ST95HF Datasheet, PDF (29/93 Pages) STMicroelectronics – Dedicated internal frame controller

ST95HF
Commands
Table 17. List of <Data> Send values for the SENDRECV command for different
protocols (continued)
Protocol Explanation
Command example
Comments
Send example
9370800
04 07
28
F8C8E
Command code
Length of entire data field
Data
Example of an NFC Forum Type 2
request sequence:
>>>0x04022607 (REQA)
<<<0x800544002800 (ATQA)
>>>0x0403932008 (Anti-collision CL1)
<<<0x80088804A8D5F1280000 (UID
CL1)...
ISO/IEC
14443
Type A
NFC
Forum Tag
Type 4A
NFC
Forum Tag
Type 1
(Topaz)
NFC
Forum Tag
Type 2
Transmission flags:
7: Topaz send format. Use EOF instead of
parity bit and use SOF at beginning of each
byte. Pause between bytes and assume 1st
byte is 7 bits.
6: SplitFrame
5: Append CRC
4: Parity Framing mode ⁽²⁾
[3:0]: Number of significant bits in last byte
Example of an NFC Forum Type 1
(Topaz) request sequence:
>>>0x04022607 (REQA)
<<<0x8005000C280000 (ATQ0 ATQ1)
>>>0x040878000000000000A8 (RID)
<<<0x800B11486E567A003E450800
00 (Header0 Header1 UID0 UID 1 UID2
UID3 CRC0 CRC1Signifcant bits
indexColbyte IndexColbit)
Application SW must specify how many
bits to send in the last byte. If flag
SplitFrame is set, ST95HF will expect
8 – <significant bit count> bits in the 1^st
byte during reception.
In this case, the first byte received is
padded with zeros in lsb to complete the
byte, while the last byte received is
padded with zeros in msb.
Example of an anti-collision command
/response in ISO/IEC 14443_A
communication using a Split frame: ⁽¹⁾
>>> 0x0403932008 (Anticol)
<<< 0x800888047B75B7B80204
(Collision Detected B8)
>>> 0x0406934588040B45 (Anticol
Split frame request 45)
<<< 0x80064074B3230000 (Spilt
frame Answer 23)
ISO/IEC
14443
Type B
NFC
Forum Tag
Type 4B
Send example 04 03
Command code
Length of entire data field
Data
050000
This command is useful for anti-collision.
Example of an NFC Forum Type 4B
request sequence:
>>>0x0403050000 (REQB)
<<<0x800F5077FE01B30000000000
71718EBA00 (ATQB)
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