Test instruction: turn 4-bit dip switch to related position according to model of chips; If chip is STM8S series, switch position is UDDU, if chip is STM8L, switch position is DUUD, U means dial up, D means dial down; Link ST-LINK pins of 3.3V, SWIM, GND, RST to VDD(+), SWIM, VSS(-), NRST respectively for programming; Supports STM8 MCUs of S003, S903, S103, L101, L151, L051 series and package is TSSOP20