Specifications

Cinterion
®
ALAS5 Hardware Interface Overview
2.1 Application Interface
32
 ALAS5_HIO_v00.030a 2019-04-01
Confidential / Preliminary
Page 22 of 50
2.1.6 Digital Audio Interface
ALAS5 has two digital audio interfaces (DAIs) that can be employed as inter pulse code mod-
ulation (PCM) or Inter-IC Sound (I
2
S) interface. Default setting is pulse code modulation.
Please note that the first DAI is reserved for future use.
2.1.6.1 Pulse Code Modulation Interface (PCM)
ALAS5's PCM interface can be used to connect audio devices capable of pulse code modula-
tion.
2.1.6.2 Inter-IC Sound Interface
The Inter-IC Sound Interface is a standardized bidirectional I
2
S based digital audio interface for
transmission of mono voice signals for telephony services.
The I
2
S properties and capabilities comply with the requirements layed out in the Phillips I2S
Bus Specifications, revised June 5, 1996.
2.1.7 Analog-to-Digital Converter (ADC)
ALAS5 provides four unbalanced ADC input lines: ADC[1-2...4-5]_IN. They can be used to
measure four independent, externally connected DC voltages in the range of 0.1V to 1.7V.
2.1.8 GPIO Interface
ALAS5 has 15 GPIOs for external hardware devices. Each GPIO can be configured for use as
input or output. All settings are AT command controlled.
2.1.9 eMMC Interface
ALAS5 has an eMMC interface that can be used for development and test purposes, e.g., to
write crash dumps from the module’s FFS to eMMC.