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WM_PRJ_Q2686_PTS_001-010
June 30, 2009
Q2686 Wireless CPU
®
•
The signal ~CT105/RTS2* must be configured at low level.
•
Other signals and their multiplexes are not available.
•
Please refer to technical appendixes in the AT commands User Guide [7]
for more information.
3.8
SIM Interface
The Subscriber Identification Module (SIM) may be directly connected to the
Q2686 Wireless CPU
®
via this dedicated interface.
3.8.1
General Description
The five signals are:
•
SIM-VCC: SIM power supply
•
~SIM-RST: reset
•
SIM-CLK: clock
•
SIM-IO: I/O port
•
SIMPRES: SIM card detect
The SIM interface controls a 3V/1V8 SIM. This interface is fully compliant with
the GSM 11.11 recommendations concerning SIM functions.
SIM interface pin description
Signal
Pin
number
I/O
I/O type
Reset
state
Description Multiplexed
with
SIM-CLK
14
O
2V9 / 1V8
0
SIM Clock
Not mux
~SIM-RST 13 O
2V9 / 1V8
0 SIM
Reset
Not mux
SIM-IO 11
I/O
2V9 / 1V8
*Pull-up
SIM Data
Not mux
SIM-VCC 9 O
2V9 / 1V8
SIM
Power
Supply
Not mux
SIMPRES 12 I 1V8
Z SIM
Card
Detect
GPIO18
*SIM-IO pull-up is about 10 k
Ω
.
See Chapter 3.3 “Electrical information for digital I/O” for Open drain, 2V8 and 1V8 voltage
characteristics and Reset state definition.
