SDI1SDO/SPI_CFG02LED_03LINK_ST4RESET#5LED_16CLK25_REF7XTAL_I/CLK_IN8XTAL_O9DNC10DNC11TXN12RXN13RXP14TXP15AVDD_H16AVDD_H17DNC18CEXT_219CEXT_320DNC21AVDD_L22DLDO_1P123DVDD_1P124INT#25TEST126TEST227DNC28CS#29TS_TIMER/MS_SEL30TX2P4_EN#31DNC32SWPD_EN#33DNC34VDDIO35DNC36SPI_CFG137SCLK38DNC39TS_CAPT40EP41