FLY FS501, Руководство по обслуживанию, Страница: 16 / 29

FLY SERVICE SUPPORT
3.1 Outline
Baseband circuit completes main functions: the procedure data storage, keyboard input, and
the communication between the RF module, RF power control, the control of the power management
module, RUIM card interface, serial download interface, Camera, T-flash, Bluetooth, and MMI
(man-machine interface, such as the display, backlight, buzzer, speaker, microphone, motors,
etc.).
3.1.1 Memory
The baseband part has an eMMC/LPDDR2 MCP. Wherein the amount of eMMC storage 4GB, it stores
a communication protocol layer and application layer software, and storing various system
parameters, calibration parameters, such as RF control correction value of an audio signal, the
IMEI number, and other important information and store user settings data such as phone number,
CALL volume, and tone; LPDDR2 memory 512MB, temporary variables stored phone program run 。
3.1.2 Battery
2000mAh 3.7V lithium-ion battery.
3.1.4 32KHzCrystal
32KHz crystal is used for power-saving mode and real-time clock 。
If Xtal defective phone just entering the power saving mode will be closed 。
3.1.5 SIM Card
SIM card interface is SIM card interface provided by SC7731G.
3.1.6 Audio frequency
The microphone is omnidirectional capacitor type. The largest impedance is 2.2K

。
Headset as a standard 3.5mm headphone jack port, the nominal resistance 32

。
Speaker adopts 11*15 specification, Receiver adopts 12*06 specification.