STM32F103Z_BGA core board

============ Put ​​the important words first ==============
1. At present, it is only welding test, not all functions are tested (will test again after the holiday) ,
     1. The LCD data line is not sure whether there is a serial signal (it has been tested and there is a picture below)
     2. The SD card data line is not sure whether there is a serial signal
     3. The pin numbers are marked on both sides of the LCD, but the LCD is plugged in from the back (to prevent the gear pins) (picture below)
     4. Do not buy the original parts according to the BOM list, which may not be allowed
. 2. Soldering
     1. The stm32f103z in the BGA package is used (the new one is about 30 RMB)
     2. Although it is BGA, this is what I It doesn't feel like it's difficult to weld, you
 
can do it according to your ability.
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stm32f103z should be familiar to everyone and I won’t say much =-=
===============BGA welding======== =========
You should all have an air gun and the like.
If you want to plant balls, scrape solder paste or something. Go to B station to find a video.
The temperature should not be too high. The steel mesh cannot stand
the flux. It is a necessity.
(I am too lazy to write emm when I have time)
 
 
================IO distribution================
     IO distribution It’s quite concentrated, don’t distract
     from the rest. You can read it by yourself =-= I was too lazy to write a description of
          the LCD slot when viewed from the front and
            the LCD slot when viewed from the back
================= ====================
=================LCD============ =====
ps The control address used here is A6 (the Atomic F4 uses A6),
so when using the LCD screen, you need to change #define LCD_BASE ((u32)(0x6C000000 | 0x000007FE)) to #define LCD_BASE ((u32 )(0x6C000000 | 0x0000007E))
 
================ Attached Pictures ==================
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That's it (I'm lazy).
This design uses 103 in bga package (yes This is the difference)