AS3910-BQFP 查看數據表（PDF） - austriamicrosystems AG

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AS3910-BQFP

13.56 MHz RFID Reader IC, ISO-14443 A/B

austriamicrosystems AG 

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.

www.austriamicrosystems.com/HF_RFID_Reader/AS3910

Revision 2.3

26 - 47

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