AS3991-BQFT austriamicrosystems, AS3991-BQFT Datasheet - Page 25

• Manufacturer Part Number: AS3991-BQFT
• Description: IC UHF RFID READER 64-QFN
• Manufacturer: austriamicrosystems

Specifications of AS3991-BQFT

• Rf Type: Read / Write
• Frequency: 840MHz ~ 960MHz
• Features: ISO-18000-6
• Package / Case: 64-VFQFN, Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS3991-BQFT; AS3991-BQFTTR

AS3990/AS3991
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 13. Chip Status Control (00)
1. Reset to 00 at EN=L or POR=H
Protocol Control (01) – Controls the RFID protocol selection
Table 14. Protocol Control (01)
1. Preset to 06 (Gen2, Miller2, Tari=25µs) at EN=L or POR=H
Control Registers - Low Level Configuration Registers
TX Options (02) – Gen2
Table 15. TX Options (02)
1. Preset at por=H or EN=L
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Gen2: F0 (TxPW=0.5 Tari, TxOne=2 Tari)
Bit
Bit
Bit
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
Signal Name
Signal Name
Signal Name
dir_mode
RX_cod1
RX_cod0
rx_crc_n
TxOne1
TxOne0
rec_on
TxPw1
TxPw0
1
Prot1
Prot0
rf_on
Tari1
Tari0
S1
S0
-
-
1
1
Receiver enable
TX and RX enable
Receiving without CRC
Direct mode type
Protocol selection
RX decoding select (Gen2)
Tari (Gen2)
PW length control
TX one length control
don’t care
don’t care
Session bits
Function
Function
Function
Revision 3.81
Receiver is enabled
TX RF field and receiver are enabled
0: RX CRC (generate interrupt)
1: No RX CRC (interrupt and no CRC
truncation)
0: Output is bit stream and clock from the
selected decoder
1: Output is sub-carrier data.
00: EPC Gen2
10: ISO18000-6 Type A/B direct mode
decoder enable
00: FM0
01: Miller 2
10: Miller 4
11: Miller 8
00: Tari=6.25µs (Gen2)
01: Tari=12.5µs (Gen2)
10: Tari=25µs (Gen2)
00: 0.27Tari
01: 0.35Tari
10: 0.44Tari
11: 0.50Tari
00: 1.50Tari
01: 1.66Tari
10: 1.83Tari
11: 2.00Tari
Set to 0
Set to 0
Used for Gen 2 direct commands
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