Siemens TC35 User Manual page 22

Signal PIN I/O Description of the
name GSM module
connectors
CCIN 24 I Input for detection
of the SIM card;
high active
CCRST 25 O Restart
CCIO 26 I/O Date input/output
CCCLK 27 O Clock
CCVCC 28 O Supply voltage
CCGND 29 X
20
Interface description
Purpose of the connectors/connections
Parameters
R = 1 0 0 k
i
U
iLmax
U
iHmin
R = 2 2 0
0
Input: R
Output: R
R = 2 2 0
0
CCVCC
CCVCC
I
max
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.
to GND
= 0 . 4 V
@ I = 0 .1mA
= 1.95V
U = 3 . 3 V
iHmax
1 M
i
= 2 2 0
0
=2.84V
min
=2.96V
max
= 5 0 m A