Telit Wireless Solutions UC864 manual Logic level specifications

UC864-E Hardware User Guide

1vv0300766a Rev.1 - 31/01/08

Not all GPIO pads support all these three modes:

•GPIO5 supports all three modes and can be input, output, RFTX monitor output (Alternate function)

•GPIO6 supports all three modes and can be input, output, alarm output (Alternate function)

•GPIO7 supports all three modes and can be input, output, buzzer output (Alternate function)

11.1 Logic level specifications

Where not specifically stated, all the interface circuits work at 2.6V CMOS logic levels. The following table shows the logic level specifications used in the UC864-E interface circuits:

Absolute Maximum Ratings -Not Functional

	Parameter	UC864-E
		Min	Max
	Input level on any	-0.3V	+3.0V
	digital pin when on
	Input voltage on	-0.3V	+3.0 V
	analog pins when on
For 2.6V CMOS signals;

Operating Range - Interface levels

Level	UC864-E
	Min	Max
Input high level	2.0V	2.9 V
Input low level	-0.3V	0.6V
Output high level	2.2V	2.6V
Output low level	0V	0.35V

For 1.8V signals:

Operating Range - Interface levels (1.8V CMOS)

Level	UC864-E
	Min	Max
Input high level	1.5V	2.1V
Input low level	-0.3V	0.5V
Output high level	1.4V	1.8V
Output low level	0V	0.35V

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