AL7020S Designer’s Guide
Doc. No. DG_7020B
Altec Electronic AG
Seite 17 / 32
3.5 Internal SIM Card Interface
The AL7020S module has a built-in SIM card reader within the module itself (see
figure 3.5). The SIM card is inserted into the slot provided on the side of the
connectors (bottom side).
The SIM Interface controls a 3V SIM card. This interface is fully compliant with GSM
11.11 recommendation concerning SIM functions.
3.5.1 SIM Card reader pins supported:
Signal
Pin No
I/O
Description
SIMVCC 1
O
SIM
Power
Supply
SIMRST 2
O
SIM
Reset
SIMCLK 3
O
SIM
Clock
SIMGND 5
O
SIM
GND
SIMDATA 7
I/O
SIM
Data
SIMPRES 8
I
SIM Card Detect not
supported
Figure
3-5. SIM C
ARD
R
EADER
SIM Card
Reader
Bottom
View
