Si4322

10

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

1

0

0

0

0

0

0

d1

d0

g1

g0

r2

r1

r0

en

C080h

d1

d0

VDI output

0

0

Digital RSSI Out (DRSSI)

0

1

Data Quality Detector Output (DQD)

1

0

Clock recovery lock

1

1

Always

g1

g0

0

0

0

0

1

-6

1

0

-12

1

1

-18

r2

r1

r0

RSSIsetth [dBm]

0

0

0

-103

0

0

1

-97

0

1

0

-91

0

1

1

-85

1

0

0

-79

1

0

1

-73

1

1

0

-67

1

1

1

-61

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

0

1

0

f11

f10

f9

f8

f7

f6

f5

f4

f3

f2

f1

f0

AD57h

Band [MHz]

C

868

10

915

11

Frequency Setting Command

Receiver Setting Command

The RSSI threshold depends on the LNA gain, the real RSSI threshold can be calculated:

RSSI

Bit 0 <en>:

Enables the whole receiver chain and crystal ocsillator when set. Enable/disable of the wake-up timer and

the low

battery detector are not affected by this setting.

Bit 7-6 <d1:d0>:

Select the VDI (valid data indicator) signal:

Bit 5-4 <g1:g0>:

Set the LNA gain:

The 12-bit Frequency Setting Command <f11 : f0>

has the value F. The value F should be in the range

of 96 and 3903. When F is out of range, the

previous value is kept. The synthesizer center

frequency f

f

The constant C is determined

by the selected band as:

Bit 3-1 <r2:r0>:

Control the threshold of the RSSI detector: