S2-LP datasheet(47/90 Pages) STMICROELECTRONICS

Part #	S2-LP

Description	Excellent receiver selectivity and blocking

PDF	90 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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47 / 90 page

S2-LP

Block description

DocID029944 Rev 1

47/90

5.8

Low battery indicator

The battery indicator can provide the user with an indication of the battery voltage level.

There are two blocks to detect battery level: brownout with a fixed threshold and battery

level detector with a programmable threshold. The MCU enables optionally these blocks to

provide an early warning of impending power failure. It does not reset the system, but gives

the MCU time to prepare for an orderly power-down and provides hardware protection of

data stored in the program memory.

The low battery indicator function is available in any of the S2-LP operation modes. As this

function requires the internal bias circuit operation, the overall current consumption in

STANDBY, SLEEP, and READY modes increase by 400 µA.

5.9

Voltage reference

This block provides the precise reference voltage needed by the internal circuit.

S2-LP Datasheet(PDF) 47 Page - STMicroelectronics