AS3991-BQFT austriamicrosystems, AS3991-BQFT Datasheet - Page 27

• 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 18. TRcal High and Miscellaneous Register (05)
1. Preset at por=H or EN=L
Delayed Transmission Wait Time (06)
Table 19. Delayed Transmission Wait Time (06)
1. Preset at por=H or EN=L
RX No Response Wait Time (07) – Defines the time when ‘No Response’ interrupt is sent.
Table 20. RX No Response Wait Time (07)
1. Preset at por=H or EN=L
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Gen2: 05
Gen2: 00
Gen2: 07 (179.2µs > 54.25µs…84.5µs + 10 periods – LF:160kHz)
Bit
Bit
Bit
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
NoResp7
NoResp6
NoResp5
NoResp4
NoResp3
NoResp2
NoResp1
NoResp0
open_dr
TRcal11
TRcal10
TRcal9
TRcal8
Txdel7
Txdel6
Txdel5
Txdel4
Txdel3
Txdel2
Txdel1
Txdel0
Open drain N-MOS outputs
Delayed transmission wait
1
No response wait time
1
Function
Function
TRcal time
Function
time
Revision 3.81
1
TX replay range 6.4µs to 1632µs (1…255), Start
at end of RX.
00: Delayed transmission is disabled.
Gen2: T2=4.68µs…500µs after end of RX,
Defines the time when ‘no response’ interrupt is
sent. It starts from the end of TX.
RX no response wait range is 25.6µs to 6528µs
(1…255),
Step size 25.6µs
Interrupt is sent in case the time runs out before
6-10 periods of link frequency is detected.
Gen2: T1max=23.6µs…262µs
Valid for CLSYS, OAD, OAD2 pins
Refer to register 04 description
Select T4>31.2…150µs after end of TX
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