Microusb Connector; User Interface; Display Interface; Keyboard Interface - Nokia 300 Service Manual

RM-781
System Module
The phone supports USB 2.0 with High-Speed (480 Mbps).
Hot swap is supported, which means that USB devices may be plugged in and out at any time.

MicroUSB connector

This phone is provided with a specific connector for microUSB.
Figure 15 MicroUSB connector

User interface

Display interface

The following block diagram illustrates the display interface. Command signals and transmitted data to the
display module comes directly from RAPU.
Figure 16 Display interface

Keyboard interface

All keys (main keyboard, messaging, volume, lock keys) are directly connected to GENIOs of the RAPU.
The main keypad LEDs are controlled by the EM ASIC.
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