User guide

M80 EVB User Guide
M80_EVB_User_Guide_V1.2 - 22 -
Figure 19: Pins of SIM1 card cassette
Table 7: Pins of SIM card interface
Pin
Signal
I/O
Description
Note
1
GND
GND
2
VPP
Not connected
3
SIM1_DATA
I/O
SIM1 card data I/O
4
SIM1_CLK
O
SIM1 card clock
5
SIM1_RST
O
SIM1 card reset
6
SIM1_VDD
O
SIM1 power
7
Pulled down to GND with external
circuit. When the SIM card is
inserted, pin 7 is connected to pin 8.
8
SIM1_PRESENCE
I
SIM1 Card detect
3.4.2. SIM2 card interface
In order to be compatible with further application, M80 reserves an SIM IC and SIM2 cassette in
the EVB board. The schematic of SIM IC is same as SIM2 card. The SIM2 card interface does not
support SIM card detection. The following picture shows the schematic and test points.
8
4
5
6
1
2
3
7
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