Specifications

Cinterion
®
EHS8 Hardware Interface Overview
2.4 Sample Application
24
 EHS8_HIO_v04.000 2019-03-04
Confidential / Preliminary
Page 24 of 42
Figure 6: Schematic diagram of EHS8 sample application
AUTO_ON / ON
EMERG_RST
VCORE
V180
RESET
ASC0 (including GPIO1...GPIO3 for
DSR0, DTR0, DCD0 and GPIO24 for
RING0)/ SPI_CLK (for DSR0)
HSIC LPM/
GPIO16...GPIO19/
ASC1/
SPI
8
4
CCVCC
CCIO
CCCLK
CCIN
CCRST
SIM
V180
220nF
1nF
I2CCLK
I2CDAT
2.2k
V180
GPIO4 (FST_SHDN)
GPIO5 (Status LED)
GPIO6 (PWM)
GPIO7 (PWM)
GPIO8 (COUNTER)
GPIO11...GPIO15
LED
GND
GND
GND
RF OUT
BATT+
RF
Power supply
Main Antenna
EHS8
All SIM components should be
close to card holder. Keep SIM
wires low capacitive.
*10pF
*10pF
* add optional 10pF for SIM protection
against RF (internal Antenna)
50 µF,
Low ESR!
33pF
Blocking**
Blocking**
2
HSIC
Blocking**
VDDLP
PWR_IND
BATT+
BB
53
204
GPIO20...GPIO23/
PCM (DAI)
4
Blocking**
VDDLP
100k
100k
4.7k
100k
22k
2.2k
3
USB
GND
ANT_GPS_PWR
GPS
GPS
receiver
150 µF,
Low ESR!
33pF