Siemens TC35 - Manual (Page 22)

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.
The card can only be replaced when the
GSM engine is in the POWER DOWN state.
Signal
name PIN I/O Description of the
GSM module
connectors Parameters
CCIN 24 I Input for detection
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