4421-DKDB1 Silicon Laboratories Inc, 4421-DKDB1 Datasheet - Page 26

• Manufacturer Part Number: 4421-DKDB1
• Description: KIT DEV TEST EZRADIO SI4421 TRX
• Manufacturer: Silicon Laboratories Inc

Specifications of 4421-DKDB1

• Accessory Type: Test Card, Transceiver, 915MHz
• Wireless Frequency: 915 MHz
• Interface Type: SPI
• Modulation: FSK
• For Use With/related Products: EZRadio®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Application Proposal for LPDM (Low Power Duty-Cycle Mode) Receivers:
16. Low Battery Detector and Microcontroller Clock Divider Command
The 4-bit parameter (v3 to v0) represents the value V, which defines the threshold voltage V
V
Clock divider configuration:
The low battery detector and the clock output can be enabled or disabled by bits eb and dc, respectively, using the Power
Management Command (page 15).
lb
= 2.25 + V · 0.1 [V]
Bit
15
1
14
1
13
0
12
0
11
0
10
0
9
0
d2
0
0
0
0
1
1
1
1
8
0
d1
0
0
1
1
0
0
1
1
d2
7
d0
0
1
0
1
0
1
0
1
d1
6
Frequency [MHz]
Clock Output
d0
5
10
1
1.25
1.66
2
2.5
3.33
5
4
0
v3
3
v2
2
lb
of the detector:
v1
1
v0
0
C000h
POR
Si4421
26