User's Manual

Cinterion
®
PLS8-US R4 Hardware Interface Overview
3.6 Digital Audio Interface
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 PLS8-USR4_HIO_v03.915 2017-03-27
Confidential / Preliminary
Page 26 of 44
3.6 Digital Audio Interface
PLS8-US R4 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 R4 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 R4 has 10 GPIOs for external hardware devices. Each GPIO can be configured for
use as input or output. All settings are AT command controlled.