EVAL-ADF7021-NDBZ2 Analog Devices Inc, EVAL-ADF7021-NDBZ2 Datasheet - Page 49

• Manufacturer Part Number: EVAL-ADF7021-NDBZ2
• Description: 860 MHz To 870 MHz
• Manufacturer: Analog Devices Inc
• Type: Transceiver, FSKr

Specifications of EVAL-ADF7021-NDBZ2

• Frequency: 860MHz ~ 870MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADF7021-N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REGISTER 0—N REGISTER
•
•
The RF output frequency is calculated by the following:
For the direct output
For the RF_DIVIDE_BY_2 (R1_DB18) selected
In UART/SPI mode, the TxRxCLK pin is used to input the
Tx data. The Rx Data is available on the TxRxDATA pin.
M3
0
0
0
0
1
1
1
1
RF
RF
MUXOUT
OUT
OUT
M2
0
0
1
1
0
0
1
1
=
=
M1
0
1
0
1
0
1
0
1
PFD
PFD
U1
0
1
×
×
MUXOUT
REGULATOR_READY (DEFAULT)
FILTER_CAL_COMPLETE
DIGITAL_LOCK_DETECT
RSSI_READY
Tx_Rx
LOGIC_ZERO
TRISTATE
LOGIC_ONE
TR1
0
1
UART_MODE
DISABLED
ENABLED
⎛
⎜
⎝
0
5 .
Integer
×
Tx/Rx
TRANSMIT
RECEIVE
⎛
⎜
⎝
Integer
_
N8
0
0
.
.
.
1
1
1
N
INTEGER_N
+
_
N7
0
0
.
.
.
1
1
1
Fractional
N
+
Fractional
N6
0
0
.
.
.
1
1
1
2
15
N5
1
1
.
.
.
1
1
1
2
_
15
N
Figure 63. Register 0—N Register Map
N4
0
1
.
.
.
1
1
1
⎞
⎟
⎠
_
N
N3
1
0
.
.
.
1
1
1
⎞
⎟
⎠
Rev. 0 | Page 49 of 64
N2
1
0
.
.
.
0
1
1
N1
1
0
.
.
.
1
0
1
INTEGER_N
DIVIDE RATIO
23
24
.
.
.
253
254
255
FRACTIONAL_N
•
•
M15
0
0
0
.
.
.
1
1
1
1
FILTER_CAL_ COMPLETE in the MUXOUT map in
Figure 63 indicates when a coarse or coarse plus fine
IF filter calibration has finished. DIGITAL_
LOCK_DETECT indicates when the PLL has locked.
RSSI_READY indicates that the RSSI signal has settled
and an RSSI readback can be performed.
Tx_Rx gives the status of DB27 in this register, which
can be used to control an external Tx/Rx switch.
M14
0
0
0
.
.
.
1
1
1
1
M13
0
0
0
.
.
.
1
1
1
1
...
...
...
...
...
...
...
...
...
...
...
M3
0
0
0
.
.
.
1
1
1
1
M2
0
0
1
.
.
.
0
0
1
1
M1
0
1
0
.
.
.
0
1
0
1
FRACTIONAL_N
DIVIDE RATIO
ADDRESS
0
1
2
.
.
.
32764
32765
32766
32767
ADF7021-N
BITS