Siemens TC35 User Manual
20
Interface description
Purpose of the connectors/connections
Use and operation
A SIM card holder from Molex with a SIM_IN
contact is used. Only when the card holder
is inserted is the switched closed.
A SIM card holder from Molex with a SIM_IN
contact is used. Only when the card holder
is inserted is the switched closed.
The card can only be replaced when the
GSM engine is in the POWER DOWN state.
GSM engine is in the POWER DOWN state.
Signal
name
name
PIN I/O
Description of the
GSM module
connectors
GSM module
connectors
Parameters
CCIN
24
I
Input for detection
of the SIM card;
high active
of the SIM card;
high active
R
i
= 1 0 0 k
Ω
to GND
U
iLmax
= 0 . 4 V
@ I = 0 .1mA
U
iHmin
= 1.95V
U
iHmax
= 3 . 3 V
CCRST
25
O
Restart
R
0
= 2 2 0
Ω
CCIO
26
I/O
Date input/output
Input: R
i
≥
1 M
Ω
Output: R
0
= 2 2 0
Ω
CCCLK
27
O
Clock
R
0
= 2 2 0
Ω
CCVCC
28
O
Supply voltage
CCVCC
min
=2.84V
CCVCC
max
=2.96V
I
max
= 5 0 m A
CCGND
29
X