AS3991-BQFT austriamicrosystems, AS3991-BQFT Datasheet - Page 36

• 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
DAC Control Register (18)
Table 37. DAC Control Register (18)
1. Default: reset to 00 at por=H and EN=L
ADC Readout Register (19)
Table 38. ADC Readout Register (19)
RX Length Registers
RX Length 1 (1A)
Table 39. RX Length 1 (1A)
1. Default: reset to 00 at por=H, EN=L and at the end of successful reception
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Bit
Bit
Bit
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
Signal Name
Signal Name
Signal Name
fifo_dir_irq2
rx_crc_n2
dac<7>
dac<6>
dac<5>
dac<4>
dac<3>
dac<2>
dac<1>
dac<0>
adc<7>
adc<6>
adc<5>
adc<4>
adc<3>
adc<2>
adc<1>
adc<0>
rxl<9>
rxl<8>
RFU
1
1
Direct FIFO and 2
Receiving without CRC
DAC control value
ADC readout
RX length
Function
Function
Function
Revision 3.81
RFU
nd
byte IRQ
Via ADC the two mixers output DC levels
can be measured showing the reflectivity of
the antenna or the environment. Also DC
level on ADC pin can be measured. The
later case can be used for checking the RF
output power via external power detector.
The measurement is selected using
msel<2:0> bits. The measurement is
triggered by the ‘Trigger AD conversion’
command (87). Result is valid 20µs after
triggering.
Temporary receiving without CRC. Valid for
a single reception.
All bytes including CRC are transferred to
FIFO, irq_header is changed to irq_2
irq_err3 is changed to irq_RX_finished. For
PC+EPC reception
reserved for future use (RFU)
Comments
Comments
Comments
-
-
-
nd
36 - 51
byte,