User's Manual

Cinterion
®
ALS3-US R4 Hardware Interface Overview
3 Application Interface
27
 ALS3-USR4_HIO_v03.915 2017-03-27
Confidential / Preliminary
Page 19 of 44
3 Application Interface
ALS3-US R4 is equipped with an SMT application interface (LGA pads) that connects to the
external application. The host interface incorporates several sub-interfaces described in the fol-
lowing sections:
• Operating modes - see Section 3.1
• Power supply - see Section 3.2
• Serial interface USB - see Section 3.3
• Serial interface ASC0 - Section 3.4
• UICC/SIM/USIM interface - see Section 3.5
• Analog audio interface - see Section 3.6
• Digital audio interface (PCM or I
2
S) - see Section 3.7
• ADC interface - Section 3.8
• GPIO interface - Section 3.9