User's Manual

MeiG hardware design guide
24
4.12 UIM Card Interface
The SLM756P can support two SIM cards at the same time to achieve dual card dual standby. Support
SIM card hot swap, can automatically recognize 1.8V and 3.0V cards. The figure below shows the
recommended interface circuit for the SIM card. In order to protect the SIM card, it is recommended to
use TVS devices for electrostatic protection. The DATA signal requires a 15K resistor to pull up to the
SIM power supply. The device of the peripheral circuit of the SIM card should be close to the SIM card
holder.
The reference circuit is as follows:
Figure 4.29: UIM card interface circuit
4.13 SD Card Interface
SLM756P supports SD card interface and supports up to 64GB
The reference circuit is as follows:
Figure 4.30: SD card interface circuit