Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 3 Operating Characteristics
- 3.1 Operating Modes
- 3.2 Power Up/Power Down Scenarios
- 3.3 Power Saving
- 3.4 Power Supply
- 3.5 Operating Temperatures
- 3.6 Electrostatic Discharge
- 3.7 Blocking against RF on Interface Lines
- 3.8 Reliability Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
®
ELS81-US Hardware Interface Description
2.1 Application Interface
53
els81-us_hid_v01.004 2017-09-27
Confidential / Preliminary
Page 22 of 107
PWM PWM1 O
V
OL
max = 0.25V at I = 1mA
V
OH
min = 1.55V at I = -1mA
V
OH
max = 1.85V
If unused keep lines
open.
Note that the PWM lines
are originally available as
GPIO lines. If configured
as PWM lines, the GPIO
lines are assigned as fol-
lows:
GPIO7 --> PWM1
GPIO6 --> PWM2
PWM2 O
Pulse
counter
COUNTER I Internal up resistor active
V
IL
max = 0.35V at < -200µA
V
IH
min = 1.30V at > -50µA
V
IH
max = 1.85V
If unused keep line open.
Note that the COUNTER
line is originally available
as GPIO line. If config-
ured as COUNTER line,
the GPIO line is assigned
as follows:
GPIO8 --> COUNTER
ADC
(Analog-to-
Digital Con-
verter)
ADC1 I R
I
= 1M
V
I
= 0V ... 1.2V (valid range)
V
IH
max = 1.2V
Resolution 1024 steps
Tolerance 0.3%
ADC can be used as
input for external mea-
surements.
If unused keep line open.
1. After the operating voltage is applied, it is required to wait at least 1 second to trigger the ON signal.
Table 2: Signal properties
Function Signal name IO Signal form and level Comment