Microsd Card Interface; Usb Interface - Nokia RM-721 Service Manual

RM-721; RM-722
System Module
The interface is located into two ASICs; RAP3GS2v4 contains most of the interface functionality and MS ASIC
takes care of card power up/down, card detect, ATR counting and level shifting functions.
Figure 23 SIM interface
The SIM interface supports 1.2V, 1.8V and 3V technology smart cards.

MicroSD card interface

The microSD card is connected to the engine through the level shifter in Pearl/Gazoo to adapt the 1.8V I/O IF
of the RAP3GS2v4.x to the 3V IF of the SD IF.
The microSD card can only be removed or inserted when the battery is removed.
Figure 24 MicroSD card interface

USB interface

The phone has an interface for USB (Universal Serial Bus) and it supports device mode. Device mode means
that the mobile terminal can be a USB device for a USB host such as PC.
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