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Old 07-01-2010, 12:55   #1 (permalink)
InspireBDIT
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Wink Understanding the Job Requirements CPU MTK 6223

Working conditions MTK 6223 CPU




Like on MTK 6225 CPU which we have discussed before, so being able to work with both the CPU requires three main conditions, namely

1. Working voltage
2. Clock
3. Work orders


Differences that would look so striking on phones that use MTK 6223 CPU (in this comic on your phone G381i and HT Nexian G10) is where there is no IC Power as a major regulator of cell phone use MTK 6225 CPU. In this type of CPU has terintegrated Power management in the CPU itself.


Consider the following layout:




In the layout in the Power Management Circuit nampaj contained in the CPU is MTK 6223. So that the CPU in addition to functioning as a data processor also functions as a regulator. For he is a regulator, then enable the form off and power on the input lines will vbat directly into the CPU

Notice the layout of pins on MTK 6235 CPU follows:



As in the previous MTK CPU working conditions, then the terms of this work on any 6223 MTK are equally good or big name tegangannnya. The voltages are

- Voltage FiO at 2.8v on pin B7

Input Voltage Out put this one of the main voltage needed by the CPU directly. If the voltage does not exist then the CPU can not work, and our phones will experience the death total

- A sum of 1.8v vCore voltage 8V at pin A7
- A sum of 1.8v vCore voltage 8V at pin A7 Stress is also a main voltage required by the CPU to be working.

- Voltage of 2.8v Vana 8V on pin C1


This internal voltage required by IC Power, although not a direct voltage to the CPU sufficient, but if the voltage is missing will cause the CPU can not work.


- Voltage of 2.8v Vmem 8V on pin B6

This voltage is needed by flash ic. If the voltage does not exist then ic flash as data storage device we will not be able terbooting by the CPU and our phones will not be able to live.


Here is an example of the voltage measurement points MTK 6223



If there is one that does not stress out, then we can conclude that the regulator does not function to exclude one of these voltages. The most correct solution or by the rules is that you must perform the replacement of MTK, but if you want to do a little pengiritan without replacing the IC, then you can make jumpers from another large voltage equal voltage.
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