User's Manual

Bluegiga Technologies Oy
Page 18 of 30
4 Power-On Reset and Brownout Detector
BLE113 includes a power-on reset (POR), providing correct initialization during device power on. It also
includes a brownout detector (BOD) operating on the regulated 1.8-V digital power supply only. The BOD
protects the memory contents during supply voltage variations which cause the regulated 1.8-V power to drop
below the minimum level required by digital logic, flash memory, and SRAM. When power is initially applied,
the POR and BOD hold the device in the reset state until the supply voltage rises above the power-on-reset
and brownout voltages.