Nokia 301 Service Manual page 149

RM-839; RM-840; RM-841
System Module
• The 2G subsystem including the DSP clocks
• The 3G subsystem including the ARM™7 and DSP clocks
• The 32 kHz reference oscillator
• The Memory interface
Special clocks for peripherals include:
• The 48 MHz for USB
• The video accelerator clock
• Camera interface clock
• The 104 MHz for the USIF
• The General purpose timer, the GSM timer and the USIM clocks
• Clock for security functions
• The I2S interface
The Clock outputs for external components are:
• The 32 kHz clock output and general purpose clock outputs
The frequency of the clocks and clock subsystems may be changed during operation for optimization of
current consumption, while other parts of the system continue working at constant frequency.
The following table shows the target maximum frequencies for the main subsystems.
Component
ARM™ 1176
2G DSP
Audio DSP
3G DSP
The clock tree diagram is as below.
Issue 1
Table 6 Maximum frequency for main system component
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Copyright © 2013 Nokia. All rights reserved.
Frequency for main system component
416 MHz
178.29 MHz
178.29 MHz
208 MHz
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