ML865G1 HW Design Guide
1VV0301632 Rev. 4 Page 32 of 86 2020-09-23
RTC supply
RTC is functional when ML865G1 is in PSM state and VBATT pin is supplied.
RTC settings are erased if VBATT supply is temporary disconnected.
VAUX Power Output
A regulated power supply output is provided on pin 51 in order to supply small devices
from the module, like: level translators, audio codec, sensors, and others.
Pin 51 can be used also as PWRMON (module powered ON indication) function, because
is always active when the module is powered ON and cannot be set to LOW level by any
AT command.
Host can only detect deep sleep mode (PSM) by monitoring of VAUX/PWRMON output pin,
since there is no pin dedicated to PSM status indicator.
The operating range characteristics of the supply are:
Item Min Typical Max
Output voltage 1.78V 1.80V 1.82V
Output current - - 60mA
Output bypass capacitor
(inside the module)
1uF
VAUX during PSM period is OFF ( PSM has to be enabled
previously by AT+CPSMS command)
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