User's Manual

LE940B6 Hardware User Guide
1VV0301331 Rev. 1.8 - 2017-03-15
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4.3. Logic Level Specifications
Unless otherwise specified, all the interface circuits of the LE940B6 are 1.8V CMOS logic.
Only few specific interfaces (such as MAC, USIM and SD Card) are capable of dual voltage I/O.
The following tables show the logic level specifications used in the LE940B6 interface circuits. The
data specified in the tables below is valid throughout all drive strengths and the entire
temperature ranges.
NOTE:
Do not connect LE940B6 digital logic signals directly to OEM digital logic signals with a level
higher than 2.7V for 1.8V CMOS signals.
4.3.1. 1.8V Standard GPIOs
Table 10: Absolute Maximum Ratings – Not Functional
Parameter Min Max
Input level on standard GPIOs when on -0.3V +2.3V
Table 11: Operating Range – Interface Levels (1.8V CMOS)
Parameter Min Max
Input high level 1.26V 2.0V
Input low level -0.2V 0.36V
Output high level 1.6V ---
Output low level --- 0.2V