Siemens TC35 Terminal User Manual page 22

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