AS3977BQFU austriamicrosystems, AS3977BQFU Datasheet - Page 30

• Manufacturer Part Number: AS3977BQFU
• Description: Ultra-High Frequency FSK Transmitter IC
• Manufacturer: austriamicrosystems

Specifications of AS3977BQFU

• Modulation Type: FSK
• Supply Voltage Range: 2V To 3.6V
• Module Interface: Serial
• Supply Current: 17mA
• Ic Function: Multi-Channel Narrowband FSK Transmitter
• Termination Type: SMD
• No. Of Pins: 16
• Rohs Compliant: Yes
• Operating Temperature Range: -40°C To +85°C
• Filter Terminals: SMD
• Digital Ic Case Style: QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS3977
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 23. Configuration Registers Description
www.austriamicrosystems.com/AS3977
H<15:14>
A<11:15>
E<15:10>
F<15:10>
Register
G<15:4>
A<10:9>
B<15:5>
C<14:5>
D<15:0>
H<13:4>
A<4:3>
A<7:5>
C<4:0>
E<9:0>
G<3:0>
H<3:0>
F<9:0>
C<15>
A<8>
B<0>
B<1>
B<2>
B<3>
B<4>
INT1<9:0>
INT2<9:0>
INT3<9:0>
INT4<9:0>
ARSDRS
PN9INT
CPSEC
FRAC1
PLLON
FRAC2
FRAC3
FRAC4
<15:0>
<15:0>
<15:0>
<15:0>
Name
CPCS
<1:0>
<2:0>
<1:0>
DIVR
SD3
application dependent
application dependent
application dependent
application dependent
application dependent
application dependent
application dependent
application dependent
application dependent
Default Value
00000
Revision 3.6
010
11
00
0
0
1
0
0
0
1
Automatic range select division ratio setting
0 (00): f
1 (01): f
2 (10): f
3 (11): f
Reference divider division ratio setting must be set to
Binary 010
Charge pump sections setting
0: One section active
1: Two sections active
Charge pump current setting
0 (00): 12.5 µA/Section
1 (01): 25.0 µA/Section
2 (10): 37.5 µA/Section
3 (11): 50.0 µA/Section
reserved Bits: set to Binary 00000 for normal mode of
operation
0: normal mode of operation
1: reserved for test purposes only
ΣΔ order selection
0: MASH2
1: MASH3
0: reserved Bit; set to zero
0: normal mode
1: reserved for test purposes only
0: normal mode
1: reserved for test purposes only
0: Phase locked loop off
1: Phase locked loop on
Synthesizer fractional setting 2
Synthesizer integer setting 2
Synthesizer fractional setting 3
Synthesizer integer setting 3
Synthesizer fractional setting 4
Synthesizer integer setting 4
reserved Bits: set to Binary 00 for normal mode of
operation
REF
REF
REF
REF
/512
/64
/128
/256
Synthesizer fractional setting 1
Synthesizer integer setting 1
Description
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