Specifications

Cinterion
®
ALAS66A Hardware Interface Overview
2.1 Application Interface
33
 ALAS66A_HIO_v01.000a 2019-02-26
Confidential / Released
Page 23 of 51
2.1.6 Digital Audio Interface
ALAS66A supports one digital audio interface that can be employed as inter IC sound (I2S) in-
terface.
2.1.6.1 Inter IC Sound Interface (I
2
S)
The I
2
S Interface is a standardized bidirectional I
2
S ("Inter-IC Sound Interface") 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)
ALAS66A 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
ALAS66A has 18 GPIOs for external hardware devices. Each GPIO can be configured for use
as input or output.
2.1.9 eMMC Interface
ALAS66A has an eMMC interface that can be used for test purposes, e.g., to write crash dumps
from the module’s FFS to eMMC.