STM32 series MCU processing chip WLCSP115 test socket
1. Actual requirements:
1. Package: WLCSP package
2.Pin number: 115pin
3. Spacing: 0.4mm
4. Chip type: STM32 ARM M4 32bit MCU+FPU
5. Testing requirements: chip functional debugging, programming and mass production
2. Chip features: 1. Low current and flexible power supply: 1.71~3.6V, internal array, LDO mode, fast wake-up, etc.; 2. Core: 32bit Arm M4 CPU and FPU, frequency up to 80Mhz; 3.16 timer; RTC, etc.
3. Demand analysis: This chip is an ARM architecture chip, and its test is performed with the cooperation of the expansion board. Therefore, the production of the test socket must be based on the various I/O ports of the expansion board and the links to the corresponding main signals of the chip, so it is necessary to Just understand the maximum clock frequency requirements, power supply requirements and other requirements of this chip. 80Mhz clock frequency, low-voltage power supply, and mainstream power supply all have low power consumption, and the actual requirements for the test socket are not that high. This can be done using a regular probe;
4. During the production process, each customized component is strictly inspected to confirm that the structure of the chip is within the allowable range. Only after all components are confirmed to be ok can they be assembled, and the overall inspection is completed before shipment. Note that this structure is a micro-pitch structure. This structure requires attention to the contact. In addition, the chip is relatively thin, so we need to pay attention to making the compaction softer.
