Semtech LR1110 - LR1110 Power-On-Reset and Brown-Out-Reset

LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
36 of 130
Semtech
www.semtech.com
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
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