AS3910-BQFP AMSCO [austriamicrosystems AG], AS3910-BQFP Datasheet - Page 29

• Manufacturer Part Number: AS3910-BQFP
• Description: 13.56 MHz RFID Reader IC, ISO-14443 A/B
• Manufacturer: AMSCO [austriamicrosystems AG]

AS3910
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Table 19. FIFO Status Register
Note: At power up and after direct commands, Set Default and Clear content of this register is set to 0.
Table 20. Collision Register
Note: At power up and after direct commands Set Default and Clear content of this register is set to 0.
Table 21. Number of Transmitted Bytes Register 0
Note: Bits frm4 and antcl are cleared after transmission is performed.
www.austriamicrosystems.com/HF_RFID_Reader/AS3910
Bit
Bit
Bit
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Default setting is set at power up and after Set Default command.
Address # 0A: Collision Register (for ISO-14443A only)
Name
nbtx2
nbtx1
nbtx0
c_byte3
c_byte2
c_byte1
c_byte0
fifo_ovr
antcl
frm4
Address # 0B: Number of Transmitted Bytes Register 0
ntx1
ntx0
Name
rx_act
Name
c_bit2
c_bit1
c_bit0
rfu
Address # 09: FIFO Status Register
FIFO overflow
Active receive. This bit is set to 1 when start of
transponder message is detected and stays high until
end of receive.
Number of full bytes before the bit collision happened
Number of bits before the collision in the byte where
the collision happened
Not used, always 0
Def.
0
0
0
0
0
0
0
Number of bytes to be transmitted in one command,
LSB bits
Number of bits in the split byte
000 means that all bytes all full
Not used
4bit response frame
ISO-14443 anticollision frame
Function
Function
Function
Revision 2.3
answering. See also Application Notes (Active receive).
By reading this bit it can be checked whether transponder is
Maximum supported number of bytes is 1023
Applicable only to ISO-14443A bit oriented
anticollision frame in case last byte is split byte
Has to be set to 1 when 4bit response frame is
expected (Mifare Ultralight)
Has to be set to 1 when ISO-14443A bit oriented
anticollision frame is sent
Comments
Comments
type: R
type: R
Comments
type: RW
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