AS3991-BQFT austriamicrosystems, AS3991-BQFT Datasheet - Page 33

• 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 32. Test Setting (12)
1. Default: reset to 00 00 00 at por=H and EN=L
PLL, Modulator, DAC, and ADC Registers
CL_SYS, Analog Out and CP Control (14) – (three bytes deep)
Table 33. CL_SYS, Analog Out and CP Control (14)
www.austriamicrosystems.com
23:20
19:16
10:8
Bit
8:5
Bit
13
12
11
10
15
14
13
12
11
9
4
3
2
1
0
7
6
5
4
3
2
Signal Name
Signal Name
cnt_sig<1>
cnt_sig<0>
e_anasubc
eosc<2:0>
e_anamix
rssi_cont
subc_out
subc_in
test<1>
test<0>
agc_ud
digf_off
clsys1
clsys0
cp<3>
cp<2>
1
presc
vco_r
mvco
RFU
RFU
ozko
auto
h2
h6
RSSI continuous
AGC mode type
AS3991: Block rec. A out
AS3991: Block rec. B out
Digital filter off
RFU
Subcarrier input enable
Subcarrier output
Prescaler test
Additional test selection
Additional test selection
AS3991: manual VCO range selection
AS3991: automatic VCO range enable
AS3991: auto range selection speed-up
AS3991: auto range selection speed-up
AS3991: auto range selection mode
AS3991: VCO measurement enable
Internal oscillator bias current
CL_SYS output frequency
Analog mixer DC output on OAD/OAD2
Analog sub-carrier out on OAD/OAD2
VCO frequency dependence
int LF
Function
1
Revision 3.81
Function
RFU
For test purposes only. Should be low for
normal operation.
reserved for future use (RFU)
For test purposes only. Should be low for
normal operation.
reserved for future use (RFU)
Manual selection of the VCO range
segment. Used in case auto=0
L-H transition triggers the
automatic selection of the VCO
range segment
7 steps, Result in reg10
000: min. bias current (~1.8mA)
111: max. bias current (~7mA)
00: Off
01: 5MHz
10: 10MHz
11: 20MHz
0: increasing with VCO voltage
1: decreasing with VCO voltage
Should be low for correct operation
Comments
Comments
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