AS3910
Data Sheet - Application Information
Table 14. Configuration Register 4
Address # 04: Configuration Register 4 (ISO-14443B)
Bit
Name
Def.
Function
7
egt2
0
egt2 egt1 egt0 number of EGT
6
egt1
0
0
0
0
0
0
0
1
1
-
-
-
-
5
egt0
0
-
-
-
-
1
1
0
6
1
1
1
6
4
sof_0
0 0 → 10 etu, 1 → 11 etu
3
sof_1
0 0 → 2 etu, 1 → 3 etu
2
eof
0 0 → 10 etu, 1 → 11 etu
0 → no EGT after last character,
1
egt
0 1 → EGT after each character
0
Not used
type: RW
Comments
EGT time defined in number of etu
SOF, number of etu with logic 0 (10 or 11)
SOF, number of etu with logic 1 (2 or 3)
EOF, number of etu with logic 0 (10 or 11)
Note: Default setting is set at power up and after Set Default command.
Table 15. Configuration Register 5
Address # 05: Configuration Register 5
Bit
Name
Def.
Function
1 → PM demodulation
7
pmd
0 0 → AM demodulation
6
am
0 0 → OOK, 1 → AM
5
4
Not used
3
2
fifo_lr
0 0 → 28, 1 → 24
1
fifo_lt
0 0 → 4, 1 → 8
0
Not used
type: RW
Comments
AM/PM demodulation selection
Valid for Transparent mode. For ISO-14443 and
NFC modes, modulation type is set automatically
(ISO-14443A and NFC is OOK, ISO-14443B is AM)
(see Table 26)
FIFO water level for receive
FIFO water level for transmit
Note: Default setting is set at power up and after Set Default command.
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