AS3977-BQFU austriamicrosystems, AS3977-BQFU Datasheet - Page 28

• Manufacturer Part Number: AS3977-BQFU
• Description: IC RF TRANSMITTER FSK 16-QFN
• Manufacturer: austriamicrosystems

Specifications of AS3977-BQFU

• Frequency: 300MHz ~ 928MHz
• Applications: ISM
• Modulation Or Protocol: FSK
• Data Rate - Maximum: 100 kbps
• Power - Output: 10dBm
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Current - Transmitting: -

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
The first byte of every SDI sequence is the command byte.
The function code defines the command to be performed.
Transmitter Configuration Register
All configuration registers are readable and writable. The registers are arranged as addressable bytes. The first byte
(A<7:0>) is addressed by 0, the consecutive bytes (A<15:8>, B<7:0>, etc.) are addressed by 1,2, etc. The
configuration register settings (except the registers with default setting when entering or leaving the Power down
mode), do not alter during Power down mode as long as the minimum supply requirements are met.
Table 22. Configuration Registers
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A
B
C
D
E
C0
0
0
1
1
C0
Function Code
15
14
C1
0
1
0
1
reserved
FRAC3<5:0>
C1
13
12
<A1, A0>
Bit
A5
A2
A3
A4
A5
11
FRAC1<10:0>
INT1<9:0>
Transmit data. A0…A5 defines the transmit configuration:
10
CPSC
<1:0>
Register Address or Transmission Configuration
Read data from register at address <A5…A0>
A4
Write data to register at address <A5…A0>
Manchester coding
9
Synchronization
modulation type
Power level /
Revision 3.5
Frequency
FRAC2<15:0>
Function
Selection
PA mode
selection
8
Data
A3
7
Not defined
Command
<2:0>
DIVR
6
0 (00): selects frequency setting 1
1 (00): selects frequency setting 2
2 (10): selects frequency setting 3
3 (11): selects frequency setting 4
0: selects power level / modulation type 1
1: selects power level / modulation type 2
0: off
1: on
0: PA off at the falling edge of ENABLE
(synchronized with baud rate if A5 high)
1: DATAIO is latched at the falling edge of
ENABLE (i.e. TX data are kept constant, PA
stays on)
0: off
1: on
INT2<9:0>
A2
5
Value, Description
ARSDRS
4
<1:0>
FRAC1<15:11>
3
A1
2
1
BSEL
<1:0>
A0
28 - 45
0