1.STM32F20x找不到BGA焊盘的Recommended PCB design rules,类似STm32F103中有类似数据
2.有关STM32F20x的MSL Level数据,好像STM32F1xx和STM32F2xx没找到
3.有关STM32F20x BGA的reflow的焊接曲线数据,也没有会找到;
看到AN2639有些数据,但是Peak/classification temperature,说明解释Package dependant, see temperature indicated on box label. 还是和封装有关,哪里找得到BGA-176+25的数据呢?
谢谢 |