User Manual

Cinterion
®
PLS8-US R3 Hardware Interface Overview
3.6 Digital Audio Interface
27
PLS8-USR3_HIO_v03.012 2015-10-13
Confidential / Released
Page 26 of 41
3.6 Digital Audio Interface
PLS8-US R3 supports a digital audio interface that can be employed either as pulse code mod-
ulation interface or as inter IC sound interface. Operation of these interface variants is mutually
exclusive, and can be configured by AT command (see [1]). Default setting is pulse code mod-
ulation.
3.7 Analog-to-Digital Converter (ADC)
PLS8-US R3 provides three unbalanced ADC input lines: ADC1_IN, ADC2_IN and ADC3_IN.
They can be used to measure three independent, externally connected DC voltages in the
range of 0.3V to 3.075V.
3.8 GPIO Interface
PLS8-US R3 has 10 GPIOs for external hardware devices. Each GPIO can be configured for
use as input or output. All settings are AT command controlled.