5 C8 C9 C10 4u7 15pF 2u2 470nF C11 R4 0R VDD_PADS R5 NC Y1 26M XTAL_IN XTAL_OUT UART_RX/PIO(0) UART_TX/PIO(1) PIO(6) PIO(7) UART_RTS/PIO(8) UART_CTS/PIO(9) PIO(18) PIO(21) +3V3_OUT SPI_CSB GND CHG_EXT VBUS GND PWR LED_0 LED_1 GND BT_Reset 19 GND A VDD_PADS +1V8_OUT GND1 35 USB_N 34 GND 33 3V3_USB 32 VDD_PADS 31 1V8 USB_P USB_N SPK R_RN SPK R_RP 6 7 SPKR_RN SPKR_RP SPK R_LN SPK R_LP 9 10 SPKR_LN SPKR_LP LINE_BN 4 LINE_BP MIC_BIAS LINE_BN USB_P 5 2u2 36 LINE_BP