Ccin Signal For Sim Interface (Switch In Dsb35 Support Box); Electrical Characteristics; Table 2 : Switch Located On Dsb35 For The Sim Interface; Table 3 : Electrical Characteristics - Siemens TC35 Application
Hide thumbs
Also See for TC35:
- User manual (39 pages) ,
- At command reference (204 pages) ,
- Migration manual (34 pages)
Table of Contents
Advertisement
5
CCIN signal for SIM interface (switch in DSB35 Support Box)
The X1202 (optional) switch for the CCIN signal of the SIM interface allows to open the
CCIN connection to the GSM engine even if a SIM card is inserted.
Therefore, when the switch is pushed open, the system simulates an empty SIM card holder
as if no SIM card was inserted.
Table 2 : Switch located on DSB35 for the SIM Interface
Switch
Function
X1202
CCIN switch 3 to 2
X1202
CCIN switch 3 to 1
6
Electrical characteristics
Table 3 : Electrical characteristics
Function
Signal
Name
SIM
CCIN
CCRST
CCIO
CCCLK
CCVCC
CCGND
GSM Engine TC35
TC35-AN-01-V00.04
Application Note
Pin
I/O
Signal Level
No.
24
I
IDLE-/ TALK mode:
SIM contact
R
= 100kΩ (internal Pull Down
PD
resistor to GND)
R
= 1kΩ (serial resistor)
i
V
in,low,max
V
in,high,min
Power Down:
be aware of backward supply
25
O
≤ 220Ω (serial resistor)
R
o
external C = 1nF to CCGND
required
26
I/O
Input
≥ 1MΩ
R
i
Output
≤ 220Ω (serial resistor)
R
o
27
O
≤ 220Ω (serial resistor)
R
o
28
O
CCVCC
min
CCVCC
max
I
= 20mA
max
external C ≥ 200nF to CCGND
required
29
-
Ground (0V)
Released
Description
Simulation SIM empty
Normal operation
(active
high)
= 0.4V @ I
= 0.1mA
OUT
= 1.95V, V
=3.3V
i,h,max
= 2.84V
= 2.96V
6/9
Comment
All signals of SIM interface
are protected against
electrostatic discharge
with spark gaps to GND
and clamp-diodes to 2,9V
and GND
If a card is inserted CCIN
has to be at
high-level
If not used connect to
CCVCC
Usage is mandatory
Signal levels according to
GSM Rec. (2)
Length of wire must not
exceed 200mm to meet
the timing requirements of
GSM Rec. 11.10
Usage is mandatory
Usage is mandatory. Do
not connect CCGND to
GND of the application.
See Chapter 7.1 for
recommendations.
Application Note SIM Interface
Version 03.00
Advertisement
Table of Contents
