User's Manual

Cinterion
®
ELS61-AUS Hardware Interface Description
2.1 Application Interface
52
 ELS61-AUS_HID_v00.031 2016-06-03
Confidential / Preliminary
Page 20 of 102
1.8V SIM
Card Inter-
face
CCRST O V
OL
max = 0.25V at I = 1mA
V
OH
min = 1.45V at I = -1mA
V
OH
max = 1.90V
Maximum cable length or
copper track to SIM card
holder should not exceed
100mm.
CCIO I/O V
IL
max = 0.35V
V
IH
min = 1.25V
V
IH
max = 1.85V
V
OL
max = 0.25V at I = 1mA
V
OH
min = 1.50V at I = -1mA
V
OH
max = 1.85V
CCCLK O V
OL
max = 0.25V at I = 1mA
V
OH
min = 1.50V at I = -1mA
V
OH
max = 1.85V
CCVCC O V
O
min = 1.75V
V
O
typ = 1.80V
V
O
max = 1.85V
I
O
max = -30mA
I
2
C I2CCLK IO Open drain IO
V
OL
min = 0.35V at I = -3mA
V
OH
max = 1.85V
R external pull up min = 560Ω
V
IL
max = 0.35V
V
IH
min = 1.3V
V
IH
max = 1.85V
According to the I
2
C Bus
Specification Version 2.1
for the fast mode a rise
time of max. 300ns is per-
mitted. There is also a
maximum V
OL
=0.4V at
3mA specified.
The value of the pull-up
depends on the capaci-
tive load of the whole sys-
tem (I
2
C Slave + lines).
The maximum sink cur-
rent of I2CDAT and
I2CCLK is 4mA.
If lines are unused keep
lines open.
I2CDAT IO
SPI SPI_CLK O
V
OL
max = 0.25V at I = 1mA
V
OH
min = 1.55V at I = -1mA
V
OH
max = 1.85V
V
IL
max = 0.35V
V
IH
min = 1.30V
V
IH
max = 1.85V
If lines are unused keep
lines open.
Note that the SPI inter-
face lines are originally
available as GPIO lines.
If configured as SPI lines,
the GPIO lines are
assigned as follows:
GPIO3 --> SPI_CLK
GPIO16 --> MOSI
GPIO17 --> MISO
GPIO19 --> SPI_CS
MOSI O
MISO I
SPI_CS O
Table 2: Signal properties
Function Signal name IO Signal form and level Comment