User's Manual

Cinterion
®
ELS31-VA/ELS51-VA Hardware Interface Description
Contents
106
 ELS31-VA_ELS51-VA_HID_v01.000 2017-01-04
Confidential / Preliminary
Page 3 of 106
Contents
1 Introduction ................................................................................................................. 9
1.1 Key Features at a Glance .................................................................................. 9
1.2 ELS31-VA/ELS51-VA System Overview ......................................................... 12
1.3 Circuit Concept ................................................................................................ 13
2 Interface Characteristics .......................................................................................... 14
2.1 Application Interface ........................................................................................ 14
2.1.1 Pad Assignment.................................................................................. 14
2.1.2 Signal Properties................................................................................. 16
2.1.2.1 Absolute Maximum Ratings ................................................ 21
2.1.3 USB Interface...................................................................................... 22
2.1.3.1 Interface implementation..................................................... 23
2.1.3.2 Reducing Power Consumption............................................ 24
2.1.4 Serial Interface ASC0 ......................................................................... 25
2.1.4.1 Serial Interface Start-up Behavior ....................................... 26
2.1.5 Serial Interface ASC1 ......................................................................... 27
2.1.6 UICC/SIM/USIM Interface................................................................... 29
2.1.7 Digital Audio Interface......................................................................... 31
2.1.8 Pulse Code Modulation Interface (PCM) ............................................ 31
2.1.9 Inter IC Sound Interface (I
2
S).............................................................. 33
2.1.10 GPIO Interface .................................................................................... 34
2.1.11 I
2
C Interface ........................................................................................ 36
2.1.12 SPI Interface ....................................................................................... 38
2.1.13 Pulse Counter ..................................................................................... 39
2.1.14 HSIC Interface (ELS51-VA Only)........................................................ 39
2.1.15 SDIO Interface (ELS51-VA Only)........................................................ 39
2.1.16 Control Signals.................................................................................... 42
2.1.16.1 Status LED .......................................................................... 42
2.1.16.2 Power Indication Circuit ...................................................... 43
2.1.16.3 Host Wakeup....................................................................... 43
2.1.16.4 Fast Shutdown .................................................................... 45
2.2 RF Antenna Interface....................................................................................... 46
2.2.1 Antenna Interface Specifications ........................................................ 46
2.2.2 Antenna Installation ............................................................................ 47
2.2.3 RF Line Routing Design...................................................................... 48
2.2.3.1 RF Interface Signals Circuit Diagram Example................... 48
2.2.3.2 Line Arrangement Examples ............................................... 49
2.3 Sample Application .......................................................................................... 54
2.3.1 Prevent Back Powering....................................................................... 56
2.3.2 Sample Level Conversion Circuit........................................................ 56