Device description

L99UDL01

16/24

DB3264 Rev 3

Figure 6. State diagram

In Sleep mode no active circuitry is supplied. In standby mode logic is initialized but not

operational. There is no function present in either modes in order to minimize the current

consumption. Only wake-up circuitry is active in Standby mode.

2.5.1

Sleep mode

In sleep mode all circuitry is disabled. There is no charge pump or internal voltages. This is

the lowest quiescent current mode.

mode all registers are reset to their default values. Sleep mode is exited when VDD rises

2.5.2

Standby mode

Standby mode has only the 3V3 pre-regulator active for purposes of watching for wake-up.

The charge pump is off and the outputs are disabled.

Standby is entered, from operational mode, when the device is commanded by SPI

To attain the low quiescent state in Standby the EN_OUT pin must be held low.

Standby cannot be entered while in timed actuation or when any output is active. This

operation is not supported.