Rev 002
40
15. SIM Function
15.1. SIM Connector (J400)
J400 is a standard 1V8 or 3V SIM socket.
Figure 22. SIM Connector
Table 14 details the signals and relative pins for the SIM connector.
Table 14:
Pin-out of SIM Connector
Pin
Number
Signal
Name
I/O
I/O Type
Description
Comment
1
SIM-VCC
O
1V8 or 2V9
SIM
Power Supply
2
SIM-RST
O
1V8 or 2V9
SIM
Reset
3
SIM-CLK
O
1V8 or 2V9
SIM Clock
4
SIMPRES
I
1V8 max(*)
SIM Card Detect
Multiplexed
(GPIO18/INT8)
5
GND
Ground
6
VPP
Not used
7
SIM_DATA
I/O
1V8 or 2V9
SIM Data
8
CC8
1V8
SIMPRES signal supply
(*) For either 1V8 or 3V SIM cards.
The SIM interface controls both the 3V and 1.8V SIM cards.
The ESD protections are used on the all SIM signals.
This function can be electrically disabled when the special soldering is not soldered from J401 to
J405. For example, having it unsoldered allows for transmission of undisturbed signals via the
external connector (J1100) to an external interface board.
By default, the SIM signals are available on its dedicated connector J400 (J401 to J405 soldered).
15.2. SIMPRES Options
If SIMPRES detection is not necessary, it is possible to re-use the SIMPRES/GPIO18/INT8 signal like
a GPIO or an external interruption signal. For this reason, J403 must not be soldered.
