Telit Wireless Solutions WE866, Hw User Manual, Page: 22 / 54

WE866 HW User Guide
1VV0301330 Rev. 3 Page 22 of 54 2018-03-13
5. DIGITAL SECTION
Logic Levels
The following table shows the logic level specifications use in WE866:
Parameter Min Max
Input level on any digital pin
(CMOS 1.8V) when on -0.3V +2.1V
Level Min Max
V
IH
Input high level 1.5V 2.1V
V
IL
Input low level 0V 0.4V
V
OH
Output high level 1.6V 2.1V
V
OL
Output low level 0V 0.2V
V
IL
nRESET 0V 0.6V
The nRESET pin must be held below 0.6V for the device to register a reset.
Level Typical
Input current 5nA
Output current 6mA
Power On
The module is usually in state on mode. ON_OFF line is internally pulled up and when
VBATT is applied the module is automatically turned on.
The device need 3 ms to switch on the device and have all the internally voltage stable,
this soft start prevents excessive voltage drops of primary cells and rechargeable batteries
with high internal impedance. nRESET must be held low until the VBATT supply to the
device is driven and stable.