Data Sheet

LILY-W1 series - Data sheet
UBX-15000203 - R12 Interfaces Page 11 of 42
C1-Public
LILY-W131 can be used in coexistence with an LTE modem. An external additional LTE band pass
filter may be required depending on the location of the antennas. See also the LILY-W1 series system
integration manual [2] for a list of suitable LTE filters.
The FCC/IC modular approvals are not including an additional LTE filter or an antenna switch
design.
2.3 Power supply interfaces
The power for LILY-W1 series modules is supplied through VCC and VCC_IO pins by DC voltage.
The system power supply circuit must be able to support peak power (add 20% as margin over the
typical listed current consumption), as during operation, the current drawn from VCC and VCC_IO
can vary significantly based on the power consumption profile of the Wi-Fi technology.
The separate VCC_IO pin enables integration of the module in either a 1.8 V or 3.3 V application
without any level converters. The module performs calibration when the device is powered up.
2.4 Power mode interfaces
LILY-W1 series modules support external power management control through the Power Down
(PD-n), Host wake up (HOST_WKUP) and the Wake up (WAKE_UP) pins.
2.4.1 Reset
The module is reset to its default operating state under the following conditions:
Internal reset: The module is reset, and the internal CPU starts the boot sequence when the
following internal reset events occur:
o
Power-on reset (POR): Device receives power supplies rise (triggers internal POR circuit)
o
Software/Firmware reset: Host driver issues a soft reset
External pin assertion (PD-n): The module is reset, and the internal CPU begins the boot sequence
when the PD-n input pin transitions from low to high following the power-up sequence. See also
Power down.
2.4.2 Power down
For applications that do not use Wi-Fi, the device can be put into a low-leakage mode of operation
using the one of the following methods:
Using PD-n pin: The power-down state provides the lowest leakage mode of operation. Assert
PD-n low to enter power-down. This must be met to enter a power-down state.
All rails powered off: Alternatively, VCC and VCC_IO can be powered off. In this case, the state of
the PD-n pin is irrelevant.
During power-up the PD-n signal should be low or following the VCC signal.
2.4.3 Sleep
The module Power Save Mode (PSM) implementation is achieved through the coordination of the
driver, firmware, and hardware signals HOST_WKUP and WAKE_UP. See also the LILY-W1 series
system integration manual [2].