AS3991-BQFT austriamicrosystems, AS3991-BQFT Datasheet - Page 30

• 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 25. IRQ and Status Register (0C)
1. Preset to 00 at por=H or EN=L. It is automatically reset at the end of read phase. The reset also removes the
Interrupt Mask Register (0D)
Table 26. Interrupt Mask Register (0D)
1. Preset to 37 at por=H and EN=L
AGC and Internal Status Register (0E)
Table 27. AGC and Internal Status Register (0E)
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IRQ flag.
Bit
Bit
Bit
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
Irq_RX_finished
Signal Name
Signal Name
e_irq_header
Signal Name
e_irq_noresp
Irq_noresp
e_irq_err1
e_irq_err2
e_irq_err3
Irq_err3 /
e_irq_fifo
in_select
agc<3>
agc<2>
agc<1>
agc<0>
RFU
1
1
Preamble detect error /
RX finished
No response interrupt
When enabled, AS3990/AS3991 will generate an active high Interrupt when
the FIFO is getting low (8 Bytes left to send on transmit operation) or is
getting full over 16 bytes on receive operation.
When enabled, AS3990/AS3991 will generate an active high Interrupt when
the device detects an CRC error (This option will report no crc error when
receive without crc is enabled).
When enabled, AS3990/AS3991 will generate an active high Interrupt when
the device detects an error into the header Bit of the Tag reception.
When enabled, AS3990/AS3991 will generate an active high Interrupt when
the length of the received Bit stream from the Tag has been shorter than
expected in the RX length configuration. Such event occurs, for example, if
the Tag is not powered sufficiently.
When enabled, AS3990/AS3991 will generate an active high Interrupt in
case the device detects an error during preamble reception.
When enabled, AS3990/AS3991 will generate an active high Interrupt in
case no Tag has been answered.
AGC status (5dB per step)
Shows the source of the
subcarrier signal that is used
for decoding.
Function
Function
Function
Revision 3.81
RFU
Signals to MCU that there was an error
during preamble detection /
Rx is finished – in case
fifo_dir_irq2=1(reg1A)
Signals to MCU that next slot command can
be sent.
(8 steps, 5dB per step)
0: REC_A
1: REC_B
Value is valid from reception start till start of
next transmission
reserved for future use (RFU)
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