Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.1.1 USB Interface
- 2.1.2 Serial Interface ASC0
- 2.1.3 Serial Interface ASC1
- 2.1.4 UICC/SIM/USIM Interface
- 2.1.5 Analog Audio Interface
- 2.1.6 Digital Audio Interface
- 2.1.7 GPIO Interface
- 2.1.8 I2C Interface
- 2.1.9 SPI Interface
- 2.1.10 HSIC Interface
- 2.1.11 PWM Interfaces
- 2.1.12 Pulse Counter
- 2.1.13 Status LED
- 2.1.14 Fast Shutdown
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 2.1 Application Interface
- 3 Operating Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
®
EHS6-A Hardware Interface Overview
2.1 Application Interface
22
EHS6-A_HIO_v04.000 2019-03-05
Confidential / Preliminary
Page 15 of 40
The figure below shows a circuit to connect an external SIM card holder.
Figure 5: External UICC/SIM/USIM card holder circuit
The total cable length between the SMT application interface pads on EHS6-A and the pads of
the external SIM card holder must not exceed 100mm in order to meet the specifications of
3GPP TS 51.010-1 and to satisfy the requirements of EMC compliance.
To avoid possible cross-talk from the CCCLK signal to the CCIO signal be careful that both
lines are not placed closely next to each other. A useful approach is using a GND line to shield
the CCIO line from the CCCLK line.
2.1.5 Analog Audio Interface
EHS6-A has an analog audio interface with a balanced analog microphone input and a bal-
anced analog earpiece output. A supply voltage and an analog ground connection are provided
at dedicated pads.
2.1.6 Digital Audio Interface
EHS6-A digital audio interface (DAI) can be used to connect audio devices capable of pulse
code modulation (PCM) or be used as inter IC sound interface. Operation of these interface
variants is mutually exclusive, and can be configured by AT command (see [1]).
SIM
CCVCC
CCRST
CCIO
CCCLK
220nF
1nF
CCIN
V180