Conditions of Employment MTK 6223 CPU 




As in the MTK 6225 CPU that we discussed earlier, then to be able to work well then the CPU needs 3 main conditions, namely: 
1. Working voltage 
2. Clock 
3. Commands Work 



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


Consider the following layout: 



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


Notice the layout of the pins on the CPU MTK 6235 follows: 




As in previous MTK CPUs working conditions, the MTK terms of employment in 6223 is also equally good and big names tegangannnya. The voltages are: 

- VIO voltage of 2.8v on pin B7 

Input Voltage Out put this is one of the main voltage is directly required by the CPU. If the voltage is not there then the CPU can not work, and our mobile phones will experience totally dead. 


- As much as 1.8v Vcore Voltage 8V at pin A7 

This voltage is also the main voltage required by the CPU to be working. 


- Voltage of 2.8v Vana 8V on pin C1 

This voltage required by the internal IC power, although not a direct voltage to the CPU, However if the voltage is lost will cause the CPU can not work. 


- Voltage of 2.8v Vmem 8V on pin B6 

This voltage required by the flash ic. If this voltage does not exist then ic flash as data storage will not be able to phone us 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 remove one of these voltages. The most correct solution or by the rules is you have to do the replacement MTK, but if you want to do a little pengiritan without replacement IC, then you can make a jumper from the voltage of the voltage at the other.