LR1110
User Manual
Rev.1.0
UM.LR1110.W.APP
March 2020
36 of 130
Semtech
5.4 Power-On-Reset and Brown-Out-Reset
The LR1110 features both POR and BRN features.
The POR/BRN ensure a proper startup of the circuit maintaining the internal blocks reset until a safe level of the battery
voltage is reached, for example at battery insertion. The BRN triggers a device reset in case the battery voltage goes below
the safe operation threshold of 1.7V (typically). The POR/BRN detector has a 50 mV hysteresis.
Refer to
Figure 5-1: LR1110 POR and BRN Functions
for an illustration of the POR and BRN functions.
Table 5-3: GetVbat Command
Byte
0
1
Data from Host
0x01
0x19
Data to Host
Stat1
Stat2
Table 5-4: GetVbat Response
Byte
0
1
Data from Host
0x00
0x00
Data to Host
Stat1
Vbat(7:0)
VBAT V
5 VBat(7:0)
255
---------------------------------
1
–
1.35
=
