s Device Identification.
BS
1 byte. Initiator device
’s support send-bit rates.
BR
1 byte. Initiator device
’s support bit rates.
PP
1 byte. Initiator device
’s optional parameters.
Gi
N bytes. LLCP parameter.