Figure 16: 8 Pin Usim Card Holder Reference Circuit - SimCom SIM7200 Hardware Manual

reference circuit of the 8-pin USIM card holder is illustrated as in the following figure.
USIM_PWR
USIM_RST
SIM7200 USIM_CLK
USIM_DET
Module
USIM_DATA
The USIM_DET pin is used for detection of the USIM card hot swap. User can select the 8-pin USIM card
holder to implement USIM card detection function.
If the USIM card detection function is not used, user can keep the USIM_DET pin open. The reference circuit
of 6-pin USIM card holder is illustrated in the following figure.
USIM_PWR
USIM_RST
USIM_CLK
USIM_DET
SIM7200
Module
USIM_DATA
USIM card circuit is susceptible to be interfered, causing the USIM card failure or some other issues, so it is
strongly recommended to follow these guidelines while designing:

Make sure that USIM card holder stay away from antenna while in PCB layout, distance of the USIM
connector and the module should be less than 10cm, shield the signals by GND to keep USIM
interface away from system noise;

USIM traces should keep away from RF lines, VBAT and high-speed signal lines, and the shorter the
better; Avoid routing the USIM_CLK and USIM_DATA lines in parallel and distances over 2 cm, the
cross-coupling of these lines can cause failures;

The rise time of USIM_CLK and USIM_DATA should be less than 1μs, user should keep low
SIM7200-PCIe_ Hardware_Design _V1.01
22PF

Figure 16: 8 Pin USIM card holder reference circuit

22pF
Figure 17: 6 Pin USIM card holder reference circuit
Smart Machine Smart Decision
VCC
CLK
PRESENCE
IP42220CZ6
1uF
USIM Card Holder
VCC
RST
CLK
1uF
IP42220CZ6
25
USIM Card Holder
GND
VPP
RST
I/O
GND
GND
VPP
I/O
2016-05-19