User's Manual

Cinterion
®
ELS31-VA/ELS51-VA Hardware Interface Description
2.1 Application Interface
56
 ELS31-VA_ELS51-VA_HID_v01.000 2017-01-04
Confidential / Preliminary
Page 19 of 106
Status LED LED O V
OL
max = 0.45V
V
OH
min = 1.35V
V
OH
max = 1.85V
If unused keep line open.
By delivery default, the
line is available as LED
line.
If configured for use as
GPIO line, the LED line is
assigned as follows:
LED --> GPO5
Pulse
counter
COUNTER I V
OL
max = 0.45V
V
OH
min = 1.35V
V
OH
max = 1.85V
V
IL
max = 0.63V
V
IL
min = -0.3V
V
IH
min = 1.17V
V
IH
max = 1.85V
If unused keep line open.
By delivery default, the
COUNTER line is origi-
nally available as GPIO
line. If configured for use
as COUNTER line, the
GPIO line is assigned as
follows:
GPIO8 --> COUNTER
ADC
(Analog-to-
Digital con-
verter)
ADC1 I R
I
= 10kOhm
V
I
= 0V ... 2.0V
Resolution 1024 steps
Tolerance +/-2%
ADC1 can be used as
input for external mea-
surements.
If unused keep line open.
SIM card
detection
CCIN I R
I
 90kOhm
V
IL
max = 0.63V
V
IH
min = 1.17V
V
IH
max = 1.85V
CCIN = High, SIM card
inserted.
For details please refer to
Section 2.1.6.
If unused keep line open.
3V SIM
Card Inter-
face
CCRST O V
OH
typical = 2.065V
V
OH
max = 2.95V
V
OL
typical = 0.1V @1mA
V
OL
max = 0.3V
Maximum cable length or
copper track to SIM card
holder should not exceed
100mm.
CCIO I/O V
IL
max = 0.44V
V
IL
min = -0.15V
V
IH
min = 2.065V
V
IH
max = 3.15V
V
OL
typical = 0.1V @1mA
V
OL
max = 0.3V
V
OH
min = 2.065V at I = -10µA
V
OH
max = 2.95V
CCCLK O V
OH
typical = 2.065V
V
OH
max = 2.95V
V
OL
typical = 0.1V @1mA
V
OL
max = 0.3V
CCVCC O V
O
min = 2.85V
V
O
typ = 2.95V
V
O
max = 3.10V
I
O
max = -50mA
Table 2: Signal properties (Continued)
Function Signal name IO Signal form and level Comment