Principle Of Baseband Circuit; Baseband Chip-Mt6325; Explanation Of Power Management Unit In Mt6235 - FLY DS210 Service Manual

3.3 Principle of Baseband circuit

3.3.1 Baseband chip—MT6325
The Baseband chip MT6235 is a single-chip solution for GSM/GPRS/EDGE mobile phones. Based on the 32-bit
TM
ARM926EJ-s RISC processor, MT6235 support GPRS Class 12. It is the core part of the whole system, it is in
charge of the management of all the other parts. It is consist of multi-media subsystem, external memory interface,
user interface, Radio interface, audio interface, debug interface, and power management.
3.3.2

Explanation of power management unit in MT6235

MT6235 integrates Power Management Unit( PMU ),its main function as below:
a. supply power to the other blocks of MT6235 and the other chips in the whole system.
b. manage battery charging process
c. LED driver, vibrator driver
d. Power-on reset
e. ADC